Grundfos DMH 251, DMH 252, DMH 253, DMH 254, DMH 255 Installation And Operating Instructions Manual

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DMH 25x

Dosing pump

GRUNDFOS ALLDOS INSTRUCTIONS

Installation and operating instructions

Declaration of Conformity

We Grundfos Alldos declare under our sole responsibility that the products DMH 251, DMH 252, DMH 253, DMH 254, DMH 255, DMH 256 and DMH 257, to which this declaration relates, are in conformity with the Council Directives on the approximation of the laws of the EC Member States relating to

— Machinery (98/37/EC).

Standard used: EN ISO 12100.

— Electromagnetic compatibility (89/336/EEC).

Standards used: EN 61000-3-2: 1995, + A1 + A2, EN 61000-3-3: 1995 and EN 61326: 1997, + A1 + A2, Class B.

— Electrical equipment designed for use within certain voltage limits

(73/23/EEC) [95]. Standard used: EN 61010-1: 2002.

Pfinztal, 15th November 2007

W. Schwald

Managing Director

Ulrich Stemick

Technical Director

CONTENTS

Page

1. General 3

1.1 Introduction 3

1.2 Service documentation 3

2. Installation data 4

3. Installation sketch 4

4. General information 5

4.1 Applications 5

4.2 Warranty 5

5. Safety 5

5.1 Identification of safety instructions in this manual 5

5.2 Qualification and training of personnel 5

5.3 Risks when safety instructions are not observed 5

5.4 Safety-conscious working 5

5.5 Safety instructions for the operator/user 5

5.6 Safety instructions for maintenance, inspection and installation work 5

5.7 Unauthorised modification and manufacture of spare parts 6

5.8 Improper operating methods 6

5.9 Safety of the system in the event of a failure in the dosing system 6

6. Technical data 6

6.1 Identification 6

6.2 Type key 7

6.3 Pump types 8

6.4 Pump performance 8

6.5 Sound pressure level 11

6.6 Electrical data 11

6.7 AR control unit 11

6.8 Required energy 11

6.9 Ambient and operating conditions 11

6.10 Dosing medium 11

7. Transport and storage 12

7.1 Delivery 12

7.2 Unpacking 12

7.3 Intermediate storage 12

7.4 Return 12

8. Product description and accessories 13

8.1 General description 13

8.2 Dimensional sketches 17

8.3 Weight 19

8.4 Stroke volume 19

8.5 Materials 19

8.6 Data of contact pressure gauge for diaphragm leakage detection (optional) 19

9. Installation 19

9.1 General information on installation 19

9.2 Installation location 19

9.3 Mounting 19

9.4 Approximate values when using pulsation dampers 20

9.5 Optimum installation 21

9.6 Installation tips 21

9.7 Tube / pipe lines 22

9.8 Connecting the suction and discharge lines 22

10. Electrical con necti ons 23

10.1 Electric servomotor (optional) 23

10.2 Electronic preselection counter (optional) 23

10.3 Electrically heated dosing head (optional) 23

10.4 Diaphragm controller (optional) 24

10.5 Connecting the power supply cable 24

11. Start-up / shutdown 24

11.1 Initial start-up / subsequent start-up 24

11.2 Start-up / subsequent start-up of DMH 251, 252 and 253 25

11.3 Start-up / subsequent start-up of DMH 254, 255 and 257 25

11.4 Setting the pressure relief valve 26

11.5 Zero point adjustments 27

11.6 Operating the pump 27

11.7 Shutdown 27

12. Operation 27

12.1 Switching on/off 27

12.2 Setting the dosing capacity 28

12.3 Using the AR control unit (optional) 28

12.4 Electric servomotor (optional) 28

12.5 Electronic preselection counter (optional) 28

12.6 Electrically heated dosing head (optional) 28

13. Maintenance 28

13.1 General notes 28

13.2 Diaphragm leakage control for diaphragm leakage detection 28

13.3 Cleaning and maintenance intervals 29

13.4 Checking the oil level 29

13.5 Cleaning the suction and discharge valves 29

13.6 Replacing the diaphragm and gear oil for dosing head with single diaphragm (no diaphragm leakage detection) 30

13.7 Replacing the diaphragm for dosing head with double diaphragm 31

14. Fault finding chart 34

15. Dosing curves 36

16. Disposal 49

1. General

1.1 Introduction

These installation and operating instructions contain all the information required for starting up and handling the DMH 25x piston diaphragm dosing pump.

If you require further information or if any problems arise, which are not described in detail in this manual, please contact the nearest Grundfos Alldos company.

1.2 Service documentation

If you have any questions, please contact the nearest Grundfos Alldos company or service workshop.

Warning These complete installation and operating

instructions are also available on www.Grundfosalldos.com.

Prior to installation, read these installation and operating instructions. Installation and operation must comply with local regulations and accepted codes of good practice.

2. Installation data

Owner:

Grundfos Alldos customer number:

Order number:

Product number:

Pump serial number:

Put into service on:

Location of pump:

Used for:

3. Installation sketch

Note

Please fill in the data below after commissioning. It will help you and your Grundfos Alldos service partner to make subsequent adjustments to the installation.

4. General information

4.1 Applications

The DMH 25x pump is suitable for liquid, non-abrasive and noninflammable media strictly in accordance with the instructions in this manual.

4.2 Warranty

Warranty in accordance with our general terms of sale and delivery is only valid

• if the pump is used in accordance with the information within this manual.

• if the pump is not dismantled or incorrectly handled.

• if repairs are carried out by authorised and qualified personnel.

• if original spare parts are used for repairs.

5. Safety

This manual contains general instructions that must be observed during installation, operation and maintenance of the pump. This manual must therefore be read by the installation engineer and the relevant qualified personnel/operators prior to installation and start-up, and must be available at the installation location of the pump at all times.

It is not only the general safety instructions given in this "Safety" section that must be observed, but all special safety instructions given in the other sections.

5.1 Identification of safety instructions in this manual

If the safety instructions or other advice in this manual are not observed, it may result in personal injury or malfunction and damage to the pump. The safety instructions and other advice are identified by the following symbols:

Information provided directly on the pump, e.g. labelling of fluid connections, must be maintained in a readable condition at all times.

5.2 Qualification and training of personne l

The personnel responsible for the operation, maintenance, inspection and installation must be appropriately qualified for these tasks. Areas of responsibility, levels of authority and the supervision of the personnel must be precisely defined by the operator.

If the personnel do not have the necessary knowledge, the necessary training and instruction must be given. If necessary, training can be performed by the manufacturer/supplier at the request of the operator of the pump. It is the responsibility of the operator to make sure that the contents of this manual are understood by the personnel.

5.3 Risks when safety instructions are not observed

Non-observance of the safety instructions may have dangerous consequences for the personnel, the environment and the pump. If the safety instructions are not observed, all rights to claims for damages may be lost.

Non-observance of the safety instructions may lead to the following hazards:

• failure of important functions of the pump/system

• failure of specified methods for maintenance

• harm to humans from exposure to electrical, mechanical and chemical influences

• damage to the environment from leakage of harmful substances.

5.4 Safety-conscious working

The safety instructions in this manual, applicable national health and safety regulations and any operator internal working, operating and safety regulations must be observed.

5.5 Safety instructions for the operator/user

Hazardous hot or cold parts on the pump must be protected to prevent accidental contact.

Leakages of dangerous substances (e.g. hot, toxic) must be disposed of in a way that is not harmful to the personnel or the environment. Legal regulations must be observed.

Damage caused by electrical energy must be prevented (for more details, see for example the regulations of the VDE and the local electricity supply company).

5.6 Safety instructions for maintenance, inspection

and installation work

The operator must ensure that all maintenance, inspection and installation work is carried out by authorised and qualified personnel, who have been adequately trained by reading this manual.

All work on the pump should only be carried out when the pump is stopped. The procedure described in this manual for stopping the pump must be observed.

Pumps or pump units which are used for media that are harmful to health must be decontaminated.

All safety and protective equipment must be immediately restarted or put into operation once work is complete.

Observe the points described in the initial start-up section prior to subsequent start-up.

Note

Explosion-proof pumps are identified from the pump and motor nameplates. An EC declaration of conformity is provided in accordance with the EC directive 94/9/EC, the so-called ATEX directive. This declaration of conformity replaces the declaration of conformity in this manual.

Warning To operate a pump which has been identified as

an explosion-proof pump for the dosing of inflammable media or for operation in potentially explosive operating sites in accordance with the EC directive 94/9/EC, refer to the enclosed manual "Operating an explosion-proof pump" in addition to this manual.

Warning Other applications or the operation of pumps in

ambient and operating conditions, which are not approved, are considered improper and are not permitted. Grundfos Alldos accepts no liability for any damage resulting from incorrect use.

Warning If these safety instructions are not observed,

it may result in personal injury!

Caution

If these safety instructions are not observed, it may result in malfunction or damage to the equipment!

Note

Notes or instructions that make the job easier and ensure safe operation.

Warning The pump must be installed in a position where

it is easily accessible during operation and maintenance work.

Observe the flow direction of valves (indicated by an arrow on the valve)!

Only tighten plastic valves by hand. Only use the prescribed line types! Electrical connections must only be carried out

by qualified personnel!

5.7 Unauthorised modification and manufacture of spare parts

Modification or changes to the pump are only permitted following agreement with the manufacturer. Original spare parts and accessories authorised by the manufacturer are safe to use. Using other parts can result in liability for any resulting consequences.

5.8 Improper operating methods

The operational safety of the supplied pump is only ensured if it is used in accordance with section 6. Technical data. The specified limit values must under no circumstances be exceeded.

If the assumption is made that a safe operation is no longer possible, switch off the pump and protect it against unintentional operation.

This action should be taken

• if the pump has been damaged.

• if the pump no longer seems to be operational.

• if the pump has been stored for an extended period of time

in poor conditions.

5.9 Safety of the system in the event of a failure in the dosing system

DMH 25x dosing pumps are designed according to the latest technologies and are carefully manufactured and tested. However, a failure may occur in the dosing system. Systems in which dosing pumps are installed must be designed in such a way that the safety of the entire system is still ensured following a failure of the dosing pump. Provide the relevant monitoring and control functions for this.

6. Technical data

6.1 Identification

Fig. 1 DMH nameplate

Warning Make sure that the pump is suitable for the actual

dosing medium! Observe the chemical manufacturer's safety

instructions when handling chemicals! Do not operate the pump next to closed valves.

Warning The pump housing, control unit and sensors

must only be opened by personnel authorised by Grundfos Alldos!

Repairs must only be carried out by authorised and qualified personnel!

Wear protective clothing (gloves and goggles) when working on the dosing head, connections or lines!

Before removing the dosing head, valves and lines, empty any remaining medium in the dosing head into a drip tray by carefully unscrewing the suction valve.

Caution

The resistance of the parts that come into contact with the media depends on the media, media temperature and operating pressure. Ensure that parts in contact with the media are chemically resistant to the dosing medium under operating conditions!

Note

Warning To operate a pump which has been identified as

TM03 8688 2207

Pos. Description

1 Type designation 2 Model 3 Maximum capacity [l/h] 4 Voltage [V] 5 Frequency [Hz] 6 Product number 7 Country of origin 8 Year and week code

9 Marks of approval, CE mark, etc. 10 Maximum pressure [bar] 11 Serial number

6.2 Type key

* Only pumps up to and including 0.37 kW and only single-phase pumps

Example:

DMH 100

- 10

AR PP /E /T -F -G 1

B9B9

FE0

Type range Motor variant

DMH E0 PTC motor for frequency control

Maximum flow [l/h]

E1 Motor type EEx de C T3, 3 x 400 V, 50 Hz

Maximum pressure [bar] Control variant

E2 Motor type EEx de C T4, 3 x 400 V, 50 Hz

B Standard E3 API approval

AR* AR control unit (analog/pulse control)

Mains plug

S1 Stroke output X No plug

AT0 Prepared for servomotor F EU (Schuko)

AT3

Servomotor, 1 x 230 V, 50/60 Hz supply, 4-20 mA control

B USA, Canada

I Australia, New Zealand, Taiwan

AT5

Servomotor, 1 x 115 V, 50/60 Hz supply, 4-20 mA control

E Switzerland

Connection, suction/discharge

AT6

Servomotor, 1 x 230 V, 50/60 Hz supply, 4-20 mA control, EEx d II BT 4

B6 Pipe, 4/6 mm

C2 Pipe, 8/10 mm

AT7

Servomotor, 1 x 115 V, 50/60 Hz supply, 4-20 mA control, EEx d II BT 4

C4 Pipe, 20/25 mm

4 Tube, 6/9 mm

AT8

Servomotor, 1 x 230 V, 50/60 Hz supply, 4-20 mA control, 1 kΩ potentiometer

6 Tube, 9/12 mm

B9 Tube, 19/27 mm, PVC

AT9

Servomotor, 1 x 115 V, 50/60 Hz supply, 4-20 mA control, 1 kΩ potentiometer

Q Tube, 19/27 mm and 25/34 mm

S Tube, 3/8" / 1/2"

Dosing head variant

A Threaded, Rp 1/4, female

PP Polypropylene A1 Threaded, Rp 3/4, female

PV PVDF (polyvinylidene fluoride) V Threaded, 1/4" NPT, female

PVC Polyvinyl chloride A9 Threaded, 1/2" NPT, male

SS Stainless steel, DIN 1.4571 A3 Threaded, 3/4" NPT, female

Y Hastelloy® C A7 Threaded, 3/4" NPT, male

PP-L PP + integrated diaphragm leakage detection

B8 Cementing d. 40 mm and flange DN 32

PV-L PVDF + integrated diaphragm leakage detection

PVC-L PVC + integrated diaphragm leakage detection B1 Tube 6/12 mm/cementing d. 12 mm

SS-L SS + integrated diaphragm leakage detection

B2 Tube 13/20 mm/cementing d. 25 mm

Y-L Y + integrated diaphragm leakage detection

SS-H SS + heating flange in dosing head (electric) B3 Welding d. 16 mm

Gasket material

B4 Welding d. 25 mm

E EPDM B7 Welding d. 40 mm and flange DN 32

VFKM C1 Welding flange DN 32, stainless steel

TPTFE P Flange 1 1/4"

Valve ball material

Valve type

C Ceramics 1 Standard

GGlass 2

Spring-loaded

0.05 bar suction opening pressure;

0.05 bar discharge opening pressure

PTFE

Spring-loaded

0.05 bar suction opening pressure;

0.8 bar discharge opening pressure

SS Stainless steel, DIN 1.4401

Y Hastelloy

C 4

Spring-loaded, discharge side only,

0.8 bar opening pressure

Control panel position

5 For abrasive media

X No control panel

Supply voltage

F Front-mounted (opposite to the dosing head) 0 Without motor, IEC flange

S Side-mounted (same side as the stroke-length adjustment knob) F Without motor, NEMA flange (US)

Sx Side-mounted (side opposite to the stroke-length adjustment knob) G 1 x 230 V, 50/60 Hz

W Wall-mounted H 1 x 120 V, 50/60 Hz

5 3 x 230/460 V, 60 Hz

230/400 V, 50/60 Hz 440/480 V, 60 Hz

K 3 x 500 V 50 Hz

6.3 Pump types

The DMH 25x dosing pump is available for a variety of performance ranges in various sizes. Pump type and designation, see pump nameplate.

The following is indicated on the pump nameplate (see section

6.1 Identification):

• The pump type which specifies the stroke volume, connection size and performance data (see below).

• The pump serial number which is used to identify the pump.

• The most important characteristics of the pump configuration e.g. for dosing head and valve materials. They are described in section 6.2 Type key.

• Maximum flow rate and maximum counter-pressure.

• Mains frequency.

The following is indicated on the motor nameplate:

• required energy

• mains frequency

• power consumption

• enclosure class.

6.4 Pump performance

Performance data at maximum pump counter-pressure

Pump type 50 Hz 60 Hz 100 Hz

Single pump Double pump

Q* p max.

Max.

stroke

rate

Q* p max.

Max.

stroke

rate

Q* p max.

Max.

stroke

rate

[l/h] [bar] [n/min] [l/h] [bar] [n/min] [l/h] [bar] [n/min]

DMH 251

DMH 2.4-10 DMH 2.4-10/2.4-10 2.4 10 14 2.9 10 17 5 10 29 DMH 5-10 DMH 5-10/5-10 5 10 29 6 10 35 10 10 58 DMH 13-10 DMH 13-10/13-10 13 10 63 16 10 75 25 10 126 DMH 19-10 DMH 19-10/19-10 19 10 96 23 10 115 — — — DMH 24-10 DMH 24-10/24-10 24 10 120 — — — — — — DMH 2.3-16 DMH 2.3-16/2.3-16 2.3 16 14 2.8 16 17 4.5 16 29 DMH 4.9-16 DMH 4.9-16/4.9-16 4.9 16 29 5.9 16 35 9.8 16 58 DMH 12-16 DMH 12-16/12-16 12 16 63 14 16 75 24 16 126 DMH 18-16 DMH 18-16/18-16 18 16 96 22 16 115 — — — DMH 23-16 DMH 23-16/23-16 23 16 120 — — — — — — DMH 2.2-25 DMH 2.2-25/2.2-25 2.2 25 14 2.6 25 17 4.4 25 29 DMH 4.5-25 DMH 4.5-25/4.5-25 4.5 25 29 5.4 25 35 9 25 58 DMH 11-25 DMH 11-25/11-25 11 25 63 13 25 75 22 25 126 DMH 17-25 DMH 17-25/17-25 17 25 96 20 25 115 — — — DMH 21-25 DMH 21-25/21-25 21 25 120 — — — — — —

DMH 252

DMH 11-10 DMH 11-10/11-10 111029131035221058 DMH 24-10 DMH 24-10/24-10 24 10 63 29 10 75 48 10 126 DMH 37-10 DMH 37-10/37-10 37 10 96 44 10 115 — — — DMH 46-10 DMH 46-10/46-10 46 10 120 — — — — — — DMH 10-16 DMH 10-16/10-16 10 16 29 12 16 35 20 16 58 DMH 23-16 DMH 23-16/23-16 23 16 63 27 16 75 46 16 126 DMH 36-16 DMH 36-16/36-16 36 16 96 43 16 115 — — — DMH 45-16 DMH 45-16/45-16 45 16 120 54 16 144 — — — DMH 54-16 DMH 54-16/54-16 54 16 144 — — — — — —

DMH 253

DMH 21-10 DMH 21-10/21-10 21 10 29 25 10 35 46 10 58 DMH 43-10 DMH 43-10/43-10 43 10 63 52 10 75 87 10 126 DMH 67-10 DMH 67-10/67-10 67 10 96 78 10 115 — — — DMH 83-10 DMH 83-10/83-10 83 10 120 99 10 144 — — — DMH 100-10 DMH 100-10/100-10 100 10 144 — — — — — —

DMH 254

DMH 50-10 DMH 50-10/50-10 50 10 26 60 10 31 101 10 52 DMH 102-10 DMH 102-10/102-10 102 10 54 122 10 65 203 10 108 DMH 143-10 DMH 143-10/143-10 143 10 75 172 10 90 286 10 150 DMH 175-10 DMH 175-10/175-10 175 10 92 210 10 110 — — —

* l/h per dosing head; double the capacity for double pumps.

6.4.1 Accuracy

• Dosing flow fluctuation: smaller than ± 1 %

• Linearity deviation: ± 1 % of the full-scale value (for water with a fully deaerated dosing head).

6.4.2 Inlet pressure and counter-pressure / suction lift

Maximum inlet pressure

Minimum counter-pressure at the discharge valve of the pump

DMH 213-10 DMH 213-10/213-10 213 10 112 255 10 134 — — — DMH 291-10 DMH 291-10/291-10 291 10 153 — — — — — — DMH 46-16 DMH 46-16/46-16 46 16 26 55 16 31 92 16 52 DMH 97-16 DMH 97-16/97-16 97 16 54 116 16 65 193 16 108 DMH 136-16 DMH 136-16/136-16 136 16 75 163 16 90 271 16 150 DMH 166-16 DMH 166-16/166-16 166 16 92 200 16 110 — — — DMH 202-16 DMH 202-16/202-16 202 16 112 242 16 134 — — — DMH 276-16 DMH 276-16/276-16 276 16 153 — — — — — —

DMH 255

DMH 194-10 DMH 194-10/194-10 194 10 54 233 10 65 387 10 108 DMH 270-10 DMH 270-10/270-10 270 10 75 324 10 90 540 10 150 DMH 332-10 DMH 332-10/332-10 332 10 92 398 10 110 — — — DMH 403-10 DMH 403-10/403-10 403 10 112 484 10 134 — — — DMH 550-10 DMH 550-10/550-10 550 10 153 — — — — — —

DMH 257

DMH 220-10 DMH 220-10/220-10 220 10 28 264 10 34 440 10 56 DMH 440-10 DMH 440-10/440-10 440 10 56 528 10 67 880 10 112 DMH 575-10 DMH 575-10/575-10 575 10 73 690 10 88 1150 10 146 DMH 750-4 DMH 750-4/750-4 750 4 73 900 4 88 1500 4 146 DMH 770-10 DMH 770-10/770-10 770 10 98 924 10 118 — — — DMH 880-10 DMH 880-10/880-10 880 10 112 1056 10 134 — — — DMH 1150-10 DMH 1150-10/1150-10 1150 10 146 — — — — — — DMH 1500-4 DMH 1500-4/1500-4 1500 4 146 — — — — — —

Pump type 50 Hz 60 Hz 100 Hz

Single pump Double pump

Q* p max.

Max.

stroke

rate

Q* p max.

Max.

stroke

rate

Q* p max.

Max.

stroke

rate

[l/h] [bar] [n/min] [l/h] [bar] [n/min] [l/h] [bar] [n/min]

Note

The pump can be operated in the range between 10 % and 100 % of the maximum dosing capacity.

Pump type [bar]

DMH 251 8 DMH 252 8 DMH 253 5 DMH 254 5 DMH 255 0.8 DMH 257 0.8

Pump type [bar]

DMH 251 2 DMH 252 2 DMH 253 2 DMH 254 2 DMH 255 2 DMH 257 2

Note

A positive pressure difference of at least 2 bar is required between the suction valve and the discharge valve in order for the dosing pump to operate correctly. If the total counter-pressure (at the dosing point) and geodetic height difference between the suction valve and the dosing point is less than 2 bar (20 m WC), a pressure-lo ading valve must be installed immediately before the dosing point.

Maximum counter-pressure*

* Observe the maximum permissible temperatures.

Maximum suction lift* (continuous operation) for media with a viscosity similar to water

* Applies to a filled dosing head.

Pump type

p max.

[bar]

Single pump Double pump DMH 251

DMH 2.4-10 DMH 2.4-10/2.4-10 10 DMH 5-10 DMH 5-10/5-10 10 DMH 13-10 DMH 13-10/13-10 10 DMH 19-10 DMH 19-10/19-10 10 DMH 24-10 DMH 24-10/24-10 10 DMH 2.3-16 DMH 2.3-16/2.3-16 16 DMH 4.9-16 DMH 4.9-16/4.9-16 16 DMH 12-16 DMH 12-16/12-16 16 DMH 18-16 DMH 18-16/18-16 16 DMH 23-16 DMH 23-16/23-16 16 DMH 2.2-25 DMH 2.2-25/2.2-25 25 DMH 4.5-25 DMH 4.5-25/4.5-25 25 DMH 11-25 DMH 11-25/11-25 25 DMH 17-25 DMH 17-25/17-25 25 DMH 21-25 DMH 21-25/21-25 25

DMH 252

DMH 11-10 DMH 11-10/11-10 10 DMH 24-10 DMH 24-10/24-10 10 DMH 37-10 DMH 37-10/37-10 10 DMH 46-10 DMH 46-10/46-10 10 DMH 10-16 DMH 10-16/10-16 16 DMH 23-16 DMH 23-16/23-16 16 DMH 36-16 DMH 36-16/36-16 16 DMH 45-16 DMH 45-16/45-16 16 DMH 54-16 DMH 54-16/54-16 16

DMH 253

DMH 21-10 DMH 21-10/21-10 10 DMH 43-10 DMH 43-10/43-10 10 DMH 67-10 DMH 67-10/67-10 10 DMH 83-10 DMH 83-10/83-10 10 DMH 100-10 DMH 100-10/100-10 10

DMH 254

DMH 50-10 DMH 50-10/50-10 10 DMH 102-10 DMH 102-10/102-10 10 DMH 143-10 DMH 143-10/143-10 10 DMH 175-10 DMH 175-10/175-10 10 DMH 213-10 DMH 213-10/213-10 10 DMH 291-10 DMH 291-10/291-10 10 DMH 46-16 DMH 46-16/46-16 16 DMH 97-16 DMH 97-16/97-16 16 DMH 136-16 DMH 136-16/136-16 16 DMH 166-16 DMH 166-16/166-16 16 DMH 202-16 DMH 202-16/202-16 16 DMH 276-16 DMH 276-16/276-16 16

DMH 255

DMH 194-10 DMH 194-10/194-10 10 DMH 270-10 DMH 270-10/270-10 10 DMH 332-10 DMH 332-10/332-10 10 DMH 403-10 DMH 403-10/403-10 10 DMH 550-10 DMH 550-10/550-10 10

DMH 257

DMH 220-10 DMH 220-10/220-10 10 DMH 440-10 DMH 440-10/440-10 10 DMH 575-10 DMH 575-10/575-10 10 DMH 750-4 DMH 750-4/750-4 10 DMH 770-10 DMH 770-10/770-10 10 DMH 880-10 DMH 880-10/880-10 10 DMH 1150-10 DMH 1150-10/1150-10 4 DMH 1500-4 DMH 1500-4/1500-4 4

Pump type

Maximum suction lift

[m WC] DMH 251 1 DMH 252 1 DMH 253

DMH 21-10 1 DMH 43-10 1 DMH 67-10 1 DMH 83-10 1 DMH 100-10 Flooded suction

DMH 254

DMH 50-10 1 DMH 102-10 1 DMH 143-10 1 DMH 175-10 1 DMH 213-10 1 DMH 291-10 Flooded suction DMH 46-16 1 DMH 97-16 1 DMH 136-16 1 DMH 166-16 1 DMH 202-16 1 DMH 276-16 Flooded suction

DMH 255 Flooded suction DMH 257

DMH 220-10 1 DMH 440-10 1 DMH 575-10 1 DMH 770-10 1 DMH 880-10 Flooded suction DMH 1150-10 Flooded suction DMH 750-4 Flooded suction DMH 1500-4 Flooded suction

Pump type

p max.

[bar]

Single pump Double pump

Maximum suction lift (continuous operation) for media with maximum permissible viscosity

6.5 Sound pressure level

* Testing according to DIN 45635-01-KL3.

6.6 Electrical data

6.6.1 Enclosure class

The enclosure class depends on the motor variant selected, see motor nameplate.

The specified enclosure class can only be ensured if the power supply cable is connected with the same degree of protection.

Pumps with electronics: The enclosure class is only met if the sockets are protected! The data regarding the enclosure class applies to pumps with correctly inserted plugs or screwed-on caps.

6.6.2 Motor

Version: see motor and pump nameplates.

6.7 AR control unit

Functions of pumps with electronics:

• "Continuous operation" button for function test and dosing head deaeration

• memory function (stores a maximum of 65,000 pulses)

• two-stage tank-empty signal (e.g. via Grundfos Alldos tank empty sensor)

• stroke signal/pre-empty signal (adjustable), e.g. as a feedback to the control room

• dosing controller function (only with sensor – optional)

• diaphragm leakage detection (only with sensor – optional)

• access-code-protected settings

• remote on/off

• Hall sensor

• operating hours counter

• motor monitoring.

Operating modes:

• manual Stroke frequency: manually adjustable between zero and maximum

• contact signal control Multiplier (1:n) and divisor (n:1)

• current signal control 0-20 mA / 4-20 mA Adjustment of stroke frequency proportional to the current signal. Weighting of current input.

6.7.1 Inputs and outputs

AR control unit factory settings

• Inputs and outputs: NO (normally open) or

• inputs and outputs: NC (normally closed).

6.8 Required energy

Power supply for AC voltage

Maximum permissible mains impedance

(0.084 + j 0.084) Ohm (testing according to DIN EN 61000-3-11). These details apply to 50 Hz.

6.9 Ambient and operating conditions

• Permissible ambient temperature: 0 °C to +40 °C (for an installation height up to 1000 m above sea level).

• Permissible storage temperature: –20 °C to +50 °C.

• Permissible air humidity: max. relative humidity: 70 % at +40 °C, 90 % at +35 °C.

Pumps with AR control unit only

Maximum permissible mains impedance: 0.084 + j 0.084 Ω (testing according to EN 61000-3-11).

6.10 Dosing medium

The dosing medium must have the following basic characteristics for the standard pumps:

• liquid

• non-abrasive The dosing of abrasive media is possible with certain versions, on request.

• non-inflammable The dosing of inflammable media is possible with certain versions of explosion-proof pumps, in accordance with ATEX.

Pump type

Maximum suction lift

[m WC]

DMH 251 Flooded suction DMH 252 Flooded suction DMH 253 Flooded suction DMH 254 Flooded suction DMH 255 Flooded suction DMH 257 Flooded suction

Pump type

DMH 251 55 ± 5 dB(A)* DMH 252 55 ± 5 dB(A)* DMH 253 65 ± 5 dB(A)* DMH 254 65 ± 5 dB(A)* DMH 255 75 ± 5 dB(A)* DMH 257 75 ± 5 dB(A)*

Inputs

Contact signal Maximum load: 12 V, 5 mA Current 0-20 mA Maximum load: 22 Ω Remote on/off Maximum load: 12 V, 5 mA Two-stage tank-empty signal Maximum load: 12 V, 5 mA Dosing controller and diaphragm leakage sensor

Outputs

Current 0-20 mA Maximum load: 350 Ω

Error signal

Maximum ohmic load: 50 VDC / 75 VAC, 0.5 A

Stroke signal Contact time/stroke: 200 ms

Pre-empty signal

Maximum ohmic load: 50 VDC / 75 VAC, 0.5 A

Rated voltage

Permissible deviation from rated

value

230 / 400 V ± 10 % 240 / 415 V ± 10 % 115 V ± 10 %

Caution

The installation site must be under cover! Do not install outdoors!

Note

In the event of questions regarding the material resistance and suitability of the pump for specific dosing media, please contact Grundfos Alldos.

Maximum permissible viscosity at operating temperature*

Applies to:

• Newtonian liquids

• non-degassing media

• media without suspended matter

• media with a density similar to water.

* The stated values are approximate values and apply to the

standard pumps.

Permissible media temperature

* For SIP/CIP applications: A temperature of 145 °C at a

counter-pressure of max. 2 bar is permitted for a short period (15 minutes).

** At 70 °C, the maximum counter-pressure is 9 bar.

7. Transport and storage

7.1 Delivery

The DMH 25x dosing pumps are supplied in different packaging, depending on pump type and the overall delivery. For transport and intermediate storage, use the correct packaging to protect the pump against damage.

7.2 Unpacking

Retain the packaging for future storage or return, or dispose of the packaging in accordance with local regulations.

7.3 Intermediate storage

• Permissible storage temperature: –20 °C to +50 °C.

• Permissible air humidity: max. relative humidity: 70 % at +40 °C, 90 % at +35 °C.

7.4 Return

The pump must be thoroughly cleaned before it is returned or stored. It is essential that there are no traces of toxic or hazardous media remaining on the pump. Drain the oil from the drive mechanism and package the pump correctly.

Before returning the pump to Grundfos Alldos for service, the safety declaration at the end of these instructions must be filled in by authorised personnel and attached to the pump in a visible position.

If Grundfos Alldos is requested to service the pump, it must be ensured that the pump is free from substances that can be injurious to health or toxic. If the pump has been used for such substances, the pump must be cleaned before it is returned.

If proper cleaning is not possible, all relevant information about the chemical must be provided.

If the above is not fulfilled, Grundfos Alldos can refuse to accept the pump for service. Possible costs of returning the pump are paid by the customer.

The safety declaration can be found at the end of these instructions.

Note

Note that the viscosity increases with decreasing temperature!

Pump type

Up to stroke

rate 63 [n/min]

Stroke rate

64-120

[n/min]

From stroke

rate 121

[n/min]

Maximum viscosity* [mPa s ]

DMH 251 300 100 50 DMH 252 300 100 50 DMH 253 300 100 10 DMH 254 300 100 5 DMH 255 200 100 5 DMH 257 200 50 5

Dosing head material

Min. media

temperature

Max. media temperature

p < 10 bar p < 16 bar

[°C] [°C] [°C]

PVC 0 40 20 Stainless steel,

DIN 1.4571*

–10 100 100

Stainless steel, DIN 2.4610*

–10 100 100

PP 0 40 20 PVDF** –10 60 20

Warning Observe the chemical manufacturer's safety

instructions when handling chemicals!

Caution

The dosing medium must be in liquid form! Observe the freezing and boiling points of the

dosing medium! The resistance of the parts that come into contact

with the media depends on the media, media temperature and operating pressure. Ensure that parts in contact with the media are chemically resistant to the dosing medium under operating conditions!

Make sure that the pump is suitable for the actual dosing medium!

Caution

Do not throw or drop the pump. Do not use the protective packaging as transport

packaging.

Caution

Grundfos Alldos accepts no liability for damage caused by incorrect transportation, missing or unsuitable packaging of the pump, residual media or leaking oil!

Caution

If a pump has been used for a medium which is injurious to health or toxic, the pump will be classified as contaminated.

Caution

The replacement of the power supply cable must be carried out by an authorised Grundfos Alldos service workshop.

8. Product description and accessories

8.1 General description

The DMH 25x are oscillatory positive-displacement pumps with hydraulic diaphragm control. The operation procedure of the dosing pump is shown in the sectional drawing. See fig. 1.

The rotational movement of the drive motor (1p) is converted via the worm gearing (2p) and eccentric (3p) into the oscillatory suction and stroke movement of the piston (6p). The piston has a hollow bore and a row of radial control holes, which provide a hydraulic connection between the drive area and the piston stroke area. The sliding plug (5p) envelops the holes during the stroke and seals the stroke area from the drive area.

The hydraulic excursion of the solid PTFE diaphragm (Q) displaces an equivalent volume of dosing medium from the dosing head (2) into the discharge line. With the suction stroke, the piston creates a low pressure, which propagates in the dosing head, the ball valve (3b) on the dosing side closes and the dosing medium flows through the suction valve (3a) into the dosing head.

The stroke volume size is solely determined by the position of the sliding plug. The active stroke length and corresponding average dosing flow can therefore be changed continuously and linearly from 10 % to 100 % using the stroke-length adjustment knob and Nonius (L).

Fig. 2 DMH 251, 252

Fig. 3 DMH 253

TM03 6448 4506

ME3b

3a 9p 3p2p5p6p2Q

TM03 6449 4506

ME3b

3a 9p 3p2p5p6p2Q 4p

Fig. 4 DMH 254

Fig. 5 DMH 255

TM03 6450 4506

M3b

3a 9p 3p2p5p6p2Q 4p

TM03 6451 4506

M3b

3a 9p 3p2p5p4p2Q 6p

Fig. 6 DMH 257

8.1.1 Combined overpressure and degassing valve

The combined overpressure and degassing valve (M) opens if there is an excessive pressure build-up in the dosing system and provokes the constant degassing of the hydraulic medium.

8.1.2 Diaphragm protection system AMS

The diaphragm protection system AMS (9p) has a keypad, which is connected to the dosing diaphragm. The dosing diaphragm oscillates freely in the dosing head and cannot be overstretched due to a fault in the dosing system since the diaphragm protection valve closes if such a fault occurs.

8.1.3 Double-diaphragm system / diaphragm leakage detection (optional)

General

The piston diaphragm and high-tech dosing pumps with drift-free diaphragm leakage detection are equipped with the following:

• dosing head with PTFE double-diaphragm system

• ball non-return valve with built-in contact pressure gauge.

Double-diaphragm system

Dosing pumps with a double-diaphragm system with no diaphragm leakage detection have no pressure gauge. In this case the ball non-return valve is fitted with a locking unit. The valve, however, can be retrofitted with a contact pressure gauge.

Ball non-return valve

In order for the diaphragm leakage detection to work and to protect the diaphragms, the gap must be fully deaerated. Dosing heads with a double diaphragm are equipped with a ball nonreturn valve (T) to prevent air from flowing back during the filling and deaeration process (2u).

Fig. 7 Contact pressure gauge

2) For dosing heads with a double diaphragm with no contact

pressure gauge (no diaphragm leakage detection), a locking unit is fitted instead of the contact pressure gauge.

TM03 6452 4506

M3b

3a 9p 3p2p5p6p2Q 7p

Pos. Components

1p Motor 2p Worm gearing 3p Eccentric 4p Recuperating spring (not with drive size 3) 5p Sliding plug 6p Piston 7p Crank

M Combined overpressure and degassing valve E Degassing valve

9p Diaphragm protection system (AMS)

Q Dosing diaphragm

2 Dosing head 3a Suction valve 3b Discharge valve

L Stroke-length adjustment knob

F Oil-filling screw with dipstick

TM03 6453 4506

Pos. Components

S Contact pressure gauge T Ball non-return valve U Connection piece

Functional principle of diaphragm leakage detection

The non-return valve and the gap between the diaphragms are factory-filled with a separating agent (paraffin oil). They are set in such a way during start-up on the test stand that there is always a hydraulically separated equilibrium between the valve and diaphragm gap (the pressure gauge indicates "0" when the pump is running and when it is stopped).

If one of these diaphragms breaks, the dosing or hydraulic medium penetrates into the gap between the diaphragms and, when the ball is removed, into the valve. The system pressure is therefore impinged on the valve and the contact pressure gauge is activated. Depending on the design of the system, the electrically isolated reed contact can trigger an alarm device or the pump can be switched off.

The contact is triggered at the preset pressure as is shown in the table below:

Description/use

Set pressure

[bar]

For pumps up to 10 bar Pressure gauge 0 to 10 bar

1.5

For pumps up to 10 bar Explosion-proof pressure gauge 0 to 10 bar

1.5

For pumps 16 to 100 bar Pressure gauge 0 to 100 bar

For pumps 16 to 100 bar Explosion-proof pressure gauge 0 to 100 bar

Warning The contact pressure gauge (Ex) in explosion-

proof version with switch amplifier should be used if the pump is fitted with an explosion-proof motor.

8.2 Dimensional sketches

8.2.1 DMH 251, 252, 253

Fig. 8 DMH 251, 252, 253

Measurements in mm.

TM03 6454 4506

l / l'

9mm

Pos. Description

Z1 For double pump, motor turned by 180 °

l For electrical stroke-length adjustment

l’ For pneumatic stroke-length adjustment

Pump type abcde f gh j k l l’nm

DMH 251 345 336 98 192 160 152 86 432 16 116 250 432 118 180 DMH 252 345 336 98 192 160 152 86 432 16 116 250 432 118 180 DMH 253 368 336 98 192 179 152 86 472 13 124 250 432 118 180

8.2.2 DMH 254, 255, 257

Fig. 9 DMH 254, 255, 257

Measurements in mm.

TM03 6455 4506

l / l'

f fx m

9mm

Pos. Description

Z1 For double pump, motor turned by 180 °

fx, mx For double pumps

l For electrical stroke-length adjustment l’ For pneumatic stroke-length adjustment

Pump type abcdeffxghj kl l’nmmx

DMH 254 436 492 156 252 207 185 260 126 718 10 185 235 413 180 225 300 DMH 255 510 492 156 254 228 185 260 126 869 10 253 235 413 180 225 300 DMH 257 589 553 170 274 280 241 333 129 980 25 262 245 420 195 290 382

8.3 Weight

8.4 Stroke volume

8.5 Materials

Pump housing material

• Pump housing: Al 226.

AR control unit enclosure

• Upper part of enclosure: PPO blend

• Lower part of enclosure: aluminium.

8.6 Data of contact pressure gauge for diaphragm leakage detection (optional)

The contact pressure gauge has a reed switch with electrically isolated contact output, maximum switching power 10 W for DC current or 10 VA for AC current. The maximum switching voltage is 100 V, maximum switching current 0.5 A.

The switching function is set up as an NC contact, i.e. if the diaphragm breaks, the current circuit is interrupted.

The pressure gauge has a 2-metre cable.

9. Installation

9.1 General information on installation

9.2 Installation location

9.2.1 Space required for operation and maintenance

Maintenance work on the dosing head and the valves must be carried out regularly.

• Provide sufficient space for removing the dosing head and the

valves.

9.2.2 Permissible ambient influences

• Permissible ambient temperature: 0 °C to +40 °C

(for an installation height up to 1000 m above sea level).

• Permissible air humidity: max. relative humidity:

70 % at +40 °C, 90 % at +35 °C.

9.2.3 Mounting surface

The pump must be mounted on a flat surface.

9.3 Mounting

• Mount the pump on a console or pump foundation using four

screws.

Pump type

Dosing head

material

Weight [kg]

Single

pump

Double

pump

DMH 251

PVC, PP, PVDF 11 13

Stainless steel

1.4571, 2.4610

13 17

DMH 252

PVC, PP, PVDF 11 13

Stainless steel

1.4571, 2.4610

13 17

DMH 253

PVC, PP, PVDF 12 17

Stainless steel

1.4571, 2.4610

14 21

DMH 254

PVC, PP, PVDF 27 32

Stainless steel

1.4571, 2.4610

32 42

DMH 255

PVC, PP, PVDF 55 63

Stainless steel

1.4571, 2.4610

65 83

DMH 257

PVC, PP, PVDF 56 88

Stainless steel

1.4571, 2.4610

68 112

Pump type

Stroke volume [cm

]

4 bar 10 bar 16 bar 25 bar

DMH 251 — 3.5 3.1 2.9 DMH 252 — 6.4 6.3 — DMH 253 — 11.3 — — DMH 254 — 31.6 30 — DMH 255 — 60 — — DMH 257 171 131 — —

Warning Observe the chemical manufacturer's safety

instructions when handling chemicals! Make sure that the pump is suitable for the actual

dosing medium!

Caution

Note

Further information on resistance with regard to the media, media temperature and operating pressure is available on request.

Warning Observe the specifications for the installation

location and range of applications described in section 6. Technical data.

Warning Faults, incorrect operation or faults on the pump

or system can, for example, lead to excessive or insufficient dosing, or the permissible pressure may be exceeded. Consequential faults or damage must be evaluated by the operator and appropriate precautions must be taken to avoid them!

Warning Risk of hot surfaces! Pumps with AC motors may become hot.

Allow a minimum space of 100 mm to the fan cover!

Note

A positive pressure difference of at least 2 bar is required between the suction valve and the discharge valve in order for the dosing pump to operate correctly. If the total counter-pressure (at the dosing point) and geodetic height difference between the suction valve and the dosing point is less than 2 bar (20 m WC), a pressure-loading valve must be installed immediately before the dosing point.

Note

The pump must be installed in a position where it is easily accessible during operation and maintenance work.

Note

The installation site must be under cover! Do not install outdoors!

Note

The flow must run in the opposite direction to gravity!

9.4 Approximate values when using pulsation dampers

The table below indicates the approximate values and the suction line length for which suction pulsation dampers are required. The values apply to 50 Hz operation when water or similar liquids are dosed.

Caution

Risk of damage to the system! It is always recommended to use pulsation

dampers for large high-speed pumps! In particular for pump types with a flow rate

above 1000 l/h (DMH 257), suction and discharge pulsation dampers should be used directly at the pump suction and discharge ports of the pump. The size of the suction and discharge lines should be adjusted accordingly.

Since the pulsation is influenced by many factors, a system-specific calculation is essential. Request a calculation from our calculation program.

Pump type

Stroke rate

[n/min]

Nominal width of

suction line

Maximum

length of

suction line

[m]

DMH 251

DMH 2.4-10 14 DN 8 8 DMH 5-10 29 DN 8 8 DMH 13-10 63 DN 8 3 DMH 19-10 96 DN 8 1.5 DMH 24-10 120 DN 8 1 DMH 2.3-16 14 DN 8 8 DMH 4.9-16 29 DN 8 8 DMH 12-16 63 DN 8 3 DMH 18-16 96 DN 8 1.5 DMH 23-16 120 DN 8 1 DMH 2.2-25 14 DN 8 8 DMH 4.5-25 29 DN 8 8 DMH 11-25 63 DN 8 3 DMH 17-25 96 DN 8 1.5 DMH 21-25 120 DN 8 1

DMH 252

DMH 11-10 29 DN 8 8 DMH 24-10 63 DN 8 2 DMH 37-10 96 DN 8 1 DMH 46-10 120 DN 8 1 DMH 10-16 29 DN 8 8 DMH 23-16 63 DN 8 2 DMH 36-16 96 DN 8 1 DMH 45-16 120 DN 8 1 DMH 54-16 144 DN 8 1

DMH 253

DMH 21-10 29 DN 20 8 DMH 43-10 63 DN 20 8 DMH 67-10 96 DN 20 6 DMH 83-10 120 DN 20 4 DMH 100-10 144 DN 20 3

DMH 254

DMH 50-10 26 DN 20 8 DMH 102-10 54 DN 20 8 DMH 143-10 75 DN 20 5 DMH 175-10 92 DN 20 3 DMH 213-10 112 DN 20 1.5 DMH 291-10 153 DN 20 1 DMH 46-16 26 DN 20 8 DMH 97-16 54 DN 20 8 DMH 136-16 75 DN 20 5 DMH 166-16 92 DN 20 3 DMH 202-16 112 DN 20 1.5 DMH 276-16 153 DN 20 1

DMH 255

DMH 194-10 54 DN 20 5 DMH 270-10 75 DN 20 3 DMH 332-10 92 DN 20 1.5 DMH 403-10 112 DN 20 1 DMH 550-10 153 DN 20 1.5

DMH 257

DMH 220-10 28 DN 32 4.5 DMH 440-10 56 DN 32 4.5 DMH 575-10 73 DN 32 3 DMH 750-4 73 DN 32 1.5 DMH 770-10 98 DN 32 1.5 DMH 880-10 112 DN 32 1 DMH 1150-10 146 DN 32 0.5 DMH 1500-4 146 DN 32 0.5

Pump type

Stroke rate

[n/min]

Nominal width of

suction line

Maximum

length of

suction line

[m]

9.5 Optimum installation

Fig. 10 Example of optimum installation

9.6 Installation tips

• For easy deaeration of the dosing head, install a ball valve (11i) with bypass line (back to the dosing tank) immediately after the discharge valve.

• In the case of long discharge lines, install a non-return valve (12i) in the discharge line.

Fig. 11 Installation with ball valve and non-return valve

• When installing the suction line, observe the following:

– Keep the suction line as short as possible. Prevent it from

becoming tangled. – If necessary, use swept bends instead of elbows. – Always route the suction line up towards the suction valve. – Avoid loops which may cause air bubbles.

Fig. 12 Installation of suction line

• For non-degassing media with a viscosity similar to water, the pump can be mounted on the tank (observe the maximum suction lift).

• Flooded suction preferred.

• For media with a tendency to sedimentation, install the suction line with filter (13i) so that the suction valve remains a few millimetres above the possible level of sedimentation.

Fig. 13 Tank installation

• Note for suction-side installation: Depending on the dosing flow and the line length, it may be necessary to install a properly sized pulsation damper (4i) immediately before the pump suction valve.

Fig. 14 Installation with suction-side pulsation damper

• Note for discharge-side installation: Depending on the dosing flow and the line length, it may be necessary to install a properly sized pulsation damper (4i) on the discharge side.

TM03 6296 4506

10i

max. 1m

Max. 1 m

Pos. Components

1i Dosing tank 2i Electric agitator 3i Extraction device 4i Suction pulsation damper 5i Dosing pump 6i Relief valve 7i Pressure-loading valve 8i Pulsation damper 9i Measuring glass

10i Injection unit

TM03 6297 4506TM03 6298 4506

11i

12i

TM03 6299 4506

Note

Observe section 9.4 Approximate values when

using pulsation dampers and, if necessary,

request a system-specific calculation from our calculation program.

TM03 6300 4506

10i

13i

Fig. 15 Installation with discharge-side pulsation damper

• For degassing and viscous media: flooded suction.

• Install a filter in the suction line to prevent the valves from becoming choked.

• To protect the dosing pump and the discharge line against excessive pressure build-up, install a relief valve (6i) in the discharge line.

Fig. 16 Installation with relief valve

With open outflow of the dosing medium or a counterpressure below 2 bar

• Install a pressure-loading valve (7i) immediately before the outlet or the injection unit.

A positive pressure difference of at least 2 bar must be ensured between the counter-pressure at the injection point and the pressure of the dosing medium at the pump suction valve.

• If this cannot be ensured, install a pressure-loading valve (7i) in the discharge line.

Fig. 17 Installation with pressure-loading valve

• To avoid the siphon effect, install a pressure-loading valve (7i) in the discharge line and, if necessary, a solenoid valve (14i) in the suction line.

Fig. 18 Installation to avoid the siphon effect

9.7 Tube / pipe lines

9.7.1 General

9.8 Connecting the suction and discharge line s

• Connect the suction line to the suction valve.

– Install the suction line in the tank so that the foot valve

remains 5 to 10 mm above the bottom of the tank or the possible level of sedimentation.

• Connect the discharge line to the discharge valve.

Connection of hose lines

• Push the hose firmly on the connection nipple and, depending on the connection, secure using a connection counterpart or hose clip.

• Fit the gasket.

• Screw the hose on the valve using the union nut.

Fig. 19 Connection of hose lines

Note

To protect the system, use pulsation dampers (8i) for rigid piping longer than 2 metres and tubing longer than 3 metres, depending on pump type and size.

TM03 6301 4506

Caution

Risk of damage to the system! It is always recommended to use pulsation

dampers for large high-speed pumps! Since the pulsation is influenced by many

factors, a system-specific calculation is essential. Request a calculation from our calculation program.

TM03 6302 4506TM03 6303 4506

10i

p≥ 2 bar

p ≥ 1 bar

TM03 6304 4506

Warning To protect the dosing system against excessive

pressure build-up, install a relief valve in the discharge line.

Only use the prescribed line types! All lines must be free from strain! Avoid loops and buckles in the tubes! Keep the suction line as short as possible to

avoid cavitation! If necessary, use swept bends instead of elbows. Observe the chemical manufacturer's safety

instructions when handling chemicals! Make sure that the pump is suitable for the actual

dosing medium! The flow must run in the opposite direction to

gravity!

Caution

Warning All lines must be free from strain! Only use the prescribed line types!

TM03 6456 4506

14i

p2 - p

1 bar

p2-p1 ≥ 1 bar

Connection of DN 20 pipe lines

• Depending on the pipe material and connection, glue the pipe (PVC), weld it (PP, PVDF or stainless steel) or press it in (stainless steel).

• Fit the gasket.

• Screw the pipe on the valve using the union nut.

Fig. 20 Connection of DN 20 pipe lines

Connection of DN 32 pipe lines

• Depending on the pipe material, fit the pipe to the welding neck flange and weld it (stainless steel) or insert it into the headed bush and weld it (PP, PVDF).

Fig. 21 Connection of DN 32 pipe lines

9.8.1 Connecting a liquid-heated dosing head (optional)

As an option, liquid-heated dosing heads are available in stainless steel.

Fig. 22 Liquid-heated dosing head

Required characteristics of heating liquid:

• The heating liquid must not chemically attack stainless steel.

• Maximum permissible pressure: p

max.

= 3 bar.

• Maximum permissible temperature: t

max.

= 100 °C.

10. Electrical connections

Make sure that the pump is suitable for the electricity supply on which it will be used.

10.1 Electric servomotor (optional)

To connect the servomotor to the power supply, see the installation and operating instructions for the servomotor.

10.2 Electronic preselection counter (optional)

To connect the preselection counter to the power supply, see the installation and operating instructions for the counter.

10.3 Electrically heated dosing head (optional)

Fig. 23 Electrically heated dosing head

• To connect the temperature controller to the power supply, see the installation and operating instructions for the electric temperature controller.

Fig. 24 Temperature controller

TM03 6457 4506TM03 6458 4506TM03 6459 4506

Pos. Components

2f Dosing head, liquid-heated

2f1 Hose nipple, DN 10 connection

Ø10

2f1

Warning Electrical connections must only be carried out

by qualified personnel! Disconnect the power supply before connecting

the power supply cabl e and the rel ay co ntac ts! Observe the local safet y regu latio ns! The pump housing must only be opened by

personnel authorised by Grundfos Alldos! Protect the cable connections and plugs against

corrosion and humidity. Only remove the protective caps from the

sockets that are being used.

TM03 6460 4506

Pos. Component

2e Dosing head, electrically heated

TM03 6461 4506

Pos. Connections

2e1 Sensor 2e2 Heating 2e3 Power supply

2e1

2e2

2e3

10.4 Diaphragm controller (optional)

Fig. 25 Diaphragm controller

10.5 Connecting the power supply cable

• Do not switch on the power supply until you are ready to start the pump.

10.5.1 Versions with mains plug

• Insert the mains plug in the mains socket.

10.5.2 Versions without mains plug

• Connect the motor to the power supply in accordance with local electrical installation regulations and the connection chart on the terminal box cover.

11. Start-up / shutdown

11.1 Initial start-up / subsequent start-up

11.1.1 Checks before start-up

• Check that the rated voltage stated on the pump nameplate corresponds to the local conditions!

• Check that all connections are secure and tighten, if necessary.

• Check that the dosing head screws are tightened with the specified torque and tighten, if necessary.

• Check that all electrical connections are correct.

• Cross-tighten the dosing head screws using a torque wrench.

Torques

11.1.2 Oil filling

1. Slacken and remove the oil-filling screw (F).

2. Slowly add the hydraulic oil supplied with the pump through the oil-filling opening (F) until the oil reaches the mark on the oil dipstick.

3. Set the stroke-length adjustment knob (L) to "0".

Warning Explosion-proof pumps with diaphragm leakage

detection are fitted with a contact pressure gauge in explosion-proof version.

The pressure gauge must be earthed. Connecting the earth cable (4u), see fig. 25.

TM03 6453 4506

Pos. Com ponents

S Contact pressure gauge 5s Union nut 6s Contact output

T Ball non-return valve

U Connection piece 2u Deaeration screw 3u O-rings 4u Connection for earth cable 5u Union nut

* 2) or locking unit (instead of contact pressure gauge and its connection)

Warning Disconnect the power supply before connecting

the power supply cable! Before connecting the power supply cable, check

that the rated voltage stated on the pump nameplate corresponds to the local conditions!

Do not make any changes to the power supply cable or plug!

Caution

The assignment between the plug-and-socket connection and the pump must be labelled clearly (e.g. by labelling the socket outlet).

Caution

The pump can be automatically started by connecting the power supply!

Warning The pump must be connected to an external

clearly labelled mains switch with a minimum contact gap of 3 mm in all poles.

Warning The specified enclosure class can only be

ensured if the power supply cable is connected with the same degree of protection.

Caution

Observe the direction of rotation! To protect the motor, install a motor protecting

switch or motor contactor, and set the bimetal relay to the rated motor current for the available voltage and frequency.

Warning When dosing dangerous media, observe the

corresponding safety precautions! Wear protective clothing (gloves and goggles)

when working on the dosing head, connections or lines!

Before removing the dosing head, valves and lines, empty any remaining medium in the dosing head into a drip tray by carefully unscrewing the suction valve.

The pump housing must only be opened by personnel authorised by Grundfos Alldos!

Repairs must only be carried out by authorised and qualified personnel!

Caution

Observe the flow direction of valves (indicated by an arrow on the valve)!

Only tighten plastic valves by hand.

Pump type

Torque

[Nm]

DMH 251, 10 bar 8-10 DMH 251, 16 bar 10-12 DMH 251, 25 bar 13-15 DMH 252 8-10 DMH 253 10-12 DMH 254 50-54 DMH 255 50-54 DMH 257 50-54

Note

The pump is factory-checked, and the oil is drained for shipping purposes. Before start-up, add the special oil supplied with the pump.

The piston flange is filled with oil for easy startup. The stroke-length adjustment knob must only be adjusted if the gear oil has been added, otherwise the oil will leak from the piston flange.

11.1.3 Filling the dosing head for the initial start-up for systems without flooded suction

As assisting suction for systems without flooded suction, you can fill the dosing head with dosing medium before the initial start-up:

1. Unscrew the discharge valve (3b).

2. Add the dosing medium to the dosing head (2).

3. Screw the discharge valve (3b) back in.

11.2 Start-up / subsequen t start-up of DMH 251, 252

and 253

Fig. 26 Start-up of DMH 251, 252 and 253

1. Connect the electrical power supply.

2. Depending on the installation, start the pump, where possible,

without counter-pressure.

See installation example for easy deaeration of the dosing head in section

9. Installation.

3. Set the stroke-length adjustment knob (L) to 0 %.

4. Let the pump run for approx. 5 minutes.

5. Check the oil level.

– Set the stroke-length adjustment knob (L) to 40 %. – Let the pump run for approx. 10 minutes with a stroke-length

setting of 40 %.

– Switch off the pump, check the oil level and add oil,

if necessary.

– Refit the oil-filling screw (F).

6. Deaerate the piston flange.

– Set the stroke-length adjustment knob (L) to 15 %. – Loosen the degassing valve (E) by one turn to the left. – Let the pump run for approx. 5 minutes. – Re-tighten the degassing valve (E).

The pump is now ready for operation.

After start-up

Torques

11.3 Start-up / subs equent start-up of DMH 254, 255 and 257

Fig. 27 Start-up of DMH 254, 255 and 257

Warning When dosing dangerous media, observe the

corresponding safety precautions! Wear protective clothing (gloves and goggles)

when working on the dosing head, connections or lines!

Note

Observe the flow direction of the discharge valve (indicated by an arrow on the valve)!

TM03 6462 4506

Pos. Components

1q Dosing head screws

2 Dosing head

3b Discharge valve

E Degassing valve

F Oil-filling screw with dipstick

L Stroke-length adjustment knob 1l Cover for stroke-length adjustment knob M Pressure relief valve

M M1qE

Warning Risk of injury caused by squirting oil! Oil may squirt from the oil deaeration when the

pump is running. Do not completely unscrew the oil deaeration screw.

Wear protective clothing (gloves and goggles) when working on the dosing head, connections or lines!

Note

Rod length of oil dipstick: 27 mm. Immersion depth to marking: approx. 5 mm.

Note

Check the oil level at least every two weeks and add oil, if necessary.

Only use original Grundfos Alldos gear oil! For product number, see service instructions.

Pump type Version Description

DMH 251 Single/double

1.3 l white oil

(Paraffin 55 DAB7)

DMH 252, 10 bar Single/double

1.3 l white oil

(Paraffin 55 DAB7) DMH 252, 16 bar Single/double 1.3 l DHG 68 DMH 253 Single/double 1.3 l DHG 68

Caution

After initial start-up and after each time the diaphragm is changed, tighten the dosing head screws.

After approximately 6-10 operating hours or two days, cross-tighten the dosing head screws using a torque wrench.

Pump type

Torque

[Nm]

DMH 251, 10 bar 8-10 DMH 251, 16 bar 10-12 DMH 251, 25 bar 13-15 DMH 252 8-10 DMH 253 10-12

TM03 6463 4506

Pos. Components

1q Dosing head screws

2 Dosing head

3b Discharge valve

F Oil-filling screw with dipstick

L Stroke-length adjustment knob 1l Cover for stroke-length adjustment knob M Pressure relief valve

M M

1. Connect the electrical power supply.

2. Depending on the installation, start the pump, where possible, without counter-pressure.

See installation example for easy deaeration of the dosing head in section

9. Installation.

3. Set the stroke-length adjustment knob (L) to 0 %.

4. Let the pump run for approx. 5 minutes.

5. Check the oil level. – Set the stroke-length adjustment knob (L) to 40 %. – Let the pump run for approx. 10 minutes with a stroke-length

setting of 40 %.

– Switch off the pump, check the oil level and add oil,

if necessary.

– Refit the oil-filling screw (F).

The pump is now ready for operation.

After start-up

Torques

11.4 Setting the pressure relief valve

The pressure relief valve is set to the pressure given by the customer, or to the rated pressure (maximum counter-pressure). The opening pressure can be set to a lower value by the customer.

Opening pressure of the pressure relief valve

Setting the opening pressure

• To set the operating pressure, a pressure gauge must be installed in the discharge line and an isolating valve must be installed after the pressure gauge.

• To set the pressure relief valve, use a screwdriver.

Fig. 28 Setting the opening pressure

Set the pressure relief valve as follows:

1. Close the isolating valve after the pressure gauge.

2. Remove the cover (1m) from the pressure relief valve.

3. Start the pump.

4. Using a screwdriver, slowly turn the adjusting screw (2m) of the pressure relief valve counter-clockwise until the desired opening pressure is obtained.

Fig. 29 Setting the pressure relief valve

5. Replace the cover of the pressure relief valve.

6. Open the isolating valve after the pressure gauge.

Warning Risk of injury caused by squirting oil! Oil may squirt from the oil deaeration when the

pump is running. Do not completely unscrew the oil deaeration screw.

Wear protective clothing (gloves and goggles) when working on the dosing head, connections or lines!

Note

Rod length of oil dipstick: 35 mm. Immersion depth to marking: approx. 5 mm.

Note

Check the oil level at least every two weeks and add oil, if necessary.

Only use original Grundfos Alldos gear oil! For product number, see service instructions.

Pump type Version Description

DMH 254 Single 3.5 l DHG 68 DMH 254 Double 4.5 l DHG 68 DMH 255 Single 3.5 l DHG 68 DMH 255 Double 4.5 l DHG 68 DMH 257 Single 5.5 l DHG 68 DMH 257 Double 7.5 l DHG 68

Caution

After initial start-up and after each time the diaphragm is changed, tighten the dosing head screws.

After approximately 6-10 operating hours or two days, cross-tighten the dosing head screws using a torque wrench.

Pump type

Torque

[Nm]

DMH 254 50-54 DMH 255 50-54 DMH 257 50-54

Rated pressure of the pump

[bar]

Opening pressure of the

pressure relief valve

[bar]

45 10 13 16 18 25 28

TM03 6464 4506TM03 6465 4506

Caution

Risk of damage to the pump or system! When blocked, the pressure relief valve does not

work properly and can produce pressures of several hundred bar in the pump or system. Do not block the pressure relief valve during adjustments!

11.5 Zero point adjustments

11.5.1 Adjusting the zero point for system pressures up to 100 bar

The zero point of the dosing pump is factory-set to a slightly lower counter-pressure than the rated pressure of the pump. If the operating counter-pressure deviates considerably from this value, an adjustment of the zero point will ensure more precise values.

Counter-pressure at the factory-set zero point of the pump

11.5.2 Adjusting the zero point

Fig. 30

Adjusting the zero point

1. Fit a measuring device on the suction side, for instance place

the suction line in a graduated measuring beaker.

2. Set the dosing flow to 15 %.

3. Remove the cover (1l) from the stroke-length adjustment knob

(L).

4. Use a screwdriver to loosen the locking screw (2l) by

approximately 2 turns.

5. Switch on the pump.

6. Slowly turn the stroke-length adjustment knob towards the

zero point until the dosing (the liquid level falls) stops in the measuring device.

7. Switch off the pump.

8. Set the scale ring (4l) to zero.

– Loosen the screw (3l) in the scale ring (4l) slightly using an

hexagon key, M3.

– Turn the scale ring (4l) until both "0" are the same on the

scale and scale ring.

– Tighten the screw (3l).

9. Depending on the application, tighten the locking screw (2l) so that the stroke-length adjustment knob can still be turned/ cannot be turned any more.

10.Replace the cover (1l).

11.6 Operating the pump

11.7 Shutdown

11.7.1 Switching off / uninstalling

1. Switch off the pump and disconnect it from the power supply.

2. Depressurise the system.

3. Take suitable steps to ensure that the returning dosing medium is safely collected.

4. Carefully remove all lines.

5. Uninstall the pump.

11.7.2 Cleaning

1. Rinse all parts that have come into contact with the medium very carefully:

– lines – valves – dosing head – diaphragm.

2. Remove any trace of chemicals from the pump housing.

11.7.3 Storage

Storage of the pump:

1. After cleaning (see section

11.7.2 Cleaning), carefully dry all

parts and reinstall the dosing head and valves, or

2. change the valves and diaphragm.

See section

13. Maintenance.

11.7.4 Disposal

Disposal of the pump:

• After cleaning (see section

11.7.2 Cleaning), dispose of the

pump in accordance with the relevant regulations.

12. Operation

12.1 Switching on/off

• To start the pump, switch on the power supply.

• To stop the pump, switch off the power supply.

Rated pressure of the pump

[bar]

Counter-pressure at the

factory-set zero point

[bar]

10 3 16 3 25 10

TM03 6466 4506

Pos. Components

L Stroke-length adjustment knob 1l Cover 2l Locking screw 3l Screw 4l Scale ring

Warning When dosing dangerous media, observe the

corresponding safety precautions! Wear protective clothing (gloves and goggles)

when working on the dosing head, connections or lines!

Always adjust the value with the discharge line connected and with operating counter-pressure.

3l 2l 1l

Note

When operating the pump, see sections

12. Operation and 13. Maintenance and,

if necessary, section 14. Fault finding chart.

Warning Wear protective clothing (gloves and goggles)

when working on the dosing head, connections or lines!

Do not allow any chemicals to leak from the pump. Collect and dispose of all chemicals correctly!

Note

If possible, rinse the dosing head before shutting down the pump, e.g. by supplying it with water.

Caution

Before switching on the pump, check that it is installed correctly. See sections 9. Installation and 11. Start-up / shutdown.

12.2 Setting the dosing capacity

Fig. 31 Setting the dosing capacity

12.2.1 Setting the dosing flow and locking the stroke-length adjustment knob

1. Remove the cover (1l) from the stroke-length adjustment knob

(L).

2. Use a screwdriver to loosen the locking screw (2l) by

approximately 2 turns.

3. Increase or

reduce the dosing flow while the pump is running.

– Slowly turn the stroke-length adjustment knob to the left or

right to set the desired dosing volume.

4. Depending on the application, tighten the locking screw (2l) so

that the stroke-length adjustment knob can still be turned/ cannot be turned any more.

5. Replace the cover (1l).

12.3 Using the AR control unit (optional)

When using the AR control unit, observe the installation and operating instructions for the "AR control unit" in addition to the instructions in this manual.

12.4 Electric servomotor (optional)

To operate the servomotor, see the installation and operating instructions for the servomotor.

12.5 Electronic preselection counter (optional)

To operate the preselection counter, see the installation and operating instructions for the counter.

12.6 Electrically heated dosing head (optional)

To operate the temperature controller, see the installation and operating instructions for the temperature controller.

13. Maintenance

13.1 General notes

13.2 Diaphragm leakage control for diaphrag m leakage detection

If a diaphragm leakage (MLS) has been detected, first of all check whether an error has been displayed, as different external factors such as the heating of dosing or hydraulic medium can cause the cracked medium between the diaphragms to be displaced into the valve, thereby causing an error to occur.

Checks after a diaphragm leakage detection:

1. Briefly open the deaeration screw (2u) and then close it again.

2. Switch on the pump.

3. If, after a short period of time, a diaphragm leakage is

detected again, a diaphragm has broken.

Fig. 32 Dosing head with double diaphragm

TM03 6466 4506

Pos. Com ponents

L Stroke-length adjustment knob 1l Cover 2l Locking screw 3l Screw 4l Scale ring

Caution

The pump cannot be operated if the stroke-length adjustment knob is fully open! Depending on the pump adjustment, this value may already be lower than 100 % on the scale for system pressures higher than 100 bar.

Open the stroke-length adjustment knob completely and then close by approx. 10 % in order to set the dosing flow to 100 %.

3l 2l 1l

Warning When dosing dangerous media, observe the

corresponding safety precautions! Wear protective clothing (gloves and goggles)

when working on the dosing head, connections or lines!

The pump housing must only be opened by personnel authorised by Grundfos Alldos!

Repairs must only be carried out by authorised and qualified personnel!

Switch off the pump and disconnect it from the power supply before carrying out maintenance work and repairs!

Before removing the dosing head, valves and lines, empty any remaining medium in the dosing head into a drip tray by carefully unscrewing the suction valve.

Caution

Observe the flow direction of valves (indicated by an arrow on the valve)!

Only tighten plastic valves by hand.

Caution

After a diaphragm breakage, replace the diaphragms and clean the non-return valve, see section 13.7 Replacing the diaphragm for dosing

head with double diaphragm.

TM03 6467 4506

Pos. Compo nents

S Contact pressure gauge T Ball non-return valve

U Connection piece 1u Filling screw 2u Deaeration screw

13.3 Cleaning and maintenance intervals

Checking the oil level

• Check the oil level every two weeks and add oil, if necessary.

Cleaning the valves

• At least every 12 months or after 4,000 operating hours.

• If the pump does not perform.

• In the event of a fault. Clean the valves and replace, if necessary (for stainless-steel

valves: inner valve parts).

Changing diaphragms and gear oil

• At least every 12 months or after 8,000 operating hours, change the dosing medium and gear oil.

• In dusty installation sites, change the gear oil every 3,000 operating hours.

Cleaning the ball non-return valve of the double diaphragm

• After a diaphragm breakage, remove the ball non-return valve immediately and clean it.

13.4 Checking the oil level

13.5 Cleaning the suction and discharge valves

DN 8 valve

• Screwed connection 5/8"

• Stainless steel or plastic

• Spring-loaded (optional).

DN 20 valve (valve for suction side only), with adapter

• Screwed connection 1 1/4"

• Plastic.

DN 20 valve

• Screwed connection 1 1/4"

• Stainless steel or plastic

• Spring-loaded (optional).

DN 32 valve (for 60 Hz operation, suction side only), with adapter

• Flange connection

• Stainless steel or plastic.

Clean the suction and discharge valves as follows:

1. Unscrew the valves.

2. Unscrew the screw parts and valve set using round pliers.

3. Dismantle the inner part (seat, O-ring, balls, ball cages and, if present, spring).

4. Clean all parts. Replace faulty parts by new ones.

5. Re-assemble the valve.

6. Replace the O-rings by new ones. Refit the valve.

Fig. 33 Stainless-steel or plastic DN 8 valve, spring-loaded

as an option

Fig. 34 Plastic DN 20 valve

Fig. 35 Stainless-steel or plastic DN 20 valve, spring-loaded

as an option

Note

Only clean the ball non-return valve after a diaphragm breakage!

Caution

Check the oil level at least every two weeks and add oil, if necessary.

Note

Rod length of oil dipstick: DMH 251-253: 27 mm. DMH 254-257: 35 mm. Immersion depth to marking: approx. 5 mm.

Warning Wear protective clothing (gloves and goggles)

when working on the dosing head, connections or lines!

Before removing the dosing head, valves and lines, empty any remaining medium in the dosing head into a drip tray by carefully unscrewing the suction valve.

TM03 6468 4506TM03 6469 4506TM03 6470 4506

2)1)

Stainless

steel

Plastic

Fig. 36 DN 32 valve, suction side and discharge side

13.6 Replacing the diaphragm and gear oil for dosing head with single diaphragm (no diaphragm leakage detection)

13.6.1 Drain gear oil

Fig. 37

Drain gear oil

1. Unscrew the locking screw (B) and collect the gear oil in a container.

2. Screw the locking screw (B) and the new gasket (1b) back in and tighten securely.

13.6.2 Removing the dosing head

1. Close the suction and discharge lines and loosen the suction and discharge valve connections.

2. Loosen the six dosing head screws (1q with 2q).

3. Remove the dosing head (2).

13.6.3 Replacing a single diaphragm (no diaphragm leakage

detection)

• Remove the diaphragm and fit a new diaphragm (Q) on the suction side. See fig. 38.

Fig. 38 Replacing a single diaphragm

TM03 6471 4506

Caution

The O-rings must be correctly placed in the specified groove.

Observe the flow direction (indicated by an arrow on the valve)!

Only tighten plastic valves by hand.

Warning Wear protective clothing (gloves and goggles)

when working on the dosing head, connections or lines!

The dosing diaphragm should be replaced with each gear oil change.

Before removing the dosing head, valves and lines, empty any remaining medium in the dosing head into a drip tray by carefully unscrewing the suction valve.

Note

Only use original Grundfos Alldos gear oil! For product number, see service instructions.

Pump type Version Description

DMH 251 Single/double

1.3 l white oil

(Paraffin 55 DAB7)

DMH 252, 10 bar Single/double

1.3 l white oil

(Paraffin 55 DAB7) DMH 252, 16 bar Single/double 1.3 l DHG 68 DMH 253 Single/double 1.3 l DHG 68 DMH 254 Single 3.5 l DHG 68 DMH 254 Double 4.5 l DHG 68 DMH 255 Single 3.5 l DHG 68 DMH 255 Double 4.5 l DHG 68 DMH 257 Single 5.5 l DHG 68 DMH 257 Double 7.5 l DHG 68

Note

Collect the gear oil in a container and dispose of it correctly.

Discharge side

Suction side

TM03 6472 4506

Pos. Compo nents

B Locking screw

1b Gasket

F Oil-filling screw with dipstick L Stroke-length adjustment knob

Caution

Risk of leaking oil and damage caused by oil loss!

For each oil change, a new flat gasket (1b) must be fitted!

TM03 6473 4506

Pos. Compo nents

1q Dosing head screw 2q Intermediate disk

2 Dosing head Q Diaphragm

13.6.4 Fitting the dosing head

• Fit the dosing head and cross-tighten the dosing head screws (1q with 2q) using a torque wrench.

13.6.5 Filling with gear oil

1. Check that the locking screw (B) is tightened.

2. Slacken and remove the oil-filling screw (F).

3. Set the stroke-length adjustment knob (L) to "0".

4. Slowly add the hydraulic oil through the oil-filling opening (F) until the oil reaches the mark on the oil dipstick.

5. Wait 30 minutes.

6. Let the pump run for approx. 5 minutes with a stroke-length setting of 0 %.

7. Let the pump run for approx. 10 minutes with a stroke-length setting of 40 %.

13.6.6 Checking the oil level

1. Switch off the pump, check the oil level and add oil, if necessary.

2. Refit the oil-filling screw (F).

Torques

13.7 Replacing the diaphragm for dosing h ead with double diaphragm

13.7.1 Removing the dosing head

1. Close the suction and discharge lines and loosen the suction

and discharge valve connections.

2. Loosen the six dosing head screws (1q with 2q).

3. Remove the dosing head (2).

13.7.2 Replacing a double diaphragm

1. Clean the intermediate disk (3q), sealing rings (4q) and

covering rings (5q). After a diaphragm breakage, replace the parts by new ones.

2. Remove both clamping sleeves (6q) slightly using pliers.

After a diaphragm breakage, replace the parts by new ones.

3. Measure the outer wall thickness of both new diaphragms

(Q1 and Q2): s1

(Q1)

< s2

(Q2)

Fig. 39 Installation of diaphragm

1) The shape of the diaphragm varies depending on pump type.

4. Fit both new diaphragms (Q1 and Q2) and the parts (3q - 5q)

in the correct order, as is shown in the diagrams (the clamping sleeves (6q) are used for centring purposes).

Note

See section 11. Start-up / shutdown for subsequent start-up!

Caution

Risk of leaking oil and damage caused by oil loss!

For each oil change, a new flat gasket (1b) must be fitted!

Caution

After initial start-up and after each time the diaphragm is changed, tighten the dosing head screws.

After approximately 6-10 operating hours or two days, cross-tighten the dosing head screws using a torque wrench.

Pump type

Torque

[Nm]

DMH 251, 10 bar 8-10 DMH 251, 16 bar 10-12 DMH 251, 25 bar 13-15 DMH 252 8-10 DMH 253 10-12 DMH 254 50-54 DMH 255 50-54 DMH 257 50-54

Warning Wear protective clothing (gloves and goggles)

when working on the dosing head, connections or lines!

The dosing diaphragm should be replaced with each gear oil change.

Before removing the dosing head, valves and lines, empty any remaining medium in the dosing head into a drip tray by carefully unscrewing the suction valve.

Note

Only use original Grundfos Alldos gear oil! For product number, see service instructions.

TM03 6474 4506

Pos. Components

1q Dosing head screw 2q Intermediate disk

2 Dosing head

Q1/Q2

See fig. 40

3q - 5q

Caution

Observe correct installation of diaphragms (Q1 and Q2)! See fig. 40.

Fit the thinner diaphragm (Q1) on the dosing side and the thicker diaphragm (Q2) on the oil side/ pump side!

3q - 5q Q2Q1

s1 < s

Fig. 40 Diaphragm on dosing-head side

13.7.3 Fitting the dosing head

• Fit the dosing head and cross-tighten the dosing head screws using a torque wrench.

13.7.4 Filling the double diaphragm with separating agent

Pump with double diaphragm: After the diaphragm has been replaced, refill the separating agent between the diaphragms.

Fig. 41 Dosing head with double diaphragm

1. Set the stroke-length adjustment knob of the pump to 0 %.

2. Open the filling screw (1u) and deaeration screw (2u) by one turn.

3. Connect the filling hose to the nipple of the filling screw (1u) and, using the dosing syringe, inject the correct amount of paraffin oil that is specified in the table below.

4. Close the filling screw (1u), but leave the deaeration screw (2u) open.

5. Start the pump with a system counter-pressure and strokelength setting of 40 %.

6. Only close the deaeration screw (2u) when the separating agent stops flowing (after 5 to 10 minutes).

Quantity of paraffin oil required for dosing pumps with a double diaphragm (per do sing head)

For ordering data for double-diaphragm filling components, see service instructions.

TM03 6475 4506

Pos. Com ponents

S Contact pressure gauge (installation position) Q1 Diaphragm on dosing-head side Q2 Diaphragm on oil side/pump side

3q Intermediate disk 4q Sealing rings 5q Covering rings 6q Clamping sleeves

Caution

The paraffin oil between the diaphragms (Q) is connected via the clamping sleeves (6q) to the contact pressure gauge (S) in order to fill and activate the diaphragm leakage detection. The oil is able to pass between the diaphragms through the slits in the clamping sleeves and the slits in the intermediate disk.

The clamping sleeves (6q) must therefore be installed in such a way that the slits in the clamping sleeve face the slits in the intermediate disk (3q). See fig. 40.

Note

See section 11. Start-up / shutdown for subsequent start-up!

Caution

After a diaphragm has broken, the ball non-return valve must be cleaned before the diaphragm is filled with separating agent. Only clean the ball non-return valve after a diaphragm breakage!

2 5q4q3q4q5q Q2Q1

TM03 6467 4506

Pos. Compo nents

S Contact pressure gauge T Ball non-return valve

U Connection piece 1u Filling screw 2u Deaeration screw

Note

After a few operating hours, especially if the pressure of the pressure gauge is increasing, deaerate the double diaphragm again.

Pump type

Filling quantity

[ml]

DMH 251-253 4 DMH 254 6 DMH 255 8 DMH 257 10

13.7.5 Filling with gear oil

1. Check that the locking screw (B) is tightened.

2. Slacken and remove the oil-filling screw (F).

3. Set the stroke-length adjustment knob (L) to "0".

4. Slowly add the hydraulic oil through the oil-filling opening (F) until the oil reaches the mark on the oil dipstick.

5. Wait 30 minutes.

6. Let the pump run for approx. 5 minutes with a stroke-length setting of 0 %.

7. Let the pump run for approx. 10 minutes with a stroke-length setting of 40 %.

13.7.6 Checking the oil level

1. Switch off the pump, check the oil level and add oil, if necessary.

2. Refit the oil-filling screw (F).

Torques

13.7.7 Cleaning the ball non-return valve

Fig. 42

Contact pressure gauge

Removing the ball non-return valve and contact pressure gauge

1. For pumps and pressure gauges in explosion-proof version, unscrew the earth cable (4u).

2. Hold the connection piece (U) with a screwdriver and unscrew the union nut (5u).

3. Unscrew the ball non-return valve (T) from the dosing head.

Cleaning the ball non-return valve

Fig. 43

Ball non-return valve

1. Unscrew the screw part (t6) using round pliers.

2. Clean all parts. Replace faulty parts by new ones.

3. Re-assemble the ball non-return valve.

4. Refit the ball non-return valve (T).

5. Screw the contact pressure gauge (S) and connection piece (U) back on.

6. For pumps and pressure gauges in explosion-proof version, screw the earth cable (4u) back on.

Caution

Risk of leaking oil and damage caused by oil loss!

For each oil change, a new flat gasket (1b) must be fitted!

Caution

After initial start-up and after each time the diaphragm is changed, tighten the dosing head screws.

After approximately 6-10 operating hours or two days, cross-tighten the dosing head screws using a torque wrench.

Pump type

Torque

[Nm]

DMH 251, 10 bar 8-10 DMH 251, 16 bar 10-12 DMH 251, 25 bar 13-15 DMH 252 8-10 DMH 253 10-12 DMH 254 50-54 DMH 255 50-54 DMH 257 50-54

Note

Only clean the ball non-return valve after a diaphragm breakage!

TM03 6453 4506

Pos. Components

S Contact pressure gauge 5s Union nut 6s Contact output

T Ball non-return valve

U Connection piece 2u Deaeration screw 3u O-rings 4u Connection for earth cable 5u Union nut

* 2) or locking unit (instead of contact pressure gauge and its connection)

TM03 6476 4506

Pos. Components

t1 O-ring t2 Ball non-return valve body t3 Ball t4 Spring sheath t5 Pressure spring t6 Screw part t7 O-ring

Caution

Tighten the ball non-return valve and connection piece by hand only.

t6 t5

t3 t1

14. Fault finding chart

Warning Actions that are taken to correct faults on the pump and that are not described in this manual, must only be carried

out by personnel authorised by Grundfos Alldos!

Fault Diagnosis Cause Remedy

No dosing flow even at a low counter-pressure. (Pump is running without any noise).

No motor sound or vibrations. Fan is not rotating.

Motor is not running.

Connect the power supply or replace the motor, if blown.

When the oil-filling screw (F) is removed, use the dipstick to observe a calm oil surface. There is no "sloshing".

Motor runs, but the eccentric shaft is not rotating. No piston movement. Spiral pin or motor shaft broken.

Remove the motor and eccentric shaft. Replace damaged parts.

Oil level too low. See oil dipstick (F). No reaction of the overpressure valve if the suction line is closed.

Not enough oil in the pump. Air is penetrating the piston flange through the control holes.

Fill in oil. Deaerate the pump, see section

11. Start-up / shutdown.

No dosing flow on the discharge side.

Dosing head is not filled. Suction line empty. Tank empty.

Deaerate the dosing head. Fill/exchange the tank on the suction side.

No dosing flow even at a low counter-pressure. (Pump is running noisily although the overpressure valve reacted).

The overpressure valve reacts independently of the dosing flow adjustment (10 % to 100 %).

Valve on discharge side closed. Open the valve.

Counter-pressure is higher than the adjusted pressure at the overpressure valve.

Adjust the overpressure valve higher, but only if the pump is designed for this. Never block the overpressure valve.

Discharge valve is installed in the opposite direction of the flow. Observe the arrow on the valve.

Install the discharge valve correctly.

The diaphragm protection system (AMS) responds. The overpressure valve reacts independently of the dosing flow adjustment (10 % to 100 %).

Valve on suction side closed. Open the valve.

Suction filter obstructed.

Clean the suction filter. Replace, if necessary.

Suction valve jammed (does not open).

Dismantle and check the suction valve.

Suction valve has a too strong spring.

Use the fitting spring, or use double ball valve for checking.

Suction valve is installed in the opposite direction of the flow. Observe the arrow on the valve.

Install the suction valve correctly.

The diaphragm protection system (AMS) responds. The overpressure valve reacts at 100 % dosing flow. When reducing the flow ~10 % to 20 %, the overpressure valve does not react any more.

Dosing head is not completely deaerated.

Fill the dosing head completely.

Pump is cavitating (dosing liquid with too high viscosity; dosing liquid with too high steam pressure at operating temperature = degassing of the liquid; suction lift too high; wrong design of the system on suction side).

Use a gear with a low stroke number; use valves with bigger nominal width; realise positive inlet pressure.

Diaphragm broken (not enough oil in the enclosure of the pump; piston flange).

Clean and grease well all parts using oil according to regulations. Then install a new diaphragm.

Pump does not dose or pressure relief valve opens.

Discharge valve of pump is clogged or ball guide in the valve is worn due to corrosive or abrasive media.

Uninstall the discharge valve. Dismantle and clean, or if the bars of the ball guide are worn, replace the valve.

Dosing flow too small.

Suction valve: During the discharge stroke, the dosing liquid flows back into the suction line. Discharge valve: During the suction stroke, the dosing liquid flows back into the dosing head. The pump takes in less.

Suction/discharge valves dirty or leaky. Clean or replace valves.

Dosing flow depends very much on the pressure. If the counter-pressure is low, the dosing flow increases considerably. If the stroke frequency rises, the dosing flow increases excessively.

Too much clearance between piston and slide valve, or the stroke frequency of the pump is too low (too much slip).

Replace the piston and piston slide valves. Use other hydraulic oil with a higher viscosity (mainly for frequency converter operation and higher counter-pressures).

Pressure gauge in discharge line.

Counter-pressure has seriously increased. Overpressure valve is adjusted too low.

Readjust the zero point. Correct the setting of the pressure relief valve.

Especially at stroke frequencies below 15 strokes/min., e.g. frequency converter operation.

Degassing valve (M) is not working properly.

Replace the degassing valve (M) or, if necessary, replace with

∅8

ball.

Pump doses too much.

Pressure gauge in discharge line.

Counter-pressure has seriously dropped.

Readjust the zero point.

Heavy overdose.

Inlet pressure of suction line higher than counter-pressure of discharge line.

Install a pressure-loading valve.

Overdosing at high dosing flow settings and flows.

Too big dynamic in the suction line.

Install a pulsation damper on the suction side.

Fault Diagnosis Cause Remedy

15. Dosing curves

The dosing curves on the following pages are trend curves. They apply to:

• performance of single pump (the flow rate is doubled for the double pump)

• water as dosing medium

• zero point of pump Q

for specified pressure, see table below

• standard pump version.

DMH 251

Fig. 44

DMH 5-10 (50 Hz), Q0 = 3 bar

Fig. 45 DMH 5-10 (60 Hz), Q

= 3 bar

Fig. 46 DMH 13-10 (50 Hz), Q

= 3 bar

Fig. 47 DMH 13-10 (60 Hz), Q

= 3 bar

Fig. 48 DMH 19-10 (50 Hz), Q

= 3 bar

Fig. 49 DMH 19-10 (60 Hz), Q

= 3 bar

Fig. 50 DMH 24-10 (50 Hz), Q

= 3 bar

Abbreviation Description

Q Dosing flow Q

Zero point of the pump

h Stroke length

TM03 6477 4506TM03 6478 4506TM03 6479 4506

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

TM03 6480 4506TM03 6481 4506TM03 6482 4506TM03 6483 4506

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

()

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

Fig. 51 DMH 4.9-16 (50 Hz), Q

= 10 bar

Fig. 52 DMH 4.9-16 (60 Hz), Q

= 10 bar

Fig. 53 DMH 12-16 (50 Hz), Q

= 10 bar

Fig. 54 DMH 12-16 (60 Hz), Q

= 10 bar

Fig. 55 DMH 18-16 (50 Hz), Q

= 10 bar

Fig. 56 DMH 18-16 (60 Hz), Q

= 10 bar

Fig. 57 DMH 23-16 (50 Hz), Q

= 10 bar

Fig. 58 DMH 23-16 (60 Hz), Q

= 10 bar

TM03 6484 4506TM03 6485 4506TM03 6486 4506TM03 6487 4506

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar 16bar

10 bar 16 bar 3 bar

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar 16bar

10 bar 16 bar 3 bar

()

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

TM03 6488 4506TM03 6489 4506TM03 6490 4506TM03 6491 4506

()

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar 16bar

10 bar 16 bar 3 bar

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar 16bar

10 bar 16 bar 3 bar

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar 3bar

10 bar 16 bar 3 bar

()

0 102030405060708090100

h [%]

Q [l/h]

180bar 200bar 150bar

180 bar 200 bar 150 bar

Fig. 59 DMH 4.5-25 (50 Hz), Q

= 20 bar

Fig. 60 DMH 4.5-25 (60 Hz), Q

= 20 bar

Fig. 61 DMH 11-25 (50 Hz), Q

= 20 bar

Fig. 62 DMH 11-25 (60 Hz), Q

= 20 bar

Fig. 63 DMH 17-25 (50 Hz), Q

= 20 bar

Fig. 64 DMH 17-25 (60 Hz), Q

= 20 bar

Fig. 65 DMH 21-25 (50 Hz), Q

= 20 bar

TM03 6492 4506TM03 6493 4506TM03 6494 4506TM03 6495 4506

0 102030405060708090100

h [ % ]

Q [l/h]

20bar 25bar 10bar

20 bar 25 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

20bar 25bar 10bar

20 bar 25 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

20bar 25bar 10bar

20 bar 25 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

25bar 20bar 10bar

20 bar 25 bar 10 bar

TM03 6496 4506TM03 6497 4506TM03 6498 4506

0 102030405060708090100

h [%]

Q [l/h]

20bar 25bar 10bar

20 bar 25 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

20bar 25bar 10bar

20 bar 25 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

20bar 25bar 10bar

20 bar 25 bar 10 bar

DMH 252

Fig. 66

DMH 11-10 (50 Hz), Q0 = 3 bar

Fig. 67 DMH 11-10 (60 Hz), Q

= 3 bar

Fig. 68 DMH 24-10 (50 Hz), Q

= 3 bar

Fig. 69 DMH 24-10 (60 Hz), Q

= 3 bar

Fig. 70 DMH 37-10 (50 Hz), Q

= 3 bar

Fig. 71 DMH 37-10 (60 Hz), Q

= 3 bar

Fig. 72 DMH 46-10 (50 Hz), Q

= 3 bar

Fig. 73 DMH 10-16 (50 Hz), Q

= 10 bar

TM03 6499 4506TM03 6500 4506TM03 6501 4506TM03 6502 4506

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

()

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

TM03 6503 4506TM03 6504 4506TM03 6505 4506TM03 6506 4506

()

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

Fig. 74 DMH 10-16 (60 Hz), Q

= 10 bar

Fig. 75 DMH 23-16 (50 Hz), Q

= 10 bar

Fig. 76 DMH 23-16 (60 Hz), Q

= 10 bar

Fig. 77 DMH 36-16 (50 Hz), Q

= 10 bar

Fig. 78 DMH 36-16 (60 Hz), Q

= 10 bar

Fig. 79 DMH 45-16 (50 Hz), Q

= 10 bar

Fig. 80 DMH 45-16 (60 Hz), Q

= 10 bar

Fig. 81 DMH 54-16 (50 Hz), Q

= 10 bar

TM03 6507 4506TM03 6508 4506TM03 6509 4506TM03 6510 4506

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

()

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

TM03 6511 4506TM03 6512 4506TM03 6513 4506TM03 6514 4506

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

0 102030405060708090100

h [%]

Q [l/h]

16bar 10bar

10 bar 16 bar

DMH 253

Fig. 82

DMH 21-10 (50 Hz), Q0 = 3 bar

Fig. 83 DMH 21-10 (60 Hz), Q

= 3 bar

Fig. 84 DMH 43-10 (50 Hz), Q

= 3 bar

Fig. 85 DMH 43-10 (60 Hz), Q

= 3 bar

Fig. 86 DMH 67-10 (50 Hz), Q

= 3 bar

Fig. 87 DMH 67-10 (60 Hz), Q

= 3 bar

Fig. 88 DMH 83-10 (50 Hz), Q

= 3 bar

Fig. 89 DMH 83-10 (60 Hz), Q

= 3 bar

TM03 6515 4506TM03 6516 4506TM03 6517 4506TM03 6518 4506

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

TM03 6519 4506TM03 6520 4506TM03 6521 4506TM03 6522 4506

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

120

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

120

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

Fig. 90 DMH 100-10 (50 Hz), Q

= 3 bar

TM03 6523 4506

100

120

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

DMH 254

Fig. 91

DMH 102-10 (50 Hz), Q0 = 3 bar

Fig. 92 DMH 102-10 (60 Hz), Q

= 3 bar

Fig. 93 DMH 143-10 (50 Hz), Q

= 3 bar

Fig. 94 DMH 143-10 (60 Hz), Q

= 3 bar

Fig. 95 DMH 175-10 (50 Hz), Q

= 3 bar

Fig. 96 DMH 175-10 (60 Hz), Q

= 3 bar

Fig. 97 DMH 213-10 (50 Hz), Q

= 3 bar

Fig. 98 DMH 213-10 (60 Hz), Q

= 3 bar

TM03 6524 4506TM03 6525 4506TM03 6526 4506TM03 6527 4506

100

120

140

160

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

120

140

160

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

120

140

160

180

200

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

120

140

160

180

200

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

TM03 6528 4506TM03 6529 4506TM03 6530 4506TM03 6531 4506

100

150

200

250

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

150

200

250

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

150

200

250

300

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

150

200

250

300

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

Fig. 99 DMH 291-10 (50 Hz), Q

= 3 bar

Fig. 100 DMH 97-16 (50 Hz), Q

= 10 bar

Fig. 101 DMH 97-16 (60 Hz), Q

= 10 bar

Fig. 102 DMH 136-16 (50 Hz), Q

= 10 bar

Fig. 103 DMH 136-16 (60 Hz), Q

= 10 bar

Fig. 104 DMH 166-16 (50 Hz), Q

= 10 bar

Fig. 105 DMH 166-16 (60 Hz), Q

= 10 bar

Fig. 106 DMH 202-16 (50 Hz), Q

= 10 bar

TM03 6532 4506TM03 6533 4506TM03 6534 4506TM03 6535 4506

100

150

200

250

300

350

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

120

140

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

100

120

140

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

100

120

140

160

180

200

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

TM03 6536 4506TM03 6537 4506TM03 6538 4506TM03 6539 4506

100

120

140

160

180

200

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

100

150

200

250

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

100

150

200

250

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

120

160

200

240

280

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

Fig. 107 DMH 202-16 (60 Hz), Q

= 10 bar

Fig. 108 DMH 276-16 (50 Hz), Q

= 10 bar

TM03 6540 4506TM03 6541 4506

120

160

200

240

280

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

120

160

200

240

280

320

0 102030405060708090100

h [%]

Q [l/h]

10bar 16bar

10 bar 16 bar

DMH 255

Fig. 109

DMH 194-10 (50 Hz), Q0 = 3 bar

Fig. 110 DMH 194-10 (60 Hz), Q

= 3 bar

Fig. 111 DMH 270-10 (50 Hz), Q

= 3 bar

Fig. 112 DMH 270-10 (60 Hz), Q

= 3 bar

Fig. 113 DMH 332-10 (50 Hz), Q

= 3 bar

Fig. 114 DMH 332-10 (60 Hz), Q

= 3 bar

Fig. 115 DMH 403-10 (50 Hz), Q

= 3 bar

Fig. 116 DMH 403-10 (60 Hz), Q

= 3 bar

TM03 6542 4506TM03 6543 4506TM03 6544 4506TM03 6545 4506

100

150

200

250

300

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

150

200

250

300

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

200

300

400

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

200

300

400

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

TM03 6546 4506TM03 6547 4506TM03 6548 4506TM03 6549 4506

100

150

200

250

300

350

400

450

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

150

200

250

300

350

400

450

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

100

200

300

400

500

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

200

300

400

500

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

Fig. 117 DMH 550-10 (50 Hz), Q

= 3 bar

TM03 6550 4506

100

200

300

400

500

600

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

DMH 257

Fig. 118

DMH 220-10 (50 Hz), Q0 = 3 bar

Fig. 119 DMH 220-10 (60 Hz), Q

= 3 bar

Fig. 120 DMH 440-10 (50 Hz), Q

= 3 bar

Fig. 121 DMH 440-10 (60 Hz), Q

= 3 bar

Fig. 122 DMH 575-10 (50 Hz), Q

= 3 bar

Fig. 123 DMH 575-10 (60 Hz), Q

= 3 bar

Fig. 124 DMH 750-4 (50 Hz), Q

= 3 bar

Fig. 125 DMH 750-4 (60 Hz), Q

= 3 bar

TM03 6551 4506TM03 6552 4506TM03 6553 4506TM03 6554 4506

100

200

300

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

100

200

300

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

100

200

300

400

500

600

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

100

200

300

400

500

600

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

TM03 6555 4506TM03 6556 4506TM03 6557 4506TM03 6558 4506

100

200

300

400

500

600

700

800

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

100

200

300

400

500

600

700

800

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

200

400

600

800

1.000

0 102030405060708090100

h [%]

Q [l/h]

2bar 4bar

4 bar 2 bar

200

400

600

800

1.000

0 102030405060708090100

h [%]

Q [l/h]

1,5bar 4bar

4 bar

1.5 bar

Fig. 126 DMH 770-10 (50 Hz), Q

= 3 bar

Fig. 127 DMH 770-10 (60 Hz), Q

= 3 bar

Fig. 128 DMH 880-10 (50 Hz), Q

= 3 bar

Fig. 129 DMH 880-10 (60 Hz), Q

= 3 bar

Fig. 130 DMH 1150-10 (50 Hz), Q

= 3 bar

Fig. 131 DMH 1500-4 (50 Hz), Q

= 3 bar

16. Disposal

This product or parts of it must be disposed of in an environmentally sound way:

1. Use appropriate waste collection services.

2. If this is not possible, contact the nearest Grundfos or Grundfos Alldos company or service workshop.

TM03 6559 4506TM03 6560 4506TM03 6561 4506TM03 6562 4506

100

200

300

400

500

600

700

800

900

1000

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

100

200

300

400

500

600

700

800

900

1000

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

200

400

600

800

1000

1200

0 102030405060708090100

h [%]

Q [l/h]

3bar 10bar

3 bar 10 bar

200

400

600

800

1000

1200

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

TM03 6563 4506TM03 6564 4506

200

400

600

800

1000

1200

1400

0 102030405060708090100

h [%]

Q [l/h]

10bar 3bar

3 bar 10 bar

()

200

400

600

800

1.000

1.200

1.400

1.600

1.800

2.000

0 102030405060708090100

h [%]

Q [l/h]

2bar 4bar

4 bar 2 bar

Subject to alterations.

Safety declaration

Please copy, fill in and sign this sheet and attach it to the pump returned for service.

We hereby declare that this product is free from hazardous chemicals, biological and radioactive

substances:

Product type: ________________________________

Model number: _____________________________

No media or water: _____________________________

A chemical solution, name: _________________________

(see pump nameplate)

Fault description

Please make a circle around the damaged part.

In the case of an electrical or functional fault, please mark the cabinet.

Please give a short description of the fault:

_____________________ _____________________ Date and signature Company stamp

GrA3467

Argentina

Bombas GRUNDFOS de Argentina S.A. Ruta Panamericana km. 37.500 Lote 34A 1619 - Garin Pcia. de Buenos Aires Phone: +54-3327 414 444 Telefax: +54-3327 411 111

Australia Grundfos Alldos Dosing & Disinfection

ALLDOS Oceania Pty. Ltd. Unit 3 / 74 Murdoch Circuit Acacia Ridge QLD 4100 Phone: +61 (0)7 3712 6888 Telefax: +61 (0)7 3272 5188 E-mail: alldos.au@alldos.com

Australia

GRUNDFOS Pumps Pty. Ltd. P.O. Box 2040 Regency Park South Australia 5942 Phone: +61-8-8461-4611 Telefax: +61-8-8340 0155

Austria

GRUNDFOS Pumpen Vertrieb Ges.m.b.H. Grundfosstraße 2 A-5082 Grödig/Salzburg Tel.: +43-6246-883-0 Telefax: +43-6246-883-30

Belgium

N.V. GRUNDFOS Bellux S.A. Boomsesteenweg 81-83 B-2630 Aartselaar Tél.: +32-3-870 7300 Télécopie: +32-3-870 7301

Belorussia

Представительство ГРУНДФОС в Минске 220090 Минск ул.Олешева 14

Теле фон : (8632) 62-40-49 Факс: (8632) 62-40-49

Bosnia/Herzegovina

GRUNDFOS Sarajevo Paromlinska br. 16, BiH-71000 Sarajevo Phone: +387 33 713290 Telefax: +387 33 231795

Brazil

Mark GRUNDFOS Ltda. Av. Humberto de Alencar Castelo Branco, 630 CEP 09850 - 300 São Bernardo do Campo - SP Phone: +55-11 4393 5533 Telefax: +55-11 4343 5015

Bulgaria

GRUNDFOS Pumpen Vertrieb Representative Office - Bulgaria Bulgaria, 1421 Sofia Lozenetz District 105-107 Arsenalski blvd. Phone: +359 2963 3820, 2963 5653 Telefax: +359 2963 1305

Canada

GRUNDFOS Canada Inc. 2941 Brighton Road Oakville, Ontario L6H 6C9 Phone: +1-905 829 9533 Telefax: +1-905 829 9512

China Grundfos Alldos Dosing & Disinfection

ALLDOS (Shanghai) Water Technology Co. Ltd. West Unit, 1 Floor, No. 2 Building (T 4-2) 278 Jinhu Road, Jin Qiao Export Processing Zone Pudong New Area Shanghai, 201206 Phone: +86 21 5055 1012 Telefax: +86 21 5032 0596 E-mail: alldos.cn@alldos.com

China

GRUNDFOS Pumps (Shanghai) Co. Ltd. 22 Floor, Xin Hua Lian Building 755-775 Huai Hai Rd, (M) Shanghai 200020 PRC Phone: +86-512-67 61 11 80 Telefax: +86-512-67 61 81 67

Croatia

GRUNDFOS predstavništvo Zagreb Cebini 37, Buzin HR-10000 Zagreb Phone: +385 1 6595 400 Telefax: +385 1 6595 499

Czech Republic

GRUNDFOS s.r.o. Čapkovského 21 779 00 Olomouc Phone: +420-585-716 111 Telefax: +420-585-716 299

Denmark

GRUNDFOS DK A/S Martin Bachs Vej 3 DK-8850 Bjerringbro Tlf.: +45-87 50 50 50 Telefax: +45-87 50 51 51 E-mail: info_GDK@grundfos.com www.grundfos.com/DK

Estonia

GRUNDFOS Pumps Eesti OÜ Peterburi tee 92G 11415 Tallinn Tel: + 372 606 1690 Fax: + 372 606 1691

Finland

OY GRUNDFOS Pumput AB Mestarintie 11 FIN-01730 Vantaa Phone: +358-3066 5650 Telefax: +358-3066 56550

France Grundfos Alldos Dosing & Disinfection

ALLDOS S.A.R.L. 7, rue Gutenberg F-67610 La Wantzenau Tél.: +33-3 88 59 26 26 Télécopie: +33-3 88 59 26 00 E-mail : alldos.fr@alldos.com

France

Pompes GRUNDFOS Distribution S.A. Parc d’Activités de Chesnes 57, rue de Malacombe F-38290 St. Quentin Fallavier (Lyon) Tél.: +33-4 74 82 15 15 Télécopie: +33-4 74 94 10 51

Germany Grundfos Alldos Dosing & Disinfection

ALLDOS Eichler GmbH Reetzstraße 85 D-76327 Pfinztal (Söllingen) Tel.: +49 7240 61-0 Telefax: +49 7240 61-177 E-mail: alldos.de@alldos.com

Germany

GRUNDFOS GMBH Schlüterstr. 33 D-40699 Erkrath Tel.: +49-(0) 211 929 69-0 Telefax: +49-(0) 211 929 69-3799 E-mail: infoservice@grundfos.de Service in Deutschland: E-mail: kundendienst@grundfos.de

Greece

GRUNDFOS Hellas A.E.B.E. 20th km. Athinon-Markopoulou Av. P.O. Bo x 71 GR-19002 Peania Phone: +0030-210-66 83 400 Telefax: +0030-210-66 46 273

Hong Kong

GRUNDFOS Pumps (Hong Kong) Ltd. Unit 1, Ground floor Siu Wai Industrial Centre 29-33 Wing Hong Street & 68 King Lam Street, Cheung Sha Wan Kowloon Phone: +852-27861706 / 27861741 Telefax: +852-27858664

Hungary

GRUNDFOS Hungária Kft. Park u. 8 H-2045 Törökbálint, Phone: +36-23 511 110 Telefax: +36-23 511 111

India

GRUNDFOS Pumps India Private Limited 118 Old Mahabalipuram Road Thoraipakkam Chennai 600 096 Phone: +91-44 2496 6800

Indonesia

PT GRUNDFOS Pompa Jl. Rawa Sumur III, Blok III / CC-1 Kawasan Industri, Pulogadung Jakarta 13930 Phone: +62-21-460 6909 Telefax: +62-21-460 6910 / 460 6901

Ireland

GRUNDFOS (Ireland) Ltd. Unit A, Merrywell Business Park Ballymount Road Lower Dublin 12 Phone: +353-1-4089 800 Telefax: +353-1-4089 830

Italy

GRUNDFOS Pompe Italia S.r.l. Via Gran Sasso 4 I-20060 Truccazzano (Milano) Tel.: +39-02-95838112 Telefax: +39-02-95309290 / 95838461

Japan

GRUNDFOS Pumps K.K. Gotanda Metalion Bldg. 5F, 5-21-15, Higashi-gotanda Shiagawa-ku, Tokyo, 141-0022 Japan Phone: +81 35 448 1391 Telefax: +81 35 448 9619

Korea

GRUNDFOS Pumps Korea Ltd. 6th Floor, Aju Building 679-5 Yeoksam-dong, Kangnam-ku, 135-916 Seoul, Korea Phone: +82-2-5317 600 Telefax: +82-2-5633 725

Latvia

SIA GRUNDFOS Pumps Latvia Deglava biznesa centrs Augusta Deglava ielā 60, LV-1035, Rīga, Tālr.: + 371 714 9640, 7 149 641 Fakss: + 371 914 9646

Lithuania

GRUNDFOS Pumps UAB Smolensko g. 6 LT-03201 Vilnius Tel: + 370 52 395 430 Fax: + 370 52 395 431

Malaysia

GRUNDFOS Pumps Sdn. Bhd. 7 Jalan Peguam U1/25 Glenmarie Industrial Park 40150 Shah Alam Selangor Phone: +60-3-5569 2922 Telefax: +60-3-5569 2866

México

Bombas GRUNDFOS de México S.A. de C.V. Boulevard TLC No. 15 Parque Industrial Stiva Aeropuerto Apodaca, N.L. 66600 Phone: +52-81-8144 4000 Telefax: +52-81-8144 4010

Netherlands Grundfos Alldos Dosing & Disinfection

ALLDOS BV Leerlooiersstraat 6 NL-8601 WK Sneek Tel.: +31-51 54 25 789 Telefax: +31-51 54 30 550 E-mail: alldos.nl@alldos.com

Netherlands

GRUNDFOS Netherlands Veluwezoom 35 1326 AE Almere Postbus 22015 1302 CA ALMERE Tel.: +31-88-478 6336 Telefax: +31-88-478 6332 e-mail: i nfo_gnl@grundfos.com

New Zealand

GRUNDFOS Pumps NZ Ltd. 17 Beatrice Tinsley Crescent North Harbour Industrial Estate Albany, Auckland Phone: +64-9-415 3240 Telefax: +64-9-415 3250

Norway

GRUNDFOS Pumper A/S Strømsveien 344 Postboks 235, Leirdal N-1011 Oslo Tlf.: +47-22 90 47 00 Telefax: +47-22 32 21 50

Poland

GRUNDFOS Pompy Sp. z o.o. ul. Klonowa 23 Baranowo k. Poznania PL-62-081 Przeźmierowo Tel: (+48-61) 650 13 00 Fax: (+48-61) 650 13 50

Portugal

Bombas GRUNDFOS Portugal, S.A. Rua Calvet de Magalhães, 241 Apartado 1079 P-2770-153 Paço de Arcos Tel.: +351-21-440 76 00 Telefax: +351-21-440 76 90

România

GRUNDFOS Pompe România SRL Bd. Biruintei, nr 103 Pantelimon county Ilfov Phone: +40 21 200 4100 Telefax: +40 21 200 4101 E-mail: romania@grundfos.ro

Russia

ООО Гру ндф ос Россия, 109544 Москва, ул. Школьная 39 Тел. (+7) 495 737 30 00, 564 88 00 Факс (+7) 495 737 75 36, 564 88 11

E-mail grundfos.moscow@grundfos.com

Serbia

GRUNDFOS Predstavništvo Beograd Dr. Milutina Ivkovića 2a/29 YU-11000 Beograd Phone: +381 11 26 47 877 / 11 26 47 496 Telefax: +381 11 26 48 340

Singapore

GRUNDFOS (Singapore) Pte. Ltd. 24 Tuas West Road Jurong Town Singapore 638381 Phone: +65-6865 1222 Telefax: +65-6861 8402

Slovenia

GRUNDFOS PUMPEN VERTRIEB Ges.m.b.H., Podružnica Ljubljana Blatnica 1, SI-1236 Trzin Phone: +386 1 563 5338 Telefax: +386 1 563 2098 E-mail: slovenia@grundfos.si

South Africa Grundfos Alldos Dosing & Disinfection

ALLDOS (Pty) LTD 98 Matroosberg Road, Waterkloof Park P.O. Box 36505, Menlo Park 0102 0181 ZA Pretoria E-mail: alldos.za@alldos.com

Spain

Bombas GRUNDFOS España S.A. Camino de la Fuentecilla, s/n E-28110 Algete (Madrid) Tel.: +34-91-848 8800 Telefax: +34-91-628 0465

Sweden

GRUNDFOS AB (Box 333) Lunnagårdsgatan 6 431 24 Mölndal Tel.: +46(0)771-32 23 00 Telefax: +46(0)31-331 94 60

Switzerland Grundfos Alldos Dosing & Disinfection

ALLDOS International AG Schönmattstraße 4 CH-4153 Reinach Tel.: +41-61-717 5555 Telefax: +41-61-717 5500 E-mail: alldos.ch@alldos.com

Switzerland

GRUNDFOS Pumpen AG Bruggacherstrasse 10 CH-8117 Fällanden/ZH Tel.: +41-1-806 8111 Telefax: +41-1-806 8115

Taiwan

GRUNDFOS Pumps (Taiwan) Ltd. 7 Floor, 219 Min-Chuan Road Taichung, Taiwan, R.O.C. Phone: +886-4-2305 0868 Telefax: +886-4-2305 0878

Thailand

GRUNDFOS (Thailand) Ltd. 92 Chaloem Phrakiat Rama 9 Road, Dokmai, Pravej, Bangkok 10250 Phone: +66-2-725 8999 Telefax: +66-2-725 8998

Turkey

GRUNDFOS POMPA San. ve Tic. Ltd. Sti. Gebze Organize Sanayi Bölgesi Ihsan dede Caddesi,

2. yol 200. Sokak No. 204 41490 Gebze/ Kocaeli Phone: +90 - 262-679 7979 Telefax: +90 - 262-679 7905 E-mail: satis@grundfos.com

Ukraine

ТОВ ГРУНДФОС УКРАЇНА 01010 Київ, Вул. Московська 8б,

Тел.:(+38 044) 390 40 50 Фах.: (+38 044) 390 40 59

E-mail: ukraine@grundfos.com

United Arab Emirates

GRUNDFOS Gulf Distribution P.O. Box 16768 Jebel Ali Free Zone Dubai Phone: +971-4- 8815 166 Telefax: +971-4-8815 136

United Kingdom Grundfos Alldos Dosing & Disinfection

ALLDOS Ltd. 39 Gravelly Industrial Park, Tyburn Road Birmingham B24 8TG Phone: +44-121-3283336 Telefax: +44-121-3284332 E-mail: alldos.uk@alldos.com

United Kingdom

GRUNDFOS Pumps Ltd. Grovebury Road Leighton Buzzard/Beds. LU7 8TL Phone: +44-1525-850000 Telefax: +44-1525-850011

U.S.A.

GRUNDFOS Pumps Corporation 17100 West 118th Terrace Olathe, Kansas 66061 Phone: +1-913-227-3400 Telefax: +1-913-227-3500

Usbekistan

Представительство ГРУНДФОС в Ташкенте 700000 Ташке нт ул.Усма на Носира 1-й тупик 5 Телеф он: (3712) 55-68-15 Факс: (3712) 53-36-35

Addresses revised 17.03.2008

www.grundfosalldos.com

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Thinking ahead makes it possible

Innovation is the essence

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Grundfos DMH 251, DMH 252, DMH 253, DMH 254, DMH 255 Installation And Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual