Omega Products PHP-201A-211A Installation Manual

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PHP-200/210 SERIES

Solenoid Dosing Pump

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User’s Guide

Servicing North America:

U.S.A.: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford, CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

U.S.A. and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378 / 1-800-622-BEST

®

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

®

Mexico: En Espan˜ ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt, France

TEL: [phone] FAX: [phone]
Toll Free in France: 0800 466 342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

OMEGAnet®Online Service Internet e-mail

omega.com [e-mail]

It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

Control elements and key functions

Control elements: overview

2

3

4

5

1

9

10

8

11

12

13

7

6

1 LCD display
2 Stroke length adjusting knob
3 UP key
4 P key
5 DOWN key
6 STOP/START key
7 i key
8 Fault indicator (red)
9 Warning indicator (yellow)

10 Operating indicator (green)

11 “Dosing monitor” terminal
12 “External control” terminal
13 “Float switch” terminal

Key functions

In continuous display mode In settings mode
(operating) (settings)

STOP/START key

STOP

STOP

START

Press briefly Stop pump, Stop pump,

start pump start pump

P key

P

Press briefly Start batch (in “ batch” operating mode only), Confirm entry- jump to next menu

Cancel error option or continuous display

Press for 2 s Change to settings mode --­Press for 3 s --- Jump to continuous display
Press for 15 s Load factory settings (calibration) ---

i key

i

Press x1 Toggle between continuous displays Toggle between “change individual digits”

and change a figure"

Press x2 --- For “change individual digits”:

jumps to first digit

Arrow keys UP and DOWN

Press x1 Change directly alterable values Select other settings,
(until “Set” appears) change individual digit or figure

Press simultaneously Prime ---

P

P

P P P P

P

P

P

PP P

PP P

PP PP

PP

P

P

P

P

P

P P

P

P

i

STOPSTOP

STARTSTART

Batch

Contact

ManualAnalog

Analog

Manual

Contact

Batch

Set

mA

Set

Analog

mA

Set

Analog

Set

Analog

mA

Set

Analog

mA

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

Freq.

Set

Analog

mA

Set

Analog

mA

Set

Analog

mA

Set

Analog

mA

Set

Analog

mA

Set

Analog

mA

Set

Analog

mA

Set

Analog

mA

Set

Analog

mA

Set

Analog

mA

Set

Analog

Set

Analog

Set

Analog

2 s

Set

Analog

Set

Analog

Set

Analog

2

1

Operating-/Settings Diagram

Continuous

display

Start/stop pump

Change directly alterable values

= Lock (CODE 1)

= Lock (CODE 2)

Prime

Start batch (in"batch" operating mode only)

Cancel error

Check adjustable values

2

1

P

P P PP

PP

P PP P

P

P

i

P

P

P

P

P

P

P

PP P

P

P P

P

P P

P

P

P

Set

Set

Set

Set

Set

L

N

*

Set

Mem

Batch

*

Set

Mem

Batch

*

Set

Mem

Batch

*

Set

Mem

Batch

*

Set

Mem

Batch

*

Set

Mem

Batch

*

Set

Mem

Batch

*

Set

Mem

Batch

*

Set

Mem

Batch

*

Set

Mem

Batch

Set

Mem

Batch

Set

Mem

Batch

Set

Flow

Set

Flow

Set

Flow

Set

Flow

Set

Flow

Set

Flow

Set

Flow

Set

Flow

Freq.

Set

Aux

Freq.

Set

Aux

Freq.

Set

Aux

Freq.

Set

Aux

Freq.

Set

Aux

Freq.

Set

Aux

Set

Set

Set

Calib

Set

Calib

Set

Calib

Set

Calib

N

LSet

Calib

LSet

Calib

LSet

Calib

LSet

Calib

LSet

Calib

LSet

Calib

LSet

Calib

LSet

Calib

LSet

Calib

LSet

Calib

Set

Mem

Batch

L

Set

Mem

Batch

L

LSet

gal

Set

Set

Calib

N

P P P

P P

Set

Set

Mem

Contact

Set

Mem

Contact

Set

Mem

Contact

Set

Mem

Contact

Set

Mem

Contact

Set

Mem

Contact

Set

Mem

Contact

Set

Mem

Contact

Set

Mem

Contact

Set

Mem

Contact

P

i

i

i

i

i

i

i

i

i

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Table of Contents

Table of Contents

General User Guidelines

1 About This Pump

............................................................................................................................... .........................................

1

2 Safety

............................................................................................................................... .....................................................................

1

3 Storage, Transport and Unpacking

..........................................................................................................................

2

4 Device Overview and Control elements

..............................................................................................................

2

4.1 Device overview

............................................................................................................................... ................................

2

4.2 Control elements

............................................................................................................................... ..............................

3

5 Function Description

............................................................................................................................... ..............................

3

6 Assembly and Installation

............................................................................................................................... ..................

6

6.1 Assembling dosing pump

............................................................................................................................... .........

6

6.2 Assembling tubing

............................................................................................................................... ..........................

6

6.2.1 Installation for non-self bleeding pumps

..................................................................................

6

6.2.2 Installation of self-bleeding pumps

...............................................................................................

8

6.3 Electrical Installation

............................................................................................................................... .....................

9

6.4 Retrofitting relays

............................................................................................................................... .............................

12

7 Settings

............................................................................................................................... ................................................................

14

7.1 Check adjustable values

............................................................................................................................... ............

15

7.2 Change to settings mode

............................................................................................................................... .........

15

7.3 Select operating mode (MODE menu)

...........................................................................................................

16

7.4 Settings for operating mode (SET menu)

....................................................................................................

16

7.4.1 Settings for “manual” operating mode

......................................................................................

16

7.4.2 Settings for “analogue” operating mode (ANALG menu)

............................................

16

7.4.3 Settings for “contact” operating mode (CONTCT menu)

...........................................

18

7.4.4 Settings for “batch” operating mode (BATCH menu)

.....................................................

20

7.5 Settings for programmable functions (SET menu)

..............................................................................

21

7.5.1 Settings for “calibration” function (CALIB menu)

..............................................................

21

7.5.2 Settings for the “pressure levels” function (PRESS menu)

........................................

22

7.5.3 Settings for “auxiliary frequency” function (AUX menu)

..............................................

22

7.5.4 Settings for the “flow” function (FLOW menu)

.....................................................................

23

7.6 Setting code (CODE menu)

............................................................................................................................... .....

23

7.7 Cancel total stroke number or total litres (CLEAR window)

........................................................

23

8 Commissioning

............................................................................................................................... .............................................

24

8.1 Precision dosing settings

............................................................................................................................... ..........

25

8.2 Diagrams for setting feed capacity

..................................................................................................................

26

9 Operating

............................................................................................................................... ............................................................

26

9.1 Manual operation

............................................................................................................................... .............................

26

9.2 Remote control

............................................................................................................................... ..................................

27

10 Maintenance

............................................................................................................................... ....................................................

28

11 Repairs

............................................................................................................................... .................................................................

28

12 Troubleshooting

............................................................................................................................... ...........................................

34

13 Decommissioning and Disposal

............................................................................................................................... ..

35

i

Table of Contents

14 Technical Data

............................................................................................................................... ...............................................

36

14.1 Performance data and weights

...........................................................................................................................

36

14.2 Dosing reproducibility

............................................................................................................................... ..................

37

14.3 Viscosity

............................................................................................................................... ..................................................

37

14.4 Materials Data for Liquid ends

.............................................................................................................................

37

14.5 Electrical Data

............................................................................................................................... ....................................

37

14.6 Ambient conditions

............................................................................................................................... ........................

38

14.7 Enclosure rating and safety class

.....................................................................................................................

38

14.8 Compatibility

............................................................................................................................... .......................................

38

15 Accessories

............................................................................................................................... ......................................................

39

Appendix

............................................................................................................................... .............................................................

40

Dimensions

.......................................................................................................................................................................................

40

Exploded diagrams of liquid ends

............................................................................................................................... ...

44

Feed rate settings diagrams

............................................................................................................................... .................

62

ii

General User Guidelines

Please read through the following user guidelines. Familiarity with these points ensures
optimum use of the operating instructions.

On the fold-out page after the title page you will find the overviews “control elements and key
functions” and “operating/settings diagrams”.
You will find it useful to open out the “control elements and key functions” overview as you read
this instructions manual.

Key points in the text are indicated as follows:

• Enumerated points
Hints

Working guidelines:

GUIDELINES

Guidelines are intended to make your work easier.

Safety guidelines:

WARNING

Describes a potentially dangerous situation. Could result in loss of life or
serious injury if preventative measures are not taken.

CAUTION

Describes a potentially dangerous situation. Could result in lesser injuries or
damage to property if preventative measures are not taken.

TAKE CARE

Describes a potentially threatening situation. Could result in damage to
property if preventative measures are not taken.

The name plate affixed to the title page is identical to that on the pump supplied.
This facilitates matching the correct operating instructions manual to the correct pump.

Please quote the identity code and the serial number, which you will find on the name plate, in
any subsequent correspondence or when ordering spare parts. This will ensure accurate
identification of the pump type and material version.

General User Guidelines

iii

About this pump / Safety

1 About This Pump

The pumps in the PHP-200/210 pump series are microprocessor controlled solenoid
dosing pumps with the following special features:

• The feed rate can be displayed in l/h and/or gal/h (calibrated), or in strokes/min.

• The stroke rate is continuously adjustable and is displayed in the LCD display.

• Stroke rate adjustment is digitally accurate and is displayed in the LCD display.

• The rated pressure of the pump can be adapted to individual systems.

• Two pumps can be controlled in different ways via the same standard signal.

• Large, illuminated LCD display

The hydraulic parts of the PHP-200A Series are identical to those of the PHP-200 Series.

2 Safety

Correct use The pump must be used for liquids only!

The pump may be used only in compliance with the technical data and specifications given
in the operating instructions!

It is forbidden to use the pump for any other purpose, or to modify it in any way!

The pump is not suitable for dosing gases or solids!

The pump must be used by trained and authorised personnel only!

Safety guidelines

WARNING

• As soon as the pump is connected to the electricity supply it may

commence pumping!
Avoid leakage of hazardous chemicals in this case!
If this should occur, then press the STOP/START key or disconnect the
pump from the power supply immediately!

• The pump cannot be switched to a current-free status! In the event of an
electrical accident, disconnect cable from the mains power supply!

• Disconnect cable from the mains power supply before commencing work on
the pump!

• Always depressurise liquid end before commencing work on the pump!

• Empty and rinse out the liquid end before commencing work on the pump

after use with hazardous or unknown chemicals!

• Pumps for radioactive materials may not be returned to OMEGA after use!

CAUTION

• It is not permitted to assemble and install OMEGA dosing pumps with

non-original parts unless these have been checked and recommended by
OMEGA.

It can result in harm to persons and property for which no liability

will be accepted!

• When dosing aggressive materials, check the resistance of the pump
materials

• If another liquid end size is installed the pump must be reprogrammed on
factory premises!

• Observe applicable national directives during installation!

Sound intensity level The sound intensity level is < 70 dB (A) at maximum stroke, maximum stroke rate, maximum

back pressure (water) in accordance with:
DIN EN ISO 3744 (Reproducibility 2 Determining Sound Intensity Level)
PR DIN EN 12639 (Metering Pump Noise Measurement)
DIN 45635-24 (Machine Noise Measurement)

1

Storage, Transport and Unpacking / Device Overview and Control elements

3 Storage, Transport and Unpacking

Transport and store the pump in the original packaging!

Protect the packed pump from moisture and the effects of chemicals!

Environmental conditions for storage and transport:

Storage and transport temperature: –10 bis +50 °C
Humidity: < 92 % relative humidity

Check that the delivery is complete:

Delivery range • Dosing pump with mains lead

• Operating instructions manual

• Accessories if applicable

4 Device Overview and Control elements

When reading this section it is helpful to fold out the overview “Control elements and key
functions”!

4.1 Device overview

3

3.1

a

d

b

f

g

c

3.2

a

e

b

d

c

1 2

1 Control unit
2 Power end
3 Liquid end

Fig. 01

a Backplate
b Liquid end
c Suction valve
d Discharge valve
e Bleed valve
f Coarse/fine bleed valve
g Bypass hose nozzle

Fig. 02 Fig. 03

2

Device Overview and Control elements / Function Description

4.2 Control elements

Please acquaint yourself with the pump control elements with the help of the “control
elements and key functions” overview!

Indicators The LCD display supports the operation and setting of the pump with a range of indicators:

Set

Flow

Calib

Mem

ErrorPauseAux

Stop

The indicators are interpreted as follows:

Symbol for P key: The pump is in settings mode.

Close symbol: In a continuous display: lock (if code has been set).

In settings mode: indicates access to code menu.

Stop: The pump has been stopped using the STOP/START key.

Pause: The pump has been stopped using the “pause” function

(external).

Aux: The pump is pumping at the auxiliary frequency. In AUX

menu: the pump is in the AUX menu.

Error: A fault has occurred and the pump has been stopped.

Mem: An additional “memory” function has been set in the “contact”

and “batch” operating modes.
In CNTCT or BATCH menus (“mem” flashes): the memory
function can be set

Calib: The pump is in the CALIB menu.

n a continuous display (“calib” flashes”): more than ± 10 %
deviation of stroke rate from value at the moment of calibration.

Flow: The pump is in the FLOW menu.

Set: The pump is in the SET menu.

Command symbol: The number of strokes reached is above the maximum value

(99999) that can be shown in the LCD display

IMPORTANT

The pump pump only displays the metering output in l or l/h when calibrated

5 Function Description

Function principle Dosing takes place as follows: the dosing diaphragm is forced into the liquid end; the pressure

in the liquid end causes the suction valve to close and the chemical flows out of the liquid end
through the discharge valve. The dosing diaphragm is then forced back out of the liquid end.
The vacuum in the liquid end causes the discharge valve to close and fresh chemical flows into
the suction valve in the liquid end. This concludes one operating cycle.

The dosing diaphragm is driven by an electronically controlled electrical solenoid.

Feed rate The feed rate is determined by the stroke length and the stroke rate.

The stroke length is set between 0 - 100 % using the stroke length adjusting knob. Optimum
dosing reproducibility is achieved by setting the stroke length to between 30 - 100 % (SEK type:
50 - 100 %)!

The stroke rate is set using the arrow keys (not in “analogue” operating mode) to between
0 - 180 strokes/min.

Self-bleed function Pumps with self-bleed function (= SEK types) can operate a prime action even when the

discharge tubing is closed, discharging existing air through a bypass valve. These pumps can
release gas even during operation, irrespective of the actual operating pressure.

Auto:

The pump is in “Auto” operating mode.

An in-built pressure maintenance valve allows accurate dosing even in depressurised states.

3

Function Description

Operating modes Operating modes are selected using the MODE menu (depending upon identity code, some

operating modes may be absent).

“ Analogue” operating mode: (Identity code, control variant: analogue current)

The stroke rate is controlled via an analogue electrical signal via the “external control” terminal.
Signal processing is pre-selected at the controller.

“ Manual” operating mode: (Identity code, control variant: manual, standard function)

The stroke rate is controlled manually via the controller.

“ Contact” operating mode: (Identity code, control variant: external 1:1 / external with pulse
control)

This operating mode offers the opportunity to make fine adjustments with small increase/
decrease factors. Dosing can be activated by a pulse via the “external control” terminal or by a
semiconductor element. With the “pulse control” option it is possible to pre-set a feed quantity
(batch) or number of strokes (factor 0.01 to 99.99) via the control unit.

“ Batch” operating function: (identity code, control variant, external 1:1 / external with pulse
control)

This operating mode offers the option of working with larger transfer factors (up to 65535).
Metering can be triggered by pressing the P key or a pulse from the “external control” terminal
via a contact or semiconductor element. A batching quantity or number of strokes can be pre­selected via the control unit.

Functions The following functions can be selected using the SET menu:

“ Calibrate” function:

The pump can be operated in all operating modes including in calibrating mode. The
corresponding continuous displays can show the actual feed quantity or the feed rate.
Calibration is maintained within the stroke frequency range 0 - 180 strokes/ min. Calibration is
also maintained when a stroke frequency is altered up to ± 10 %.

“ Pressure level” function:

It is possible to set different pressure levels.

“ Auxiliary frequency” function:

It is possible to set a stroke rate in the SET menu, which may be activated via the “external
control” terminal. This auxiliary frequency overrides all other pre-set stroke rate frequencies.

“ Flow” function:

Stops the pump when the flow is insufficient. In the SET menu, the number of failed strokes
is entered after which the pump will be turned off.

The following functions are available as standard:

“ Float switch” function:

Information on the liquid level in the feed chemical container is transmitted to the pump.
This option requires the installation of a 2-stage float switch. This is connected to the “float
switch” terminal.

“ Pause” function:

The gamma/ L can be stopped by remote control via the “external control” terminal. The
pause” function operates only via the “external control” terminal.

The following functions are activated by keystrokes:

“ Stop” function:

The pump can be stopped by pressing the STOP/START key without disconnecting from
the mains power supply.

.

4

Function Description

“ Prime” function:

Priming (short term feed at maximum frequency) is activated by pressing both arrow keys at the
same time.

Optional relay The pump has two connection options.

“ Fault indicating relay” option:

In the event of fault signals, warning signals or float switch activation signals, connects an
electrical circuit to trigger alarm sirens etc. The relay is retrofitted via an aperture in the power
end.

“ Fault indicating and pacing relay” option:

Along with the fault indicating relay, the pacing relay produces an electrical impulse for every
stroke. The relay is retrofitted via an aperture in the power end.

Function and error

indicators The operating and error status is shown via the three LEDs and the “error” indicator on the LCD

(see also section 12):

LCD indicator If a fault occurs “error” will appear along with an additional fault warning.

LED indicator Operating indicator (green)

This indicator is lit as long as the pump is operating correctly.

Warning indicator (yellow)

This warning light appears if the pump electronics detect a situation that could lead to a
fault, e.g. “liquid levels low 1st stage”.

Warning indicator (red)

This warning light appears if a fault occurs, e.g. “liquid levels low 2nd stage”.

Hierarchy of operating modes, functions and fault statuses

The different operating modes, functions and fault statuses each have a differing effect on
whether and how the pump functions. These effects are given below:

1. Prime

2. Fault, stop, pause

3. Auxiliary frequency

4. Manual, analogue, contact, batch

to:

1. “Prime” can be activated in any pump status (as long as it is operable)

2. “Fault”, “stop” and “pause” stop all system parts up to “prime”.

3. The stroke rate of the “auxiliary frequency” always overrides the existing operating
stroke rate.

5

Assembly and Installation

6 Assembly and Installation

WARNING

• The pump series dosing pumps must be commissioned exactly as

described in the operating instructions manual!

• It is not permitted to assemble and install OMEGA dosing pumps with
non-original parts unless these have been checked and recommended by
OMEGA.

• Always depressurise tubing before working on the dosing pump. Empty and
rinse out the liquid end!

• Never allow the dosing pump to operate when an discharge tube stop tap is
closed ! It may burst!

• Remove all water from liquid end before commissioning or rinse with a
suitable cleaning agent if using chemicals that should not come into contact
with water!

• Before unscrewing the control unit disconnect the mains lead from the
power supply!

• Observe applicable national directives during installation!

6.1 Assembling dosing pump

TAKE CARE

• The pump should be fixed in such a way as to prevent vibration!

• Suction and discharge valve must be upright (bleed valve in self-bleed liquid

ends)!

• Ensure free access for operation and maintenance!

Assembling dosing pump The base of the dosing pump must be mounted on a firm, horizontal surface.

6.2 Assembling tubing

6.2.1 Installation for non-self bleeding pumps

CAUTION

• Tubing must be free from stress and kinks when fitted!

• When dosing extremely aggressive or hazardous chemicals it is advisable to

install a bleed valve that feeds back to the container and isolation valves on
the prime and discharge sides.

• In order to ensure connections are fast, use correctly sized clamping rings
and nozzle unions!

• Use only original hoses with specified dimensions and wall-thicknesses!

• Do not exceed maximum permissible priming pressure (see section 14)!

• It is imperative that the maximum permissible operating pressure is not

exceeded (see section 14 and appendix documentation)!

GUIDELINE

The tubing should be attached in such a way as to allow lateral detachment of the
pump and the liquid end if necessary!

6

Assembly and Installation

PP, PC, NP, TT versions Assembling tubing to plastic valves (see fig. 04)

Cut hose ends straight across

Push union nut (2) and clamping ring (3) onto hose (1)

Push the hose end (1) over the nozzle (4) to the stop. Widen if necessary

Make sure that the O-ring (5) is sitting correctly in the valve (6)

Place the hose (1) with the nozzle (4) onto the valve (6)

Clamp the hose connector:
Tighten the union nut (2) while pressing in the hose (1)

Retighten the hose connector:
Pull the tubing (1) connected to the liquid end briefly and then retighten the union nut (2)

1

2

4

5

6

3

1 Hose

1

2

4

5

3

1Tube

2 Union nut 2 Union nut ring

3 Clamping ring 3 Rear clamping

4 Nozzle 4 Front clamping ring

5 O-ring 5 Valve

6 Valve

Fig. 04 Fig. 05

SS Version Assembling stainless steel tube connectors to stainless steel valves (see fig. 05)

Push union nut (2) and clamping rings (3, 4) onto tube (1) leaving approx. 10 mm distance
between them

Push tube (1) up to the stop in the valve (5)

Tighten union nut (2)

SS Version Assembling tubing to stainless steel valves

TAKE CARE

Assemble only PE or PTFE tubing to stainless steel valves!

Insert an additional support (stainless steel) into PE or PTFE tubing

Installing suction tubing

TAKE CARE

Do not exceed maximum permissible priming pressure on the prime side (see
section 14)!

GUIDELINE

• Make suction tubing as short as possible.

• Suction tubing should be rising in order to prevent air bubbles forming!

• As far as possible use swept bends for bends rather than right angle bends!

• Measure the length and cross section to ensure that the vacuum created by the

priming action does not reach the vaporising pressure of the feed chemical! In
extreme cases excess vacuum on the priming side can cause breaks in the liquid
column or incomplete return stroke!

• Please note: “Priming lift x density of feed chemical

max. priming lift” (in m WG)

Assembly of foot valve Cut the free suction end so that the foot valve hangs just above the container base; for

chemicals with impurities or sedimentation at the bottom, the foot valve should be
positioned well above this layer.

7

®

Assembly and Installation

Installing pressure tubing

TAKE CARE

• The discharge tubing should be laid in such a way as to ensure that the

pressure surge of the discharge stroke does not exceed the maximum
operating pressure. As overload protection for the discharge tubing, it is
advisable to fit a relief valve feeding back into the chemical supply container,
e.g. a OMEGA multifunction valve.

• Check that the length and cross section of the tubing are correct!

6.2.2 Installation of self-bleeding pumps

CAUTION

• Observe all installation and safety guidelines for standard pumps!

• Do not exceed tubing cross section, priming lift, priming pressure or

viscosity of feed chemical!

In addition to the suction and discharge tubing, a bypass tube should be connected. This is
attached to the bleed valve on the upper side of the liquid end (red packing, see fig. 06).

GUIDELINE

The discharge valve is located on the front of the liquid end in the SEK type!

Installation of by-pass tubing

GUIDELINE

When the suction side is primed, at least equal pressure must exist in the bypass
tubing!
The pump can operate when the bypass is primed and the suction side is
depressurised.

Place the tube onto the bypass nozzle and/or bleed valve of the self-bleed function liquid
end (recommended: flexible 6x4 PVC hose)

Push the free end of the tube back into the dosing container

Cut the bypass tube so that it does not enter the feed chemical.

Bleed valve for the bypass tube to the supply
container, 6/4 mm

Discharge valve for discharge tubing to injection
point, 6/4 - 12/9 mm

Suction valve for suction tubing in supply
container, 6/4 - 12/9 mm

Fig. 06

8