Blagdon Pump B50 User Manual

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SERVICE & OPERATING MANUAL

B50

AIR OPERATED

DOUBLE DIAPHRAGM PUMP

B50 05 Metallic Series

Aluminium & Cast Iron

High Pressure W1 Series

Table of Contents

Service / Maintenance Log 2

Performance Curve 3

Dimensions 3

Engineering Data & Temperature limitations 4

Explanation of Pump Nomenclature 4

Principle of Pump Operation 5

Installation guide 5

Troubleshooting 6

Recycling 6

Important Safety Information 6

Warranty 7

Service 7

Air Valve Overhaul 7

Wet-side Overhaul 7

Parts List 8

Assembly Drawing 9

Declaration of Conformity 10

HG-CF-1109 Rev. D – 03.11.11

II 2 GD c

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Service / Maintenance Log

Date Details Completed

Contact Phone / Fax No.

HG-CF-1109 Rev. D – 03.11.11

Contact Information

IDEX Pump Technologies (Ireland) Ltd., A Unit of IDEX Corporation, R79, Shannon, Co Clare, IRELAND. TEL. : +353 61 471933 FAX. : +353 61 475046 Web Site : www.blagdonpump.com E-Mail : sales@blagdonpump.com

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G.A. Drawing & Performance Curve

General Assembly :- B50 05 Series 1 2:1 Metallic Pump, All dimensions +/- 3mm

HG-CF-1109 Rev. D – 03.11.11

B50 2:1 Metallic Pump Performance Curve, Performance based on water at ambient temperature

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TECHNICAL DATA

FLUID CONNECTIONS CAPACITY MAX SOLIDS MAX DISCHARGE HEAD DISPLACEMENT/STROKE

2” BSP (F) 0 - 250 Litres/Minute

(0 - 55 Gallons/Minute)

6 MM (1/4”)

88 Meters

(289 ft)

1.9 Litres

(0.42 UK Gallons)

MAX. WORKING PRESSURE AIR INLET TEMPERATURE LIMITS PUMP WEIGHTS :-

10 Bar (145 psi) 3/4” BSP (F) Determined by Elastomers AA :- 35 Kg CC:-70 Kg

Note ! Maximum discharge pressure must not exceed 10 bar.

Caution - Operating temperature limitations are as follows:

Materials

Buna-n - General purpose, oil resistant. Shows good solvent, oil, water and hydraulic fluid resistance. Should not

be used with highly polar solvents like acetone and MEK, ozone, chlorinated hydrocarbons and nitro hydrocarbons.

EPDM - Shows very good water and chemical resistance. Has poor resistance to oils and solvents, but is fair on

ketones and alcohols.

Neoprene - All purpose. Resistant to vegetable oil. Generally not affected by moderate chemicals, fats greases

and many oils and solvents. Generally attacked by strong oxidising acids, ketones, esters, nitro hydro carbons and chlorinated aromatic hydrocarbons.

Santoprene® - Injection moulded thermoplastic elastomer with no fabric layer. Long mechanical flex life.

Excellent abrasion resistance.

PTFE - Chemically inert, virtually impervious. Very few chemicals are known to react chemically with PTFE :

molten alkali metals, turbulent liquid or gaseous fluorine and a few fluoro-chemicals such as chlorine trifluoride or oxygen difluoride which readily liberate free fluorine at elevated temperatures.

Viton® - Shows good resistance to a wide range of oils and solvents : especially all alphatic, aromatic and

halogenated hydrocarbons, acids, animal and vegetable oils.

Polypropylene - High strength, light weight, corrosion resistant polyolefin which easily withstands most

chemicals, with no known solvent at room temperature.

TYPICAL CODE = B50 05 A A. W 1. N N S

CA :- 50 Kg

Operating Temperatures

Maximum Minimum Optimum

176oF

212oF

100

212oF

100

212oF

100

356oF

180

356oF

180

158oF

-18oF

-28

-11oF

-24

-4oF

-20

-10oF

-23

32oF

0oF

-18

-40oF

-40

50o to 140oF

to 60oC

50o to 212oF

to 100oC

50o to 130oF

to 54oC

50o to 212oF

to 100oC

50o to 212oF

to 100oC

75o to 212oF

to 100oC

50o to 140oF

to 60oC

MODEL - B50

DESIGN LEVEL

WETTED COMPONENTS

A : ALUMINIUM C: CAST IRON

NON - WETTED COMPONENTS

A : ALUMINIUM C : CAST IRON

VALVE TYPE

B : BALL W : WEIGHTED BALL

SUCTION ORIENTATION

B : BOTTOM SUCTION, W1 SERIES

This pump should be used in accordance with the requirements of the Safety, Health & Welfare at Work Act 2005.

All business conducted subject to IDEX Pump Technologies, Ireland. Terms and Conditions of Sale, available on request.

VALVE SEATS

A : ALUMINIUM S : 316 STAINLESS STEEL

VALVE BALLS

B : BUNA-N T : PTFE E : EPDM V : VITON N : NEOPRENE S : ST. STEEL D : DELRIN (ACETAL)

DIAPHRAGMS

B : BUNA-N T : PTFE E : EPDM V : VITON H : POLYESTER (HYTREL) N : NEOPRENE P : POLYURETHANE R : SANTOPRENE O : ONE-PIECE PTFE

IMPORTANT

HG-CF-1109 Rev. D – 03.11.11

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PRINCIPLE OF PUMP

OPERATION

This ball valve type diaphragm pump is powered by compressed air and is a 2:1 ratio design. The inner side of one diaphragm chamber is alternately pressurised while simultaneously exhausting the other inner chamber. This causes the diaphragms, which are connected by a common shaft secured by plates to the centres of the diaphragms, to move in a reciprocating action. (As one diaphragm performs a discharge stroke the other diaphragm is pulled to perform the suction stroke in the opposite chamber.) Air pressure is applied over the entire inner surface of the diaphragm while liquid is discharged from the opposite side of the diaphragm. The diaphragm operates in a balanced condition during the discharge stroke which allows the pump to be operated at discharge heads of over 300 feet (91 meters) of water.

For maximum diaphragm life, keep the pump as close to the liquid being pumped as possible. Positive suction head in excess of 10 feet of liquid (3.048 meters) may require a back pressure regulating device to maximize diaphragm life.

Alternate pressurising and exhausting of the diaphragm chamber is performed by an externally mounted, pilot operated, 2 way type distribution valve. When the spool shifts to one end of the valve block body, inlet pressure is applied to one chamber and the other diaphragm chamber exhausts. When the spool shifts to the opposite end of the valve body, the pressure to

Available from

Blagdon Pump :-

1. Pulsation Dampener

2. Filter/Regulator

3. Lubricator

4. Air Dryer

Installation Guide

Fig. 1

Shut-off

Valve

SUCTION

Drain Port

Air Inlet

Pipe Connection (Style Optional)

Gauge

Exhaust

Flexible

Connection

Air

Air Exhaust

Pulsation

Dampener

the chambers is reversed. This alternating movement of the spool inside the valve body is controlled by a pilot air pressure signal held against the diaphragm shaft, between seals in the diaphragm shaft bushes. This signal is released, triggering the movement of the spool, when pilot holes in the diaphragm shaft align with the held pilot signal, sending the signal to exhaust, which in-turn causes a pressure imbalance around the spool, sending it to the opposite end of the valve body. This simultaneously sends inlet pressure to the opposite chamber.

The chambers are connected by manifolds with a suction and discharge ball valve in one chamber only, the opposite chamber being blanked off, and pressurised on the fluid side also, to create the 2:1 ratio, maintaining flow in one direction through the pump.

INSTALLATION

The typical installation shown in FIG. 1 is only a guide to selecting and installing system components. Your installation will depend on the type of fluid being pumped and your application needs. To reduce the risk of serious bodily injury and damage to property, never use fluids in this pump which are not compatible with the wetted components. Contact your local distributor or the manufacturer for system design assistance & compatibility if necessary.

Mount the pump in an upright position. Failure to ensure an upright position may result in loss of or poor priming characteristics. Ensure the pump is securely mounted to avoid movement and possible risk of bodily injury.

CAUTION !

The air exhaust should be piped to an area for safe disposition of the product being pumped, in the

Pipe Connection (Style Optional)

Flexible

Connection

Filter Regulator/Lubricator

Gauge

Drain Port

event of diaphragm failure.

Shut-off

Valve

Air Dryer

DISCHARGE

Air Shut-Off

Valve

AIR INLET

PRESSURE The pump delivers the same pressure at the discharge outlet as the air pressure applied at the air inlet (unless pump is configured as a 2:1 ratio model).

NOTE: Pressure Regulator (H) should be installed where air supply could exceed 125 psi.

SAFETY

Your BLAGDON PUMP is a high performance unit capable of achieving

high outputs at high efficiencies. However, as is common with pneumatic equipment, the pump efficiencies is reliant upon the air being clean, dry and filtered. Failure to comply with these requirements may lead to loss of performance and reduced component life and in extreme cases, permanent damage to the pump.

To avoid leaks, ensure that all fluid connections are tight. The use of PTFE thread tape correctly applied should be used to ensure 100% leak proof connections. Failure to ensure 100%

sealability of the suction connection could adversely affect suction performance.

If you are pumping hazardous fluids, or operating the pump in an enclosed area, it is essential that the exhaust from the pump is piped away to a safe location. When pumping hazardous fluids the above instructions must be adhered to in order to ensure safe operating procedures. (Under certain operating conditions the failure of internal components can lead to the pumped fluid being exhausted via the pump exhaust outlet).

WARNING NEVER place your hands over or near the

pump suction inlet. Powerful suction could cause serious bodily injury.

FLUSH THE PUMP This pump was tested with water containing an oil-based rust inhibitor. If this solution could contaminate or react with the fluid you are pumping, flush the pump thoroughly with a solvent/detergent to clean internal components. The solvent/ detergent must be compatible with the pump materials of construction. Care should be taken to flush the pump each time it is disassembled for maintenance or repair.

CAUTION All BLAGDON PUMPS are built lubricated with grease during assembly and need no further lubrication. If the use of oil cannot be avoided, this will not present any problems. A light No. 2 class lithium grease is recommended. Other grades may cause the Air Logic System to operate intermittently, thereby causing a loss of output and failure to operate. Other seals are available for “clean room” conditions.

If the pump accelerates or is running too fast due to a lack of fluid, then stop it immediately by shutting off the air supply. A dry pump will accelerate to a high speed causing wear to elastomers.

If the fluid you are pumping tends to dry up or set when it is not moving, then flush the pump as often as necessary to prevent the fluid from drying in the pump. Drain the pump thoroughly before storing.

If feasible, invert pump to allow any fluid to drain from the non-return valves

HG-CF-1109 Rev. D – 03.11.11

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TROUBLE SHOOTING GUIDE

NOTE :- Check all solutions before dismantling the pump.

PROBLEM CAUSE SOLUTION

Pump will not start Air valve assembly malfunction/Siezure

Obstructed fluid line. Obstructed diaphragm chamber. Diaphragm failure causing fluid & excessive air to be expelled through the exhaust. Diaphragm seal failure. Air valve system malfunction. Air connected to exhaust.

Erratic flow Diaphragm failure on one side.

Valve ball not seating. Suction leakage. Diaphragm failure causing fluid & excessive air to be expelled through the exhaust. Diaphragm seal failure. Air valve system malfunction.

Pump strokes but will not discharge

Excessive suction lift. Suction line leakage. Valve ball not seating correctly or damaged. Suction line or strainer clogged. Diaphragm failure.

Fluid discharged from air exhaust

Diaphragm Failure. Loose frontplate.

Intermittent stroke rate Over lubrication

Diaphragm shaft seal failure. Air valve system malfunction. Valve ball not seating / partially obstructed.

Check carrier for freedom of movement. Clean, re-grease & replace. Clean line or increase line size. Remove obstruction. Replace diaphragm.

Replace shaft seals. Check all seals in valve chest assembly. Re-connect to air inlet.

Replace diaphragm. Check and remove obstruction. Check and correct. Replace diaphragm.

Replace shaft seals. Check all seals in valve chest assembly.

Shorten suction line. Check and correct. Check and remove obstruction / replace. Clear. Replace diaphragm.

Replace diaphragm. Re-Torque to manual specifications.

Shut-down pump. Remove air connection into pump & introduce a small quantity of degreasing agent into air valve and replace line. Run pump until clear. Replace seals. Check all seals in valve chest assembly. Clear obstruction.

WARNING!

Read these safety warnings and instructions in this manual completely, before installation

the responsibility of the purchaser to retain this manual for reference. Failure to comply with the recommendations stated in this manual will damage the pump, and void factory warranty.

and start-up of the pump. It is

WARNING!

Before doing any maintenance on the pump, be certain all

from the pump, suction, discharge, piping, and all other openings and connections. Be certain the air supply is locked out or made non-operational, so that it cannot be started while work is being done on the pump. Be certain that approved eye protection and protective clothing are worn all times in the vicinity of the pump. Failure to follow these recommendations may result in serious injury or death.

pressure is completely vented

WARNING!

Airborne particles and loud noise hazards. Wear ear and eye protection.

WARNING!

Before maintenance or repair, shut off the com-pressed air

disconnect the air line from the pump. The discharge line may be pressurized and must be bled of its pressure.

line, bleed the pressure, and

WARNING!

Take action to prevent static sparking. Fire or explosion can

handling flammable liquids. The pump, piping, valves, containers or other miscellaneous equipment must be grounded.

result, especially when

IMPORTANT!

This pump is pressurized internally with air pressure

certain that all bolting is in good condition and that all of the correct bolting is reinstalled during assembly.

during operation. Always make

WARNING!

When used for toxic or aggressive fluids, the pump should always be flushed clean prior to disassembly.

WARNING!

In the event of diaphragm rupture, pumped material may

and be discharged into the atmosphere. If pumping a product which is hazardous or toxic, the air exhaust must be piped to an appropriate area for safe disposition.

enter the air end of the pump,

CAUTION!

Before pump operation, inspect all gasketed fasteners

ket creep. Re-torque loose fasteners to prevent leakage. Follow recommended torques stated in this manual.

for looseness caused by gas-

RECYCLING

Many components of BLAGDON air operated double diaphragm pumps are

We encourage pump users to recycle worn out parts and pumps whenever possible, after any hazardous pumped fluids are thoroughly flushed.

made of recyclable materials.

HG-CF-1109 Rev. D – 03.11.11

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IMPORTANT!

Read these instructions completely, before

installation and start-up. It is the responsibility of the purchaser to retain this manual for reference. Failure to comply with the recommendations stated in this manual will damage the pump, and void factory warranty.

SERVICE

The following sections give a general overview on how to service all models of BLAGDON Diaphragm Pumps. For details on individual part numbers, quantities, materials, etc., please consult the parts list supplied with the pump.

NOTE : Before commencing any service or maintenance work on the pump, ensure that the air supply has been disconnected or isolated.

AIR VALVE SYSTEMS

PNEUMATIC TYPE Remove the 4

screws securing the valve block to the valve chest, together with any associated gaskets or seals.

Remove slide valve plate & slide valve from the valve block assembly. Clean all parts thoroughly and inspect for excessive wear, replacing where necessary.

The slide valve and valve plate contact faces should be flat and free from scratches. A light polishing on a flat surface with a fine abrasive paper will remove most scratches.

If excessive wear is suspected in the valve block bore or valve carrier, remove the valve block plugs and withdraw the valve carrier. Check valve block plug o-rings for wear or attack & replace where required.

Clean the valve carrier & valve block bore with white spirits to remove any oil films.

NOTE : The nominal diametrical clearance between the valve carrier and the valve block block bore should be 0.05 -

0.09mm. A clearance in excess of this will cause the valve system to run erratically.

Apply a light grease to the valve block plug O-rings when reassembling into the valve block bore. Any damage to the O-ring may cause

the valve system to malfunction.

Re-assemble the valve block assembly & re-torque in accordance to the settings shown in the parts list.

In the event of a complete air-side overhaul, the pump should be disassembled down to the centre section assembly as described later in the “Wet-Side Overhaul” section.

With the valve block assembly dismantled, remove the inner covers where appropriate.

A careful note of the position of all related seals and gaskets should be made to facilitate re-assembly.

Remove diaphragm shaft bushes, where appropriate, and check all seals and ‘O’ rings for wear or damage. If worn, replace immediately.

NOTE:- The integrity of the diaphragm shaft seals is essential for the correct functioning of all pneumatically actuated valve systems.

Check the diaphragm shaft for excessive wear as this will result in premature seal failure. Replace as required. Lubricate all components and re-assemble as detailed above, in reverse order. Ensure the correct position of all components detailed in all sectional assembly drawings.

WET-SIDE OVERHAUL

REPLACING BALL VALVES

Remove discharge manifold from pump assembly together with associated valve balls, seats and ‘O’ rings.

NOTE :- The orientation of the valve seat relative to the valve ball should be noted as incorrect positioning may result in a performance loss.

Turn pump through 180 the suction manifold. Clean and inspect the components. Check for any wear or damage and replace as required.

NOTE :- Ball or valve seat wear may result in loss of performance and suction lift.

Re-assemble the valve balls/seats and ensure manifolds are adequately torqued to the settings shown in the parts list.

and remove

REPLACING DIAPHRAGMS Remove both suction and discharge manifolds as detailed in the previous section, removing all ball valves, seats and ‘O’ rings.

Loosen and remove both outer covers from the pump assembly. The orientation of the covers should be noted so as to facilitate reassembly.

Holding one of the frontplates in a vice, (‘soft jaws’ should be fitted), or with an adjustable spanner, loosen and remove the frontplate from the opposite end. Remove the diaphragm, backplate and bumpstop from diaphragm shaft.

Carefully withdraw the diaphragm shaft from the centre section and hold the free end in a vice, holding between the flats machined on the end. Loosen and remove the frontplate and remove the diaphragm together with backplate and bumpstop (where fitted).

NOTE :- Care should be taken with all plastic, coated and hygienic pumps, so that the surface of the frontplate is not damaged.

Thoroughly clean all parts and check for wear, damage, swelling, cracking, delamination and chemical attack.

Replace components where required.

NOTE :- Rubber diaphragms should be replaced if they are worn to such an extent that the fabric re-enforcing is evident on the surface of the diaphragm.

For pumps fitted with PTFE diaphragms, a light coating of grease should be applied to the back-up diaphragm prior to re-assembly.

Before re-assembly, it is advisable to check the condition of the diaphragm shaft seal/’O’ rings for wear or attack. If either is evident, it is recommended that they be replaced.

Assemble the diaphragms onto the shaft in a reverse sequence to their removal. Care should be taken as to the orientation of the diaphragm relative to the front and back plates. All diaphragms have “AIR SIDE” moulded onto one side. The backplate must be fitted adjacent to the AIR SIDE of the diaphragm.

HG-CF-1109 Rev. D – 03.11.11

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









TRANSITION PLATE (ALL C.IRON ONLY)

COMMON CAST IRON

PART NUMBER DESCRIPTION QTY

PARTS LIST - cont.

38 1B123 PORT SEAL (ALL C.IRON 2 OFF)

39 - 50-273

40 50-261 VALVE BLOCK SEAL

41 50-248 SLIDE VALVE PLATE

42 50-251 SLIDE VALVE

43 H125 CIRCLIP

No.

REF

44 1C021 VA LVE BLOCK PLUG



45 G130 O-RING



VALVE BLOCK - BSP

46 50-246







DIAPHRAGM O-RING

VALVE

BALL - WTD.

VALVE BLOCK - NPT

BALL

VALVE

ELASTOMER TABLE

SEAT

50-247

47 1B124 VALVE CARRIER

48 1B039 DIAPHRAGM - PTFE

49 1B054 SUPPORT DIAPHRAGM

QTY. 2 2 2 1 4

REF. NO 2 3 3 8 15

MATERIAL VALVE

BUNA-N - 1B010 1B079 1B004 G029

EPDM - 1B052 1B080 1B002 G031

VITON - 1B055 1B088 1B003 G119

NEOPRENE - 1B056 1B027 1B001 G149

PTFE - 1B053 - SEE 48 & 49 G111

ONE-PIECE PTFE - - - 50-221 -

POLYESTER - - - 1B029 -

DELRIN - 1B065 - - -

POLYURETHANE - - - 1B048 -

ST. STEEL 50-292 1B109 - - -

SANTOPRENE - - - 50-233 -

DESCRIPTION

ALUMINIUM 50-293 - - - -

 - These items are available in a recommended spares kit. Please refer to your local stockist / distributor for details.

Note! Wet Side Kits only include valve seats if the original parts were rubber :- i.e. Buna-N, Neoprene etc.  - These items are available in a recommended spares kit. - ASK5005 - Air side kit.  - These items are available as Valve Block Sub-Assy’s - SA10592 & SA10503, all Cast Iron models.  Note! These O-Rings are only used with metallic seats and blanking discs, items 14 & 16

#NOTE! Pumps trimmed with EPDM, Viton or PTFE fluid diaphragms are fitted with Neoprene air side diaphragm (1B001)











4/2















SUCTION MANIFOLD - BSP

SUCTION MANIFOLD - NPT

50-259

DISCHARGE MANIFOLD - NPT

50-260 DISCHARGE MANIFOLD - BSP

BLANKING DISC

50-265

ALUMINIUM CAST IRON

PARTS LIST

PART NUMBER DESCRIPTION QTY

HG-CF-1109 Rev. D – 03.11.11

1 50-254

No.

REF

50-274

2 SEE TABLE VALVE SEAT - ELASTOMER

3 SEE TABLE VALVE BALL

4 50-253 50-258 OUTER COVER

5 SA10042 SA10043 FRONTPLATE ASSEMBLY

6 1B015 BUMP STOP

7 1B021 BACKPLATE

8 SEE TABLE DIAPHRAGM - FLUID SIDE

9 1B156 1B157 INNER COVER - TAPPED

10 50-255

11 D028 SOCKET CAP SCREW M8 x 25

12 C165 SPRING WASHER

13 1B026 1B073 INNER COVER

14 SEE TABLE VALVE SEAT - METALLI C

15 SEE TABLE O-RING, (SEE NOTE )

16 1B148 1B152

17 50-294 50-298 OUTER COVER - AIR SIDE

18 1B001 DIAPHRAGM - AIR SIDE

19 SA10042 FRONTPLATE - AIR SIDE

20 SP165 HOSE ASSEMBLY

21 D5027 DOWTY WASHER

22 SP172 HEX. ADAPTOR

23 SP166 ELBOW FITTING

24 A063 BOLT M10 x 40

25 C026 WASHER M10

26 B027 NUT M10

27 A041 BOLT M8 x 30

28 C013 WASHER M8

29 A496 BOLT M10 x 100

30 1B114 SILENCER

31 SA10041 DIAPHRAGM SHAFT ASSEMBLY

32 G091 O-RING

33 50-315 DIAPHRAGM SHAFT BUSH

34 G112 O-RING

35 50-257 1B129 VALVE CHEST

36 50-207 DIAPHRAGM SHAFT LIP SEAL

37 - G205 O-RING (ALL C.IRON ONLY)

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Outer Seal - Lips face outwards. Inner Seals - Lips face in

towards groove with holes.

Sectional General Assembly :- B50 05 Metallic Pump

Refer to page 8 Parts List table for Item Ref. Nos.

Orientation of Lip Seals in Bushes.

HG-CF-1109 Rev. D – 03.11.11

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HG-CF-1109 Rev. D – 03.11.11

Date : December 01 2009

Des Monaghan, Production & Technical Manager

HG-CF-223 (REV 5)

Page 10

Blagdon Pump B50 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual