Blagdon Pump B50 User Manual

Page 1
SERVICE & OPERATING MANUAL
B50
AIR OPERATED
DOUBLE DIAPHRAGM PUMP
B50 05 Metallic Series
Aluminium & Cast Iron
High Pressure W1 Series
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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Page 2
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
o
80
C
212oF
o
100
212oF
o
100
212oF
o
100
356oF
o
180
356oF
o
180
158oF
o
70
C
C
C
C
C
C
-18oF
o
-28
-11oF
o
-24
-4oF
o
-20
-10oF
o
-23
32oF
o
0
C
0oF
o
-18
-40oF
o
-40
C
C
C
C
C
C
50o to 140oF
o
10
to 60oC
50o to 212oF
o
10
to 100oC
50o to 130oF
o
10
to 54oC
50o to 212oF
o
10
to 100oC
50o to 212oF
o
10
to 100oC
75o to 212oF
o
24
to 100oC
50o to 140oF
o
10
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
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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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
1
Pipe Connection (Style Optional)
Flexible
Connection
Filter Regulator/Lubricator
Gauge
Drain Port
event of diaphragm failure.
Shut-off
Valve
Air Dryer
2
3
DISCHARGE
Air Shut-Off
Valve
AIR INLET
4
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.
o
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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1
1
1
1
1
2
2
2
1
1
1
1







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)
1
2
2
1
1
2
2
1
1
1



4
1
2
2
1
1
1
1
3
2
16
4/2


1
16
24
24
8
1
1
4
2
2
1
6
16
16


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)
Page 8
Page 9
Outer Seal - Lips face outwards. Inner Seals - Lips face in
towards groove with holes.
36
Sectional General Assembly :- B50 05 Metallic Pump
33
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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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
HG-CF-1109 Rev. D – 03.11.11
Date : December 01 2009
Des Monaghan, Production & Technical Manager
HG-CF-223 (REV 5)
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