Blagdon Pump 25 Series Service And Operating Manual Download Page 13

HG-CF-1101 Rev. C – 19.05.06 

Page 13 

Atex Certified Models 

 
T a k e 
a c t i o n 
to prevent static sparking. Fire or explosion can result, 
especially when handling flammable liquids. The 
pump, piping, valves, containers or other 
miscellaneous equipment must be grounded. 

WARNING! 

When used for toxic or aggressive fluids, the pump 
should always be flushed clean prior to disassembly. 
User must ensure chemical compatibility, and any 
pressure / temperature limits are not exceeded. These 

instructions include all the information for relevant diaphragm temperature 
limits. Pump temperature range can also be found on data-plate attached to 
the pump. 
If pump is not used for more than 5 days, care must be taken when restarting. 
If in any doubt, remove pump from line and flush with a suitable cleaner. 
Solidified deposits within the pump may cause damage to the diaphragms. 

WARNING! 

Before pump operation, inspect all gasketed fasteners for 
looseness caused by gasket creep. Re-torque loose 
fasteners to prevent leakage. Follow recommended 
torques stated in this manual. In cases of excess vibra-
tion, Blagdon recommend fitting a Pulsation Dampener to 

remove effects of pulse actions from pump operation. Flexible connections 
can be used, but must be kept to a minimum length necessary to avoid sharp 
flexing or straining movements. 

CAUTION! 

In the event of diaphragm rupture, pumped material may 
enter the air end of the pump, and be discharged into 
the atmosphere. If pumping a product which is hazard-
ous or toxic, the air exhaust must be piped to an appro-
priate area for safe disposition.

 

WARNING! 

Grounding the pump :- 

All models are certified as shown on page 1 of this manual. 
Maximum temperature of fluid to be handled must be specified at time 
of order. Pump must be marked with this information. For grounding 
details see below. 

This unit is supplied with a natural earth ground cable. This cable is 2 
meters in length and permanently connected through a stud at one 
end to the pump centre casting. The other end is free to connect to 
the nearest available suitable point to provide a natural earth ground. 
This must be done to reduce the risk of electro-static sparking. 
 
Refer to table on Page 8 for details and relevant Part Numbers. 

This unit is supplied with a natural earth ground cable. 
This cable is 2 meters in length and permanently con-
nected through a stud at one end to the pump centre 
casting. The other end is free to connect to the nearest 
available suitable point to provide a natural earth 
ground. This must be done to reduce the risk of electro-
static sparking.  

 
 
 
Take action to prevent static sparking. Fire or 
explosion can result, especially when handling 
flammable liquids. The pump, piping, valves, 
containers or other miscellaneous equipment must be 
grounded. 

WARNING! 

Summary of Contents for 25 Series

Page 1: ... ANSI 150 Atex Certified models NOTE Refer to pump Typical Code matrix on page 6 to determine the full Model No of your pump Please read all warnings and instructions before using this product IMPORTANT This pump should be used in accordance with the requirements of the Health and Safety at Work Act 1974 All business conducted subject to Blagdon Pump Terms and Conditions of Sale available on reque...

Page 2: ... Installation guide 4 Trouble Shooting 5 Technical Data 5 Temperature Limitations 6 Explanation of Pump Nomenclature 6 Dimension drawing Standard 7 Dimension drawing Flanged 7 Parts List 8 Expolded View 9 Flanged Manifold Table 10 High Temperature Specification 10 Exhaust Safety Instructions 10 Performance Curve Re Assembly of Outer Covers 11 Warranty 12 Service 12 Air Side Overhaul 12 Wet Side ov...

Page 3: ...rt in a hazardous manner WARNING Before doing any maintenance on the pump be certain all pressure is completely vented 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 ...

Page 4: ...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 lo...

Page 5: ... but will not discharge Excessive suction lift Suction line leakage Valve ball not seating correctly or damaged Suction line or strainer clogged Diaphragm failure Shorten suction line Check and correct Check and remove obstruction replace Clear Replace diaphragm Fluid discharged from air exhaust Diaphragm Failure Loose frontplate Replace diaphragm Re Torque to manual specifications Intermittent st...

Page 6: ...hemicals are known to react chemically with PTFE mol ten 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 212o F 100o C 32o F 0o C 50o to 212o F 10o to 100o C Viton Shows good resistance to a wide range of oils and solvents especially all alphatic aromatic an...

Page 7: ...sion drawing Standard Dimension drawing Flanged 1 ANSI 150 NOTE All dimensions are 2mm both manifolds shown in Opposed layout to standard orientation NOTE All dimensions are 2mm both manifolds shown in Opposed layout to standard orientation ...

Page 8: ...25 194 VALVE SEAT 4 21 G431 O RING 4 22 25 183 SPACER VALVE CHEST 4 23 25 191 25 181 VALVE CHEST 1 24 G243 O RING 2 25 G242 O RING 2 26 B043 NUT M8 20 27 25 177 RING INNER OUTER COVER 4 28 25 190 25 180 INNER COVER 2 29 D380 SOCKET C SUNK SCREW M8 x 30 8 30 25 189 25 173 OUTER COVER 2 31 A497 BOLT HEX HD M8 x 140 16 32 25 195 BASE LEG 2 33 C173 SPRING WASHER M8 8 34 1H024 BASE PAD 4 35 1H033 BASE ...

Page 9: ...y TORQUE SETTINGS A FRONTPLATE 35 38 Nm 26 28 lbs ft B OUTER COVERS 6 2 6 7 Nm 55 60 lbs in MANIFOLDS 4 5 Nm 40 lbs in VALVE BLOCK 4 5 Nm 40 lbs in C Spares Kits Wet Side Kits Air Side Kits Valve Block Sub Assemblies See page 14 for all available kits ...

Page 10: ...mp can continue to run with air being forced into the product being pumped If however the failure is more serious then the pump may stop with fluid or fumes being expelled through the exhaust Under these conditions it is recommended that the exhaust is piped away to a safe area In standard suction lift conditions this can simply be done by piping from the exhaust connection to a safe area Multiple...

Page 11: ... Covers When re assembling the pump after any service or maintenance work both Outer Covers must be re torqued using the sequence shown above The orientation of the pump is not important providing the above sequence is followed Failure to comply with these instructions may result in poor sealing and mis alignment between the diaphragm sealing faces ...

Page 12: ... 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 180o and remove the su...

Page 13: ...lexing or straining movements CAUTION In the event of diaphragm rupture pumped material may enter the air end of the pump and be discharged into the atmosphere If pumping a product which is hazard ous or toxic the air exhaust must be piped to an appro priate area for safe disposition WARNING Grounding the pump All models are certified as shown on page 1 of this manual Maximum temperature of fluid ...

Page 14: ...elow 1 If pump model number includes a revision number then this is added where shown below Please refer to either the pump nameplate or the operating manual provided with the pump if this is to be included i e B0601SSBBTTS NOTE This part number system does not apply to pumps designated B4001 B5001 or B7501 Please consult the pump Service Operating Manuals for Wet Side Kit numbers for these models...

Page 15: ...e Maintenance Log RECYCLING Many components of BLAGDON air operated double diaphragm pumps are made of recyclable materials We encourage pump users to recycle worn out parts and pumps whenever possible after any hazardous pumped fluids are thoroughly flushed Notes ...

Page 16: ...01 Rev C 19 05 06 Page 16 BLAGDON PUMP A Unit of IDEX Corporation Lambert Road Armstrong Washington Tyne Wear NE37 1QP England Tel 44 0 191 4177475 Fax 44 0 191 4175435 Jeff Sill General Manager HG CF 223 REV 4 ...

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