Filter
Top Products
PFD4/PFS4 – OPERATING INSTRUCTIONS
INDEX DATE N°
03 22/04/02 DC04020US
6/8
Before dismantling the pump, check the following:
• The air/nitrogen supply is OFF,
• The chemical and discharge lines are empty, and there is no pressure,
• All in line valves are closed,
• You follow your local Health and Safety regulations with regard to particular chemicals.
V.2 – Preventive maintenance
Important: for “W” pumps, PTFE body seals (P/N 2593, Mark C) and PFA manifold seals
(P/N 2592, Mark F) must be changed each time you disassemble the pump. For “G” pumps,
PTFE body seals (P/N 2593, Mark C) must be changed each time you disassemble the pump.
Retighten manifold nuts simultaneously and progressively with a strap wrench in order to
ensure a correct tightness.
V.2.1 – Continuous operation
When the pump is used continuously, it is necessary to replace the following parts every year:
• Central shaft O.rings P/N 2496
• Central shaft P/N 2477
Important: the central rod and central rod O.rings should always be replaced together.
During routine maintenance checks, examine the following parts, and change them if necessary:
• Bellows P/N 6530 (PFD) or 2309S (PFS)
• Shuttle valve system P/N 2493
• Viton bellows O.rings P/N 4813
• FEP body O.rings P/N 2491S
• Manifold O.rings P/N 2632S and 2632K
• Suction lip seals P/N 2629 (PFD) or 2629A (PFS)
• Delivery lip seals P/N 2630 (PFD) or 2630A (PFS)
• Check valves P/N 2633
• Silencers P/N 2494
V.2.2 – Intermittent operation
If the pump is used intermittently, it is advised to replace all wearing parts every 18 months (shaft
composite rings and central shaft) and to check other parts (bellows, shuttle valve system, other
O.rings, lip seals...).
If the pump is left standing full of chemical for long periods all the Viton O.rings should be replaced.
V.3 – Comments
If the pump is used to pump hot chemicals in excess of 140°F (60°C) the preventive maintenance
schedule time scale should be divided by 2:
• Every 6 months check as for continuous operation,
• Every 9 months check as for intermittent operation.
The above is based on SGPPL ASTI’s experience.
SGPPL ASTI cannot be held responsible for premature failures if the pump is misused, or
damaged due to an incorrect application.