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PFD4/PFS4 – OPERATING INSTRUCTIONS
INDEX DATE N°
03 22/04/02 DC04020US
5/8
IV.4 – Applications
The PFD4/PFS4 pump is a volumetric pump.
Each impulse delivers a constant unit stroke (about 900 cc/unit stroke).
A leak detector (in case of bellows failure) can be fitted on each pump body (female thread M8 on
each half body (P/N 2472 and 2473).
• Part number marked K (PFD4 322K or PFS4 322K) indicates that the pump will be supplied with
KALREZ
®
manifold O.rings (P/N 2632K, Mark F) and body O.rings (P/N 2491K, Mark C).
• Part number marked W (PFD4 322W or PFS4 322W) indicates that the pump will be supplied
with PFA manifold seals (P/N 2592, Mark F), PTFE body rings (P/N 2593, Mark C), and special
manifolds (P/N 2591M or 2599M, Mark G).
• Part number marked G (PFD4 322G or PFS4 322G) indicates that the pump will be supplied with
special manifolds with no seals (P/N 2430G or 2435G, Mark G) and PTFE body rings (P/N 2593,
Mark C).
PFS4 pumps are equipped with valve seats without lip (P/N 2629A and 2630A, Marks D and E) and
rounded spires bellows (P/N 2309S, Mark B) in order to pump abrasive products (slurry).
Common applications are:
• Semiconductor Industry: Transfer of ultrapure and corrosive chemicals.
Pump filter recirculation systems.
• Pharmaceuticals and Chemicals: Chemical injection and sampling.
IV.5 – Limitations of use
The standard speed of PFD4/PFS4 pump is about 100 strokes/minute.
The following should NOT be part of the system:
• Do not connect the pump inlet or outlet with air, nitrogen or liquid under pressure.
• Lubricated and/or wet air or nitrogen,
• Air supply tubing greater than 3/8” (10 mm),
• Air line length between the pump and control valve less than 10 feet (3 m) and more than
19 feet (6 m),
• Air pressure less than 29 PSI (2 bar) or more than 72.5 PSI (5 bar),
• Inlet connection less than 7/8” (22 mm),
• Restricting inlet (valve, filter...),
• Exceed the recommended liquid temperatures,
• Pumping too viscous or abrasive liquids.
Any of the above can be detrimental to the normal operation and life expectancy of the pump, and
may invalidate the warranty.
If the pump is used with very corrosive chemicals and left for extended periods not in use, we
recommend the system is emptied and flushed.
V – Maintenance
V.1 – Trouble shooting
If the pump stops for any reason, check:
• The air/nitrogen supply,
• That all valves in the chemical line are open,
• That pneumatic screws (P/N 2478) are correctly tightened.