PFD2/PFS2 – OPERATING INSTRUCTIONS
INDEX
DATE
N°
03
26/06/01
DC02020US
6/11
If the pump starts, check that the following was not the cause:
•
The air/nitrogen connections (See III.3.1),
•
The air/nitrogen quality,
•
Has the pump been serviced correctly? (See V.2 Preventive maintenance).
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 2588) and PFA manifold seals (P/N 2587)
must be changed each time you disassemble the pump. For "G" pumps, PTFE body seals
(P/N 2588) 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:
•
Shaft composite rings
P/N 7135F
•
Central shaft
P/N 2761
Important: these parts should always be replaced together.
During routine maintenance checks, examine the following parts and change them if necessary:
•
Bellows
P/N 2760 (PFD) or 2760S (PFS)
•
Shuttle valve
P/N 2701
•
Viton bellow O.ring
P/N 2724
•
FEP body O.ring
P/N 2738
•
FEP manifold O.ring
P/N 2464
•
Lip seals
P/N 2759 (PFD) or 2759A (PFS)
•
PTFE sleeves
P/N 7220
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, 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.
VI – Dismantling and Repair
Attention:
Part numbers quoted in this manual are those used on a "standard" PFD/PFS pump.
Before ordering, please check the spare parts list, the section view of the pump and the part numbers
table (see encl. documents).
