Saint Gobain Vidros PFD1 - Manual (Page 8)

PFD1/PFS1 – OPERATING INSTRUCTIONS
INDEX DATE N°
03 27/09/01 DC01020US
7/11
VI.1 – How to dismantle
Before dismantling the pump, refer to the Maintenance schedule V.1, and proceed as follows:
•
Disconnect the air/nitrogen supply,
•
Remove the inlet and outlet connections (beware of any chemical droplets remaining on the inside),
•
Rinse the outside of the pump in DI water to remove all trace of chemicals,
•
Remove pump support screws.
VI.2 – Examination
To comply with your local Health and Safety Regulations it is essential the pump and all parts are
thoroughly cleaned both on the inside and outside.
See V.2 for the Preventive Maintenance Schedule.
To repair the pump, refer to schedules V.1 and V.2.1.
VI.3 – Stripping and assembling the pump
The SGPPL ASTI design ensures that the pumps are easy to strip and assemble.
The only tools required are a screwdriver to replace the shuttle valve (see VI.3.1) and a strap wrench to
remove body rings (P/N 2706, Mark L). All other items can be removed and replaced by hand. A tools kit
for the whole maintenance is available (P/N KPFD1), as well as maintenance kits
(P/N AIR PFD1, LIQ PFD1, and MEC PFD1), and a preventive maintenance box (P/N PM PFD1 or PM
PFS1). For more details on these kits, please report to appendix documents.
Please refer to drawing “APP 1 REF” to visualize marks and part numbers quoted hereafter.
VI.3.1 – Replacing the shuttle valve
The valve is easily removed from the outside:
1) Unscrew the 2 fastening screws – take care not to damage them,
2) Replace with a new factory assembled shuttle valve (P/N 2701, Mark A),
3) Carefully tighten the 2 fastening screws. Do not overtighten,
4) Test with compressed air/nitrogen. Re-tighten if necessary.
VI.3.2 – Replacing the bellows
To replace the bellows proceed as follows:
1)
Remove shuttle valve (P/N 2701, Mark A) (see VI.3.1),
2) Unscrew exhaust silencers (P/N 7185),
3) Unscrew the 4 manifold nuts and remove the 4 balls valves (P/N 2712) – take care not to lose them,
4) Remove the 4 manifold O.rings (P/N 2745, Mark G ) ,
5) Position the pump into a bench vice (tighten only over the core P/N 2708),
6) Unscrew the body ring (P/N 2706, Mark L) with a strap wrench while holding the PFA body,
7) Remove the pump body (P/N 7145, Mark K),
8) Now unscrew the bellows (P/N 2613 or 2613S, Mark F) from the central shaft (P/N 2615,
Mark D),
9) Replace with new bellows – moderately hand tighten,
10) To re-assemble follow the above but in reverse order from 8) to 1).
All TEFLON
® PTFE and PFA parts are soft; please handle with care to avoid damage. Do not put them
down on their sealing surfaces.
To re-assemble the PFA bodies, hand tighten the body rings (P/N 2706, Mark L), and block them up by
giving 1/8 further turn with the strap wrench. Check that bodies are well positioned so that manifolds are
tight.