PFD4/PFS4
– OPERATING INSTRUCTIONS
INDEX
DATE
N°
03
22/04/02
DC04020US
8/8
Caution
: To tighten the 16 nuts, you need a torque wrench (tightening couple: 7 N.m -
Cross
tightening)
.
VI.3.3 – Replacing the central shaft and shaft O.rings
Disassemble the shuttle valve system (See VI.3.1, step 3) and follow the steps described in VI.3.2
until 6). Unscrew the bellows and:
7) Remove the central shaft (P/N 2477),
8) Remove the 2 shaft O.rings (P/N 2496),
9) Clean up the supports (P/N 2472 and 2473) and core (P/N 2474), ensure any dust due to previous
O.rings wear is removed and all parts are clean.
10) Correctly replace the new rings,
11)
Important
: when re-assembling central shaft, lightly wipe it with
silicon grease (Molykote 111)
,
12) To re-assemble, follow the above but in reverse order.
VI.3.4 – Replacing the bellows and body O.rings
After removing the bellows (See VI.3.2, step 6), remove the bellows (P/N 4813) and body O.rings
(P/N 2491S or 2593, Mark C). Carefully replace the new ones
without scratching the surface of the
bellows (P/N 6530 or 2309S, Mark B) and bodies (P/N 2741 or 2471G, Mark I).
VI.3.5 – Replacing manifold O.rings
Follow point VI.3.2, steps 1) and 2). Carefully replace the manifold O.rings (P/N 2632S and 2632K,
Mark F). Take care, as these parts are fragile,
especially the elbow connectors
.
If your pump is marked with
“W”
, change the manifold seals (P/N 2592, Mark F) and retighten
progressively with a strap wrench.
NB
: This chapter does not concern PFD/S4…
G
pumps that have no manifold seals.
VI.3.6 – Replacing other parts
When dismantling the pump or control unit for service, components found damaged should
be replaced. Alternatively, the pump/control unit can be returned to your distributor or SGPPL
ASTI for examination, estimate, and repair.
Important
: Please indicate what chemical was handled, the frequency of use, and the reason for
returning the pump.
A receipt note “Conditions of use” is at your disposal. Do not hesitate to ask for it when needed.
An estimate for repair will be proposed to you and the pump will be returned to you within one week
from date of its acceptance.
VII – Warranty
SGPPL ASTI pumps and accessories are warranted for all parts and labor against faulty workmanship
(return to factory) for one year from delivery date (9000 hours of use).
SGPPL ASTI is not responsible for damage to its products through improper installation,
maintenance, use or attempts to operate them beyond their mechanical capacity, intentionally or
otherwise, or for unauthorized repair.
SGPPL ASTI shall not be liable for any indirect, special, incidental or consequential damages
resulting from the use, failure or malfunction of any product.
® Du Pont's registered trademarks
™ Saint-Gobain Performance Plastics Asti's registered trademark
