Doc No: OMM50002312
Rev: C Page 32 of 54
Subject to contractual terms and conditions to the contrar
y, this document and all the information contained herein are the confidential and exclusive
property of FMC Technologies, and may not be reproduced
, disclosed, or made public in any manner prior to express written authorization by FMCTI.
If the discharge valves need to be serviced, but the suction valves do not,
the Installation and Knock Out tool may be inserted through the cylinder
cover hole to knock loose only the discharge valve (topmost valve,
pictured above). The tool will be at an angle so care must be taken to
avoid injury or damage to the tapered seat in the tool is not properly
positioned against the bottom of the valve seat.
10.3.2 Replacing W11 Disc Type Valves
The disc type valve used in W11 FMC pump models is shown in Figure 5. The standard
construction of stainless steel seat, disc, and stop are a relatively simple design with
excellent performance and ample life. These valve assemblies come pre-assembled
from the factory and should not need to be disassembled.
Figure 5: Typical W11 Disc Valve Assembly
When a worn or malfunctioning valve is detected, it must be replaced. With disc valves,
the most difficult task associated with replacing a valve is the removal of the seat from
the fluid cylinder. The seats are held into the fluid cylinder with a matching force fit
taper.
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