FMC Corporation - Talstar FMC L06 - Manual (Page 31)

Doc No: OMM50000903
Rev: B Page 31 of 65
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10.3.1 Replacing AR Valves
10.3.1.1 Introduction
The AR, Abrasion Resistant, valve is a durable wing-guided, spring-loaded check valve.
It is used with abrasive fluids, bentonite mud, water, oil etc., and provides excellent
performance and long service life. A typical valve is shown in Figure 5 with valve
components identified in the exploded view to the right.
Figure 5: AR Valve Assembly
The primary difficulty in removing an AR Valve is associated with the removal of the
tapered seat from the matching locking taper in the fluid cylinder. If the pump is used
for discharge pressures in excess of 3,000 psi or for corrosive fluids, this can be a
difficult task requiring specialized tooling.
FMC provides four types of tools that can be used to remove the AR type valves. Some
of the tools are specific to the pump model; some are used only with specific valves and
others can be used with any AR installation. They each have advantages and
disadvantages. Refer to section 13, Valve Removal and Installation Tools, Table 7 for
the appropriate tool recommendations.
Cage
Spring
Valve Body
Thread Locker
(O-Ring)
Valve Seat