Doc No: OMM50001243
Rev: C Page 34 of 68
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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 7 with valve
components identified in the exploded view to the right.
Figure 7: 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. For applications involving pressures of 5000
psi or more, FMC recommends the use of AR valves with threaded through bores.
Refer to Section 10.3.1.4 for the threaded type puller.
FMC provides two types of tools that can be used to remove the AR type valves in the
M06 pumps. 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. Each have
advantages and disadvantages. Reference Section 10.3.3 for tooling part numbers.
Cage
Spring
Valve Body
Thread Locker
(O-Ring)
Valve Seat
