Doc No: OMM50001243
Rev: C Page 40 of 68
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10.3.1.4
Threaded Type (AR Valves Only)
The threaded type can only be used on valves that have the through bore of the seat
threaded prior to installation. The load capacity is similar to the Mandrel Type but it is
simpler to use. This is the last variation of methods of applying tension to the valve
seat to remove it from the fluid cylinder.
Again the valve must be disassembled with the cage, spring and valve body removed
leaving only the seat in the fluid cylinder prior to use of the puller.
A threaded adapter is screwed into the seat after the cage, spring, and valve body have
been removed. An adapter nut mates the threaded section to the tension rod, strong
back and other parts used on the Eccentric Type to apply tension and then impact
loading to remove the seat from the fluid cylinder.
The threaded seat is new to the FMC product line and as such it is being used on
applications where the removal force for the seat is expected to be high. With high
removal forces required, the hydraulic puller is recommended over the nut, bumper,
strong back, and puller assembly.
Figure 13: Threaded Tool in use
Adapter nut, threads on to the
threaded tension rod and the
threaded adapter.
Valve Seat with internal threads,
Fluid Cylinder not shown
Female Thread
Threaded Adapter