FMC Corporation - Talstar FMC L06 - Manual (Page 42)

Doc No: OMM50000903
Rev: B Page 42 of 65
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10.3.1.6.2 Installing Larger, Non-Factory Torqued AR Valves
The suction valve must be installed before the discharge valves. The following
reassembly procedure is applicable for both.
1. Select a new valve seat. Disassembly of a new valve assembly may be
necessary. Do not install complete assembled valves.
2. Carefully clean the taper in the fluid cylinder and on the valve seat with a cleaning
solution and a clean cloth. Small scratches can be removed with steel wool or
100 grit emery paper. Remove all dirt, grease, oil, water, or any other
contaminants from the surfaces. Do not oil the seats or the seating surfaces in
the fluid cylinder. Confirm that they are dry before installation.
3. Position the valve seat directly over the mating taper in the fluid cylinder.
4. Let the seat drop into the taper. Check to see that the seat is sitting in the taper
properly and not cocked to one side. If the valve drops straight, it will seize on the
taper. When correctly seated, it cannot be pulled up by hand.
5. Place a flat clean piece of brass or plastic on the face of the seat. If available, an
old valve disc will work well. With a metal rod or punch, strike the end of the tool
two times with a hammer to seat the valve.
6. After the seat is secured in the fluid cylinder, the valve must be assembled. Apply
anti-seize solution to the cage threads before threading onto the seat. Care must
be taken when threading the cage onto the seat. This is a very fine thread and
can easily be damaged by cross-threading. Tighten the cage against the o-ring
which acts as a thread locking device. Torque the cage to 30 ft-lbs.
NOTE: Use the hex cage removal tool for reassembly. The tool is shown in Figure 7.