Instruction Manual
D103312X012
GX 3-Way Valve and Actuator
August 2011
16
d. Insert the socket onto the hex head of the seat ring or cage tool.
WARNING
Be careful to hold the torque gun, attached socket, and tool at right angles to the seat ring or cage when applying torque.
Tilting the gun and socket while applying torque may cause the lugs on the seat ring or cage tool to suddenly disengage
from the lugs on the seat ring or cage thus causing possible damage to the seat ring or cage and possible personal injury.
3. Removetheseatringorcage(key2)fromthevalvebody.
4. Inspect parts for wear or damage that would prevent proper operation of the valve.
Side-Port Common Trim Assembly
Refer to figure 9.
1. Before installing the new seat ring, thoroughly clean the threads i n the valve body. Apply suitable lubricant to the
threads and to the radius surface of the seat ring (key 2). Screw the seat ring into the valve body. Using the seat ring
tool, tighten the seat ring and torque according to the values in table 7. Remove all excess lubricant after
tightening.
2. Clean the body/yoke gasket surfaces and install a new body/yoke gasket (key 5).
3. Remove any protective tape or covering from the valve plug/stem assembly.
4. Insert the plug/stem assembly into the seat ring.
5. Install a new bonnet O-ring (key 81) in the groove on the bonnet (see figure 9). Apply a general purpose
silicone-based lubricant.
D For HT constructions, see figure 12. Install a new graphite seal ring (key 107) in the groove on the bonnet. Apply
a general purpose silicone lubricant.
CAUTION
If the packing is to be reused and was not removed from the bonnet, perform the following step carefully to avoid
damaging the packing with the stem threads.
6. Install bonnet, and actuator yoke onto the valve body by completing the assembly according to steps 14 to 27 of
the section Replacing Packing, omitting step 17 if new packing is not being installed.
Bottom Port Common Trim Assembly
1. Once the seal ring (key 37) is removed, the elastomeric backup ring (key 38) can be pried from the groove.
2. To install a new backup ring (key 38) and seal ring (key 37) into the cage (key 2), apply a general purpose
silicone-based lubricant. Slide the backup ring into the cage and into the groove. Slide the seal ring from the top
into the cage over the backup ring.
3. Install a new cage O-ring (key 81) in the outer groove on the cage (see figure 10). Apply a general purpose
silicone-based lubricant.
4. Before installing a new cage, thoroughly clean the threads in the valve body. Apply a suitable lubricant to the
threads and to the radius surface of the cage (key 2). Screw the cage into the valve body. Using the cage tool,
tighten the cage and torque according to the values in table 7. Remove all excess lubricant after tightening.
(36 pagine)
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