Assembly
1. Make sure the bonnet O‐ring (key 8) is on the bonnet and lubricated with lithium grease (key 49).
2. Install the plug (key 2) on the stem (key 47) and insert a new groove pin (key 4).
3. Thoroughly clean the seat ring and bonnet threads in the valve body (key 1). Also clean the valve body seat ring
gasket surfaces.
4. Apply anti‐seize lubricant (key 54) to the threads of the seat ring (key 3), and its mating threads in the valve body.
5. Apply anti‐seize lubricant (key 54) to the seat ring gasket (key 9) and install into the valve body.
6. Screw the seat ring into the valve body. Use a socket wrench to tighten the seat ring to the torque values shown in
table 8. Remove all excess lubricant after tightening.
7. Lubricate (key 54) the threads on the valve body and hammer nut and the contact surfaces of the bonnet and
hammer nut flange. Install the bonnet and actuator assembly with pinned valve plug onto the valve body. Tighten
the hammer nut using an adjustable wrench until the nut stops turning. A few hammer blows will be required to
ensure that the assembly is tight.
8. See the actuator assembly and spring adjustment sections of this manual.