Instruction Manual

Instruction Manual

D100398X012

ET Valve

October 2014

D Disassemble the outer plug from the inner plug and install the seal over the inner plug, so that the seal rests below

the threaded area.

D Thread the outer plug onto the inner plug and tighten with a strap wrench or similar tool until the alignment marks

line up. This will ensure that the plug parts are metal to metal and the seal is compressed properly. Do not damage

the outer plug guide surfaces.

D Install set screws centering the inner plug in the outer plug and torque to 11 NSm(8lbfSft).

D Assemble the piston ring, anti-extrusion rings, backup ring, and retainer.

6. For all constructions, place the gaskets (keys 12, 11 or 14 if used, and 10) and the shim (key 51) on top of the cage

or cage retainer. If there is a cage adaptor (key 4) or a bonnet spacer (key 32), set it on the cage or cage retainer

gaskets and place another flat sheet gasket (key 10) on top of the adaptor or spacer. If there is only a cage retainer,

place another flat sheet gasket on the retainer.

7. With an NPS 8 ET valve, install the load ring (key 26).

8. Mount the bonnet on the valve body and complete assembly according to steps 10 through 14 of the Replacing

Packingprocedure.Besuretoobservethenotepriortostep10.

ENVIRO-SEAL Bellows Seal Bonnet

Replacing a Plain or Extension Bonnet with an ENVIRO-SEAL Bellows Seal Bonnet

(Stem/Bellows Assembly)

1. Remove the actuator and bonnet according to steps 1 through 5 of the Replacing Packing procedure in the

Maintenance section.

2. With care, remove the valve plug and stem assembly from the valve body. If necessary, also lift out the cage.

CAUTION

To prevent possible product damage, cover the opening in the valve in the following procedure to protect the sealing

surfaces and to prevent foreign material from getting into the valve body cavity.

3. Remove and discard the existing bonnet gasket. Cover the valve body opening to protect sealing surfaces and to

prevent foreign material from entering the valve body cavity.

Note

The ENVIRO-SEAL stem/bellows assembly for easy-e valves is available only with a threaded and drilled plug/adaptor/stem

connection. The existing valve plug can be reused with the new s tem/bellows assembly or a new plug can be installed.

4. Inspect the existing valve plug. If the plug is in good condition, it can be reused with the new ENVIRO-SEAL

stem/bellows assembly. To remove the existing valve plug from t he stem, first, place the existing plug stem

assembly and valve plug in a soft-jaw chuck or other type of vise so that the jaws grip a portion of the valve plug that

is not a seating surface. Drive out or drill out t he pin (key 8).

5. Reversetheplugstemassemblyinthesoft-jawchuckorvise.Gripthevalvesteminanappropriateplaceand

unscrew the existing plug from the valve stem.