Instruction Manual
D100399X012
EW Valve
July 2017
28
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 the stem, first, place the existing plug stem
assembly 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 the pin (key 8).
5. Then, reverse the plug stem assembly in the soft‐jaw chuck or vise. Grip the valve stem in an appropriate place and
unscrew the existing plug from the valve stem.
CAUTION
When installing a valve plug on the ENVIRO‐SEAL stem/bellows assembly, the valve stem must not be rotated. Damage to
the bellows may result.
Do not grip the bellows shroud or other parts of the stem/bellows assembly. Grip only the flat areas on the stem where it
extends out of the top of the bellows shroud.
Note
The ENVIRO‐SEAL stem/bellows assembly has a one‐piece stem.
6. To attach the valve plug to the stem of the new ENVIRO‐SEAL stem/bellows assembly, it is necessary to first attach
the plug to the adaptor (key 24, figure 21). Locate the adaptor. Notice that a hole has not been drilled in the threads
where the plug screws onto the adaptor. Secure the valve plug in a soft‐jaw chuck or other type of vise. Do not grip
the plug on any seating surface. Position the plug in the chuck or vise for easy threading of the adaptor. Thread the
adaptor into the valve plug and tighten to the appropriate torque value.
7. Select the proper size of drill bit and drill through the adaptor using the hole in the valve plug as a guide. Remove
any metal chips or burrs and drive in a new pin (key 8) to lock the plug/adaptor assembly together.
8. Attach the plug/adaptor assembly to the ENVIRO‐SEAL stem/bellows assembly by first securing the stem/bellows
assembly in a soft‐jaw chuck or other type of vise so that the jaws of the chuck or vise grip the flats of the stem
extending out of the top of the bellows shroud. Screw the valve plug/adaptor assembly onto the valve stem.
Tighten the plug/adaptor assembly until it is snug. Then turn the plug/adaptor assembly to the next pin hole in the
valve stem. Drive in new pin (key 36, figure 21) to lock the assembly.
9. Inspect the seat ring (key 9). Replace, if necessary.
10. Place a new gasket (key 10) into the valve body in place of the bonnet gasket. Install the new stem/bellows
assembly with valve plug/adaptor by placing it into the valve body on top of the new bellows gasket.
11. Place a new gasket (key 22, figure 21) over the stem/bellows assembly. Place the new ENVIRO‐SEAL bonnet over
the stem/bellows assembly.
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