Instruction Manual
D100399X012
EW Valve
July 2017
31
15. Install the travel indicator parts and stem locknuts; mount the actuator on the valve body according to the
procedure in the appropriate actuator instruction manual.
Replacement of an Installed ENVIRO‐SEAL Bellows Seal Bonnet (Stem/Bellows Assembly)
1. Remove the actuator and bonnet according to steps 1 through 6 of the Replacing Packing procedure of the
Maintenance section.
2. Lift out the cage. Remove and discard the existing bonnet gasket and bellows gasket. Cover the valve body opening
to protect sealing surfaces and to prevent foreign material from entering the valve body cavity.
CAUTION
The ENVIRO‐SEAL stem/bellows assembly for easy-e valves is available only with a threaded and pinned plug/adaptor/stem
connection. The existing valve plug can be reused with the new stem/bellows assembly or a new plug can be installed. If
the existing valve plug is reused, and the adaptor is in good condition, it may be reused also. However, never reuse an old
adaptor with a new valve plug. Using an old adaptor with a new valve plug requires drilling a new pin hole in the adaptor.
This drilling weakens the adaptor and may cause failure in service. However, a used valve plug may be reused with a new
adaptor.
3. Inspect the existing valve plug and adaptor. If they are in good condition, they can be reused with the new
stem/bellows assembly and they do not need to be separated.
CAUTION
When removing/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.
4. If the valve plug and adaptor are not in good condition and must be replaced, the valve plug/adaptor assembly
must first be removed from the stem/bellows assembly and then the valve plug removed from the adaptor. First,
place the stem/bellows 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 the pin (key 8). Drive out the pin (key 36,
figure 21).
5. Then, reverse the stem/bellows and plug/adaptor assembly in the soft‐jaw chuck or vise. Grip the flat areas on the
valve stem just below the threads for the actuator/stem connection. Unscrew the plug/adaptor assembly from the
stem/bellows assembly. Unscrew the valve plug from the adaptor.
6. To attach either the existing or a new valve plug to the stem of the new ENVIRO‐SEAL stem/bellows assembly, first
attach the plug to the adaptor (if the valve plug was removed from the adaptor) as follows:
D Locate the adaptor. Notice that a hole has not been drilled in the new adaptor threads where the plug screws onto
the adaptor.
D 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.
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