Fisher EZ easy-e Instruction Manual page 23

Instruction Manual
D100401X012
2. Using care, remove the valve plug and stem assembly, and, if necessary, the seat ring retainer and bushing
assembly from the valve body. Remove and discard the existing bonnet gasket (key 10, figure 12) and gasket (key
22, figure 11). 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 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, to avoid weakening
the adaptor that may cause failure in service, never reuse an old adaptor with a new valve plug. Using an old adaptor with a
new plug requires drilling a new pin hole in the adaptor, which will weaken the adaptor. 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 existing valve plug and adaptor are not in good condition and must be replaced, first, place the existing
stem/bellows assembly and valve plug and adaptor 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 pin (key 8, figure 12). Drive
out pin (key 36, figure 11).
5. Use a wrench on the flat areas on the valve stem just below the threads for the actuator/stem connection in a
soft‐jaw chuck or vice to keep the stem from turning. Then, unscrew the valve plug from the adaptor and the
adaptor from the stem/bellows assembly.
6. To attach either the existing valve plug or a new one to the stem of the new ENVIRO‐SEAL stem/bellows assembly, it
is necessary to first attach the valve plug to the adaptor (key 24, figure 11), if the valve plug was removed from the
adaptor. Locate the adaptor. Notice that a hole has not been drilled in the new adaptor threads where the valve plug
screws onto the adaptor.
If installing either a new valve plug and/or a new 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 torque values given in figure 10.
7. Complete the installation by following steps 7 through 16 of the Replacing a Plain or Extension Bonnet with an
ENVIRO‐SEAL Bellows Seal and Bonnet procedure provided in the previous section.
EZ Valve
November 2017
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