Table of Contents
Advertisement
ES Valve
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.
2. With care, remove the ENVIRO-SEAL
stem/bellows assembly. If necessary, lift out the
cage, also. 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.
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 stem/bellows assembly or a
new plug can be installed.
3. Inspect the existing valve plug. If the plug is in
good condition, it can be reused with the new
stem/bellows assembly.
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.
To avoid damaging parts, 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.
The ENVIRO-SEAL stem/bellows
assembly has a one-piece stem.
4. To remove the existing valve plug from the 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 the pin.
14
Note
Note
5. Then, reverse the plug stem 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 existing plug from the valve
stem.
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 plug to the adaptor. 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. Complete the installation by following steps 7
through 9 and steps 12 through 15 of the
ENVIRO-SEAL Bellows Seal and Bonnet installation
instructions given above.
Purging the ENVIRO-SEAL Bellows Seal
Bonnet
The ENVIRO-SEAL bellows seal bonnet has been
designed so that it can be purged or leak tested.
Refer to figure 8 for an illustration of an
ENVIRO-SEAL bellows seal bonnet, and perform the
following steps for purging or leak testing.
1. Remove the two diametrically opposed pipe plugs
(key 16).
2. Connect a purging fluid to one of the pipe plug
connections.
3. Install appropriate piping or tubing in the other
pipe plug connection to pipe away the purging fluid
or to make a connection to an analyzer for leak
testing.
4. When purging or leak testing has been
completed, remove the piping or tubing and reinstall
the pipe plugs (key 16).
Parts Ordering
Each body-bonnet assembly is assigned a serial
number which can be found on the valve. This same
number also appears on the actuator nameplate
when the valve is shipped from the factory as part of
a control valve assembly. Refer to the serial number
when contacting your Emerson Process
Management sales office for technical assistance.
When ordering replacement parts, refer to the serial
number and to the eleven-character part number for
Instruction Manual
December 2008
Advertisement
Table of Contents
