ES Valve
Instruction Manual
December 2008
13
ENVIRO-SEAL stem/bellows assembly. 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 (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.
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.
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). 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 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
as necessary to align the pin hole in the stem with
one of the holes in the adaptor. Secure the adaptor to
the stem with a new pin.
9. Inspect the seat ring (key 9) and soft seat parts
(keys 21, 22, and 23). 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) over the
stem/bellows assembly. Place the new
ENVIRO-SEAL bonnet over the stem/bellows
assembly.
12. Properly lubricate the bonnet stud bolts. Install
and tighten the bonnet hex nuts to the proper torque.
13. Install new packing and the metal packing box
parts according to the appropriate arrangement in
figure 3.
14. Install the packing flange. Properly lubricate the
packing flange stud bolts and the faces of the
packing flange nuts.
For ENVIRO-SEAL or HIGH-SEAL live-loaded
packing,
refer to the note at the beginning of the
Maintenance section.
For graphite packing,
tighten the packing flange
nuts to the maximum recommended torque shown in
table 7. Then, loosen the packing flange nuts, and
retighten them to the recommended minimum torque
shown in table 7.
For other packing types,
tighten the packing flange
nuts alternately in small equal increments until one
of the nuts reaches the minimum recommended
torque shown in table 7. Then, tighten the remaining
flange nuts until the packing flange is level and at a
90-degree angle to the valve stem.
15. Install travel indicator parts, stem locknuts, and
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
(Stem/Bellows Assembly)
1. Remove the actuator and bonnet according to
steps 1 through 6 of the Replacing Packing
procedure of the Maintenance section.
