Form Title:
Document #:
INSTALLATION AND MAINTENANCE MANUAL
MM-CH004
(Form: DEF-006A-1)
Revision:
0
Document Title:
Date:
EXTERNAL CHEMICAL HYDRAULIC VALVE
Oct. 20, 2020
Page:
7 of 10
Betts Industries Inc.
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814·723·1250
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1800 Pennsylvania Ave. West
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Warren, PA 16365
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Print Date: 1/22/2021
This form is considered uncontrolled 24 hrs. after print date.
Hold cap collar stationary while using spanner wrench
(16236MS) to unscrew seal retainer ring (18).
•
If lower stem (14) unscrews from the upper stem (6) it will be
necessary to clamp lower stem (14) in a vice to unscrew seal
retainer ring (18). Care should be taken not to damage the
lower stem (14) by applying too much pressure with the vice.
•
If lower stem (14) remains in valve body after the seal retainer
ring (18) was removed, continue to hold the cap collar (2) and
insert a ¼” thick x 2” wide piece of plate into the slots on the
lower stem (14) and unscrew lower stem (14).
Remove bearing (17) from seal retainer ring (18) and replace
with new from kit.
•
If bearing is not present, inspect seal retainer (18) for counter bore to receive
bearing. If the counter bore is not present, replace seal retainer (18) with the up
to date version, including the bearing (17). See Engineering Bulletin 8-08 for
more detail on the bearing (17).
Using care not to damage the seal surface of the seal retainer ring (18), remove
old main seal (16) and install new main seal (16) into lower stem (14).
CORRECT
INCORRECT