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T M 1 0 - 3 8 3 5 - 2 1 9 - 1 4
(9)
Remove two screws (14) and separate discs (15 and 16) from disc riser (17).
(10) Remove disc riser (17) from stem (13).
(11) Unscrew stem (13) from bottom of bonnet (1 1).
b.
Cleaning.
l
l
l
(1)
(2)
WARNINGS
Prior to the cleaning of any parts, have an industrial hygienist or
safety personnel review the procedures and personal protective
equipment to be used in the cleaning operation.
Potential health hazards result from inhalation of petroleum solvent
vapors and from contact of solvent with skin. Use rubber gloves and
hand cream for protection, and work with adequate ventilation.
Dry cleaning solvent, used to clean parts, is potentially dangerous to
personnel and property. Avoid repeated and prolonged skin
contact. Do not use near open flame or excessive heat. Flash point
of solvent is 100°F-138°F (38°C-60°C).
Clean all valve components with dry cleaning solvent
Dry components with clean wiping rag.
c.
Inspection.
(1)
Inspect bonnet (11) and valve body (18) for cracks, scored mating surfaces, stripped
threads and corrosion.
(2)
Inspect for bent stem (13) and galled or stripped threads.
(3)
Inspect sealing surfaces of discs (15 and 16) and valve body (18) for deep scratches and
cracks.
(4)
Inspect adapters (6 and 13, figure 6-5) for cracks and damaged sealing surfaces.
d.
R e p l a c e . d a m a g e d o r d e f e c t i v e p a r t s . R e p l a c e a l l s e a l i n g C o m p o n e n t s.
e.
Assembly.
Assemble gate valve. Refer to figure 6-6.
(1)
Screw stem (13) all the way into bottom of bonnet (11), then back out stem three full
turns. Do not allow stem to move from this position.
(2)
While holding stem (13) in place, screw disc riser (17) onto stem until bottom of riser is
flush with end of stem.
(3)
Position discs (15 and 16) on riser (17) and install two screws (14).
Change 1
6-15
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