MSI LT VALVE TECHNICAL MANUAL
Revision D
April 03, 2014
31
3.3 ASSEMBLY PROCEDURE – SPLIT INSERT TYPE (TEXT)
NOTE: It is imperative that the workstation being used to assemble the
valve be clean and free of anything that could possibly contaminate the
grease such as metal shavings, dirt, rust, old paint, etc. Do not sand or
deburr near the workstation.
1.
Check surfaces around the valve bore inside the valve pocket for sharp edges
that could cause cutting of the insert o-rings. Then screw the clean
adjusting nut (14)
all the way into the valve body to make sure the threads
are not damaged.
2.
After inspection, remove the
adjusting nut (14)
, grease the sealing groove
and install the adjusting nut
o ring (13)
in the groove.
3.
Check the
roll pins (15 & 16)
in the valve body by gently sliding a set of
insert (12)
into the valve. The
inserts (12)
should move freely up and
down the length of the roll pin slots without interference.
4.
Apply a thin film of lubricant to the recess in the
valve body (8)
and install
the
plug seal (9)
with the metal back towards the recess facing away from
the pressure.
5.
Apply a thin film of lubricant to the recess in the
adjusting nut (14)
and
install the
plug seal (9)
with the metal back towards the recess facing away
from the pressure.
6.
Check the
plug (10)
outside diameter for surface defects such as scratches,
dings, nicks, or sharp edges that could affect the sealing area. See
7.
Apply grease to the
plug seal (9)
in the
adjusting nut (14)
.
8.
Install the lower end of the
plug (10)
(opposite the hex/keyway) in the
adjusting nut (14)
and push down until the plug shoulders on the adjusting
nut.
NOTE: For the 0.38” and 1” valves, do not push the plug (10) all
the way down yet.
9.
Apply a thin film of grease to the entire O.D. of the
plug (10)
.
10.
Check the surface finish of the
inserts (12)
making sure they do not have
any scratches, dings, nicks or sharp edges that could affect the sealing area.
See
11.
Inspect the
insert o-rings (11)
for any possible non-conformity.
12.
Place the
inserts (12)
around the
plug (10)
.
NOTE: For the 0.38” and 1”
valves, push the plug (10) all the way down now.
13.
Install the
insert o-rings (11)
into the
insert (12)
grooves and coat with
grease.
