Cashco SCV-S - Manual (Page 6)

IOM-SCV-S 6
with bonnet (2) by checking OD of fl anges.
Finger-tighten clamp nuts (4.3). NOTE: Gap
be tween clamp (4.1) halves should be equal
in size. See Figure 3.
7. Wrench-tighten each clamp nut (4.3) in al-
ter nate one-half rev o lu tion increments. Final
tight en clamp bolting (4.2)(4.3) to a 20 Ft-lbs
(27 N-m) torque value.
8. Reinstall actuator assembly (AA) to body as-
sembly (BA) per Section V.G. or V.H.
G. Mounting - Actuator to Body Std Threaded
Stem:
1. Place body assembly (BA) into a vise securely
with the stem (3, 10) directed upwards.
2. Install jam nuts (17) on stem (3), rotate CW
down to base of threads and secure together
tight.
3. Using an overhead hoist, rig and lift actuator
assembly (AA) above body assembly (BA).
Lower actuator as sem bly (AA) down and over
stem (3), so the upper end of the stem passes
thru lower opening of the yoke (3) and thru
yoke nut (8).
4. Reposition indicating washer (16) or accessory
plate ((AP)) over end of stem.
For ATO-FC Reverse Action Units:
Connect a temporary air supply hose that has
an ad just able airset with gauge to the actuator
and pressurize the actuator to upper limit of the
bench range specifi ed on the name plate (40).
For ATC-FO Direct Action Units:
Not necessary to connect temporary air supply.
5. Continue to lower actuator assembly until
it rest on the bonnet (2). Align actuator as-
sembly (AA) and body assembly (BA) with
matchmarks of V.B.1 pre vi ous. Place yoke
nut (8) onto bonnet threads and hand tighten.
6. With hand, grasp and lift plug/stem (3) up to
connect with ac tu a tor stem (6). Rotate valve
stem CCW (viewed from above) to en gage w/
ac tu a tor stem (6). Use the total number of
revs en gage ment recorded in Step V.B.5. or
Step V.B.6. as the guide to control engagement
of the stems (6) (3.1). NOTE: For ATO-FC
Action may need to slowly decrease actuator
pressure to allow stem and collar to engage.
7. Rotate upper jam nut (17) up underneath
indicating washer (16) or accessory plate
((AP)) and secure tight. Rotate lower jam nut
up underneath upper jam nut - snug.
8. Tighten yoke nut (8) to 85 ft-# (115 N-M).
For ATO-FC (Reverse) Action Units Only: Re-
lease all pressure from the actuator.
H. Mounting - Actuator to Body Opt-68 QDS:
1. Place body into a vise securely with the plug/
stem (10) directed upwards.
2. Using an overhead hoist, rig and lift actuator
assembly (AA) above body assembly (BA).
Lower actuator as sem bly (AA) down and over
valve stem (10), so the upper end of the valve
stem passes thru lower opening of the yoke
(3) and thru yoke nut (8).
For ATO-FC Reverse Action Units:
Connect a temporary air supply hose that has
an ad just able airset with gauge to the actuator
and pressurize the actuator to upper limit of the
bench range specifi ed on the name plate (40).
For ATC-FO Direct Action Units:
Not necessary to connet temporary air supply.
3. Continue to lower actuator assembly until
it rest on the bonnet (2). Align actuator as-
sembly (AA) and body assembly (BA) with
matchmarks of V.B.1 pre vi ous. Place yoke
nut (8) onto bonnet threads and hand tighten.
4. Grasp stem (10) between thumb and forefi n-
ger of one hand. Grasp collar (42b) be tween
thumb and forefi nger of the oth er hand. Lift
stem up and into the opening of the lower col-
lar (42b). Slide/push the collar (42b) upwards
while si mul ta neous ly lifting the plug/stem
end into the quick disconnect (42) as sem bly.
A “click” will be felt when the engagement is
prop er; release the collar (42b). The lower
lips of the collar (42b) and the ac tu a tor stem
(6) assembly should align. Re lease the plug/
stem (10) to en sure en gage ment. NOTE: For
ATO-FC Action may need to slowly decrease
actuator pressure to allow stem and collar to
engage.
5. Tighten yoke nut (8) to 85 ft-# (115 N-M)
For ATO-FC (Reverse) Action Units Only: Re-
lease all pressure from the actuator.