Samson 3372 Mounting and operating instructions - 4.1.2 Mounting Using Rods
18
EB 8313-3 EN
Mounting on the valve
4.1.2 Mounting using rods
See Table 1 on page 10 for Form C
The Type 3372 Actuator (120 cm²) is suit-
ableformountingonType 3321Valvesin
DN 65to100with15 mmtravel.
Therodendsarefittedwithadapterbush-
ings (33.1) to provide a threaded attach-
ment. Additionally, a plate (60) ensures the
correct distance between the rods.
Î
Place the rods (33) in the corresponding
holes on the valve bonnet (34).
Î
Holdthehexagonalpartoftherodssta-
tionary using an open-end wrench
(widthacrossflats22)andfasteneach
rod with a hex nut. During which, the ac-
tuator stem is pressed down approx. 1 to
2 mm.
Î
Place the stem connector clamp with trav-
el linkage behind the actuator stem and
fasten the other clamp onto it using two
screws.
At the same time, align the follower
clamp for the follower pin of the posi-
tioner parallel to the support element
(61).
WARNING!
For actuators with fail-safe action
„actuator stem retracts“ (FE), air must
be applied to the top diaphragm
chamber until the actuator stem
touches the plug stem.
Risk of crushing! Do not touch the
yoke.
The stem connector clamps can then
be mounted.
4.2 Type 3372 (350 cm²) –
mounting using rods
See Table 1 on page 10 for Form C
Fig. 5
The actuator with 350 cm² diaphragm area
is designed for Types 3321 and 3323 Valves
inDN 65to100with15or30 mmtravel.
Î
Before mounting, unscrew the hex nuts
(54) from the rods. The plate (60) re-
mains attached to the rods.
Î
Place the actuators with the rod ends on-
to the valve bonnet (34). Tighten the two
hex nuts (54) alternately, while holding
the rods stationary at the hexagonal part
with a open-end wrench (width across
flats22)topreventtherodsfromturning
in the bottom diaphragm case.
WARNING!
For actuators with fail-safe action
„actuator stem retracts“ (FE), air must
be applied to the actuator until the
actuator stem touches the plug stem.
Risk of crushing! Do not touch the
yoke.
Î
Mount the stem connector clamps be-
tween the actuator stem and the plug
stem, while aligning the follower clamp
for the follower pin of the positioner par-
allel to the support element.