Samson 3372 - Page 31

EB 8313-3 EN 5-5
Mounting and assembly
b) 350cm² version
Mounting using rods (formC, see Fig.5-3)
1. Remove the clamps of the stem connector
(A12) from the actuator.
2. Unscrew the rod nuts (A54) from the rods
(A33, A51). Leave the plate (A60) at-
tached to the rods.
3. Place the actuator with the rod ends on
the valve bonnet (2).
4. Tighten the rod nuts (A54) in alternating
sequence. Make sure that the rods on the
bottom case do not turn. Observe tight-
ening torques.
5. Fail-safe action "stem extends": position
the stem connector clamps (A12) and
screw them tight. Observe tightening
torques.
Fail-safe action "stem retracts": apply
pressure to the top diaphragm chamber
until the actuator stem touches the plug
stem. Position the stem connector clamps
(A12) and screw them tight. Observe
tightening torques.
A60
A54
2
A33/A51
2 Valve bonnet
A33 Rod
A51 Rod
A54 Rod nut
A60 Plate
Fig.5-3: Mounting using rods (formC), 350cm²