Samson 3271 Mounting And Operating Instructions page 47

8. Screw the collar nut (A15) against the
compressor (A35). Observe tightening
torques.
9. Apply a suitable lubricant to the actuator
stem (A7).
10. Clamp the top diaphragm case (A1) with
the opening facing upward into a suit-
able clamping fixture.
11. Place the diaphragm plate assembly to-
gether with the actuator stem (A7) point-
ing upward into the diaphragm case
(A1).
12. Place the springs (A10) in the diaphragm
plate (A5), centering them in the intend-
ed recesses.
13. Carefully guide the bottom diaphragm
case (A2) over the actuator stem (A7)
and place it on the springs (A10). Make
sure that the sealing elements are not
damaged. Ensure that the compressed
air connections on the cases (A1, A2)
are correctly aligned with each other.
14. Fasten the top and bottom diaphragm
cases (A1, A2) together using the nuts
(A21) and bolts (A20). Observe tighten-
ing torques.
15. Unscrew the vent plug (A16) from the top
signal pressure connection and screw it
into the bottom connection (S).
The actuator springs, which now push
against the diaphragm plate from below,
cause the actuator stem to retract. The
signal pressure is connected to the top
connection (S) on the top diaphragm
case. As a result, the actuator stem ex-
EB 8310-2 EN
tends opposing the spring force as the
signal pressure increases.
16. Affix a new nameplate with changed
symbol and new configuration ID to the
actuator.
b) Reversal of the direction of
action from stem retracts to
stem extends
1. Lift off the top diaphragm case (A1).
2. Pull the diaphragm plate assembly out of
the bottom diaphragm case (A2).
3. Loosen the collar nut (A15).
4. Loosen the compressor (A35)
5. Unscrew the actuator stem (A7) out of
the compressor (A35).
6. Unscrew the collar nut (A15) from the
actuator stem (A7).
7. Take the springs (A10) out of the bottom
diaphragm case (A2).
8. Screw the actuator stem (A7) the other
way round into the compressor (A35).
9. Clamp the bottom section of the actuator
stem (A7) into a vise using protective
jaws. Make sure that the actuator stem is
not damaged.
10. Screw the collar nut (A15) with the collar
facing downward completely onto the
actuator stem (A7) and tighten it against
the compressor (A35). Observe tighten-
ing torques.
11. Apply a suitable lubricant to the actuator
stem (A7).
Servicing and conversion
9-9