Samson 2780-1, Монтаж и эксплуатация, Страница: 36 / 52

8-6 EB 5840 EN
Servicing and conversion work
13. 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 (A42).
2. Pull the actuator stem (A1) together the
diaphragm plate (A39), diaphragm
(A48), metal plate (A38) and bushing
(A46) out of the bottom diaphragm case
(A40).
3. Completely unscrew the collar nut (A53),
while holding the actuator stem (A1) sta‑
tionary using a suitable tool which can‑
not damage the sealing.
4. Remove the diaphragm plate (A39) to‑
gether with the diaphragm (A48) and
metal plate (A38) from the actuator stem
(A1) and place them back on again
turned over.
5. Tighten the collar nut (A53).
6. Apply a suitable sealant and lubricant to
the actuator stem (A1).
7. Slide the bushing (A46) over the actuator
stem (A1).
8. Place the actuator stem (A1) together
with the ready‑assembled diaphragm
parts into the bottom diaphragm case
(A40).
9. Place the springs (A25) in the bottom di‑
aphragm case (A40), centering them in
the intended recesses.
10. Place on the top diaphragm case (A42).
11. Fasten the top and bottom diaphragm
cases (A42, A40) together with the nuts
and bolts.
12. Screw the vent plug (A20) into the top
signal pressure connection (S
FE
) of the
Type 2780‑1.
The actuator springs, which now push
against the diaphragm plate from above,
cause the actuator stem to extend. The
signal pressure is connected to the bot‑
tom connection (S
FA
) on the bottom dia‑
phragm case. As a result, the actuator
stem retracts opposing the spring force
as the signal pressure increases.
13. Affix a new nameplate with changed
symbol and new configuration ID to the
actuator.
8.6 Ordering spare parts and
operating supplies
Contact your nearest SAMSON subsidiary
or the SAMSON After‑sales Service depart‑
ment for information on spare parts, lubri‑
cants and tools.
Spare parts
See 'Appendix' section for details on spare
parts.
Lubricant
Details on suitable lubricants can be found in
the document
u
AB 0100.
Tools
Details on suitable tools can be found in the
document
u
AB 0100.