Travel Stop; Bottom Travel Stop (Minimum Travel); Top Travel Stop (Maximum Travel) - Samson 3271 Mounting And Operating Instructions

Start-up

6.2 Travel stop

See Fig. 6-1
In the version with travel stop, the maximum
and minimum actuator travel can be limited
as follows:
Direction of action
Stem extends (FA) 0 to 125 %
Stem retracts (FE)
6.2.1 Bottom travel stop
(minimum travel)
1. Loosen lock nut (A70) and remove cover
(A73).
2. Unscrew lock nut (A74) and turn the ad-
justment nut (A72) to adjust the travel
stop.
3. Tighten lock nut (A74).
4. Attach the cover (A73) and retighten the
lock nut (A70).
6.2.2 Top travel stop
(maximum travel)
1. Loosen the lock nut (A70).
2. Adjust the cover (A73) to the required
travel stop.
3. Retighten lock nut (A70).
6-4
Min. stop Max. stop
50 to 125 %
0 to 100 % 50 to 100 %
Left half: Actuator stem retracts (FE)
Right half: Actuator stem extends (FA)
A1 Top diaphragm case
A5 Diaphragm plate
A7 Actuator stem
A70 Lock nut
A72 Adjustment nut
A73 Cover
A74 Lock nut
Fig. 6-1: Travel stop
A73
A74
A72
A70
A1
A5
A7
EB 8310-4 EN