3.
With mechanical position indication:
→
Observe direction of rotation.
➥
The direction of rotation is correct if the actuator moves in direction
CLOSE and:
-
For position indication with symbols OPEN/CLOSED = indicator disc turns
counterclockwise.
Figure 24: Position indication with symbols OPEN/CLOSED
4.
Without mechanical position indication:
4.1 Unscrew threaded plug [1] and seal [2] or protective cap for stem protection
tube [4] and observe direction of rotation at hollow shaft [3] or stem [5].
➥
The direction of rotation is correct if the actuator moves in direction
CLOSE in clockwise direction, or the stem moves downward.
Figure 25: Hollow shaft/stem movement for clockwise closing
[1]
Threaded plug
[2]
Seal
[3]
Hollow shaft
[4]
Protective cap for stem protection tube
[5]
Stem protection tube
[6]
Stem
4.2 Correctly fit/screw on threaded plug [1] and seal [2] or protective cap for
stem protection tube [4], fasten thread.
9.4.2.
Limit switching: check
1.
Manually operate actuator into both valve end positions.
➥
The limit switching is set correctly if:
-
LSC switch trips in end position CLOSED
-
LSO switch trips in end position OPEN
-
the switches release the contacts after turning back the handwheel
2.
If the end position setting is incorrect: Reset limit switching.
31
SAI 07.2 – SAI 16.2 / SARI 07.2 – SARI 16.2
for use in nuclear power plants
Commissioning (basic settings)
