17
Keeping the World Flowing
9
OPERATION AND USE
9.1
ACTUATOR OPERATING DESCRIPTION
Please refer to the operating diagram supplied for the specific
actuator.
9.2
SETTING THE ACTUATOR ANGULAR STROKE
Warning: Certain valves incorporate their own stops. For such
valves it is recommended that the actuator stop bolt positions
coincide with the valve stop position.
9.2.1 Double-Acting Actuator
9.2.1.1 Setting of the ‘closed valve’ position (see Figure 7)
Adjust the stop bolt as follows:
• Pressurise the actuator from the first side until the
actuator reaches the fully closed position.
• Check where the actuator angular stroke stops. It should
stop right at the fully closed position of the valve.
• To change the stop position:
-
Simply loosen the lock nut
(2)
.
-
Pressurise the actuator from the opposite side
(moving the valve towards the opening position) so
that the vane moves away from the stop bolt
(1)
.
-
If the actuator did not reach the fully closed position,
adjust the stop bolt
(1)
anti-clockwise.
-
If the actuator stopped beyond the fully closed
position, adjust the stop bolt
(1)
clockwise.
-
Verify the newly obtained angular position with one
closing stroke.
-
Repeat this operation until the desired angle is
obtained.
• Hold the stop bolt
(1)
with a wrench and tighten the
lock nut
(2)
. Ensure the washer
(3)
and the under seal is
properly placed.
9.2.1.2 Setting of the ‘open valve’ position (see Figure 7)
Adjust the stop bolt as follows:
• Pressurise the actuator from the second side until the
actuator reaches the fully opened position.
• Check where the actuator angular stroke stops. It should
stop right at the fully opened position of the valve.
• To change the stop position:
- Simply loosen the lock nut
(2)
.
- Pressurise the actuator from the opposite side
(moving the valve towards the closing position) so
that the vane moves away from the stop bolt
(1)
.
- If the actuator did not reach the fully opened position,
adjust the stop bolt
(1)
anti-clockwise.
- If the actuator stopped beyond the fully opened
position, adjust the stop bolt
(1)
clockwise.
- Verify the newly obtained angular position with one
opening stroke.
- Repeat this operation until the desired angle is
obtained.
• Hold the stop bolt
(1)
with a wrench and tighten the lock
nut
(2)
. Ensure the washer
(3)
and the o-ring is properly
placed.
Figure 7: Setting angular stroke.
Operation and Use
1
2
3
