Installation Instructions

Document No. 129-801
Installation Instructions
June 19, 2015
Page 6 of 7 Siemens Industry, Inc.
Spring Return
Figure 15. SQV91P30U Normally Open Actuator.
Figure 16. SQV91P40U Normally Closed Actuator.
Removing the Actuator from a
Valve
WARNING:
Risk of injury due to fingers being trapped or
pinched. Avoid contact with moving parts.
WARNING:
Risk of hand injury caused by spring under
tension. Do not dismantle the spring.
1. Ensure that the differential pressure across the
valve is zero. See Figure 17.
Figure 17.
WARNING:
Do not disassemble the actuator.
2. Disconnect the electrical power.
3. To engage the manual override crank, pull back
the crank arm until it springs into position.
4. While pushing up on the actuator’s stem
connector, turn the crank arm in the appropriate
direction to disengage the actuator stem
connection from the valve stem.
See Figure 18.
Figure 18.