Installation, Operation and Maintenance Manual
VCIOM-15345-EN Rev. 1
February 2022
11
Installation
Section 2: Installation
2.6
Setting the Stroke Limit Stops
2.6.1
The Biffi OLGA-H/OLGAS-H and RPHD/RPHS Actuator is provided with bidirectional
travel stops allowing 80° to 100° total travel (+/- 5° adjustment at each end of the
90° stroke).
2.6.2
Actuators are shipped from the factory with the travel stops adjusted for
approximately 90° rotation. Generally, it is necessary to make slight travel
stop adjustments once the actuator is installed on the valve. Refer to the valve
manufacturer's recommendations for specific requirements.
2.6.3
When the valve has internal stops, the actuator stops must be set so that the load
is applied to them, not the valve stops.
2.6.4
If adjustment is required, use the handpump to move the actuator off the
stop at the Fail-Safe Position before attempting to turn the adjusting screw
(refer to Section 4.4, Handpump Operation).
!
CAUTION
Do not adjust actuator’s stop at the Fail-Safe Position, with the spring force against the
stop. Always use the handpump to move the actuator off the stop before attempting to
turn the adjusting screw.
2.6.5
With the Fail-Safe Position stop set, use the handpump to move the actuator to
the other end of the stroke and check the stop position. If adjustment is required,
slowly open Manual Bypass Valve (Lockable) (19) just enough to allow the actuator
to spring-return off the stop before adjusting.
