Operation - Emerson Bettis RPX Series Safety Manual

Section 3: Bettis RPX Actuators
October 2020
3.2
3.2.1
6
WARNING
!
Stay away from moving parts to prevent serious injury. When test
cycling the actuator and valve assembly by applying pressure to the
A or B port, be aware that there are moving parts like pinion top,
actuator to valve coupling and the valve stem, ball, plug, etc.
Isolate the piping system on which an actuator-valve assembly
is installed, when removing this assembly, and relieve any media
pressure that may be trapped in the valve cavities before removing
the actuator for maintenance.

Operation

WARNING
!
When rotating the actuator stem or shaft with loading pressure
applied, use caution to keep hands and tools out of the actuator
travel path. Personal injury and property damage is possible if
something is caught between the actuator stem and other control
valve assembly parts.
Operating Media
1. Use clean, dry or lubricated air.
2. Maximum Operating Pressure (MOP) = 8.3 bar/120 psi
(Dynamic)
MOP is the pressure required to produce the maximum rated
torque at the break position for all actuators.
Pressure should not exceed MOP during valve rotation.
MOP should be the maximum pressure regulator setting.
Safety Guide
DOC.SG.BRX.1 Rev. 1
Bettis RPX Actuators