Spring-Return Actuators - Emerson Bettis RPE-Series Installation, Operation And Maintenance Manual

Installation, Operation and Maintenance Manual
DOC.IOM.BE.EN Rev. 12
4.3.4

Spring-Return Actuators

The operating principle, as explained here, is applicable for actuators with assembly code
CW (direct acting).
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Figure 6
Outward Stoke
Inward Stroke
Installation
Applying supply pressure to port A will move the pistons outwards to the "Open"
position of the valve.
Venting the supply pressure from port A will cause the springs to move the pistons
inwards to the "Close" position of the valve.
For assembly codes CC, the operating principle is reversed (reverse acting).
Stroke Movements
A A A A A A A A A A A
Section 4: Installation
October 2021
A B
A
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