Flowserve LPS Pneumatic Heavy-Duty Actuator Series - Manual (Page 15)

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LPS Series Heavy-Duty Actuators FCD LFENIM0001-02-AQ – 5/15
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2.6 Fail Open and Fail Close Configuration
The actuator is designed for work in both configurations: fail open and fail close. For conversion from one configuration
to the other, refer to next paragraph.
Figure 17: Single Acting Actuator Configuration: Fail Close – Fail Clockwise
Figure 18: Single Acting Actuator Configuration: Fail Open – Fail Counter Clockwise
Figure 21: Single Acting LPS With Valve Figure 22: Double Acting LPS With Valve
Figure 19: Double Acting Actuator Configuration – Close Position Figure 20: Double Acting Actuator Configuration – Open Position