Flowserve LPS Pneumatic Heavy-Duty Actuator Series - Manual (Page 13)

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LPS Series Heavy-Duty Actuators FCD LFENIM0001-02-AQ – 5/15
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a WARNING: In case of spool piece (or adapter flange) installation by the client, it is mandatory to refer to Figure 30
“Mounting Interface Dimensions”, or to follow more specific instructions included in the job documentation
supplied along with the actuator. These assembling instructions include details of prescribed stud bolts and their
maximum allowable threaded length, in addition to the Loctite type to be used for a perfect sealing of Scotch yoke
housing.
a CAUTION: The actuator lifting and handling should be made by qualified personnel and in compliance with the
laws and provisions in force.
a WARNING: The lifting lugs or eyebolts are appropriate for actuator lifting only. They are not designed to support
the combined weight of the valve and actuator assembly together. During the lifting operations do not stand under
the actuator. The actuator should be handled with appropriate lifting means. The weight of the actuator is reported
on the packing slip and on the overall-dimensions drawing furnished with the documents accompanying the
actuator.
2.3 Travel-stop Bolts and Accessories
All actuated valves require accurate travel-stop adjustments at both ends of the stroke to obtain optimum performance
and valve seat life. Adjust the travel-stop bolts of the actuator for the proper open and close valve positions, per valve
manufacturer’s recommendations.
The LPS actuators have travel-stop adjustments in both the clockwise and counter-clockwise directions. The
+/- 5-degree adjustment feature provides shaft rotation from 80 to 100 degrees overall.
The adjustment of the travel-stops is performed in accordance with the following steps. Refer to Figures 23, 24, 25 and 26.
Pneumatic cylinder stop (28): Loosen the seal nut (62) with a proper wrench. Pneumatic cylinder stop (25): Loosen the
seal nut (if present) with a proper wrench. Screw or un-screw the stop (25), using a proper Allen key, while keeping the
seal nut stationary. Tighten the seal nut.
Spring container stop (7): Remove the spring container end flange (11) after unscrewing the hex screws (10). Screw
or unscrew the end stop (7) to the desired position, using a proper Allen key. Replace the end flange and tighten the
hex screws.
Pneumatically stroke the actuator several times to assure proper operation. The stem adaptor should not bind during
operation. If the actuator is equipped with a switch, positioner or other accessories, adjust them at this time.
2.4 Grounding System
For the actuator earthing, use the grounding kit, shown in Figures 14, 15 and 16:
Figure 15: Grounding Kit Assembled Figure 14: Grounding Kit Detail