Flowserve Mechanical and Hydraulic - Manual (Page 17)

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Mechanical and Hydraulic Overrides FCD LFENIM0004-00-AQ – 05/15
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3.1.1 Installation - Travel-Stop Bolts Adjustment Hydraulic Hand Pump Override
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 Hydraulic Hand Pump manual override (-HP) has travel-stop adjustment in one direction: valve open direction (in LPS/LHS single-
acting fail open and in LPS double acting) or valve close direction (in LPS/LHS single-acting fail close and LHS double acting). The
travel stop adjustment in the opposite direction must be performed in according with the IOM of the actuator.
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:
3.1.1.1 Loosen the seal nut with a proper wrench (Figure 10).
3.1.1.2 While keeping the seal nut stationary, screw or un-screw the travel-stop (Figure 10) bolt using a proper Allen key.
3.1.1.3 Tighten the seal nut.
3.1.1.4 Stroke the actuator several times to assure proper operation. The stem adaptor should not bind during operation. If the
actuator is equipped with limit switches, positioners or other accessories, adjust them at this time.
3.1.2 Operation – Hydraulic Hand Pump Override Installed on LPS Single-Acting Actuator
Figure 11 – Hydraulic Hand Pump Manual Override Installed on Single-Acting Actuator
3.1.2.1 Manual Operation
a CAUTION: prior to operating the actuator by mean of manual overrides, be sure to remove the pressure inside the cylinder and
that the cylinder has been vented to atmosphere through the venting ports. Ensure that all vent valves are in vent position. The
number of these valves varies as per the actuator and control schematic types.
To manually operate the override:
3.1.2.1.1 Remove the supply pressure inside the actuator’s pneumatic cylinder and vent the cylinder ports.
3.1.2.1.2 Referring to the schematic diagram (Figure 12), switch the manual stop valve SV1 in “MANUAL” position, as shown in the
nameplate located close to the manual isolation valve (Figure 13).