Doc : Q066 Rev : 10
Issued : 01/11/13 Page : 7 of 25
8.5 Check valve position and repeat steps 2 to 4 until desired valve position is
reached.
8.6 Tighten the protective nut on the applicable end stop screw.
8.7 Repeat steps 8.2 to 8.6 for the remaining end stop screw.
9. Preparations for Start-Up
Pneumatic Connections & Considerations
9.1 Prior to connecting the pneumatic supply line(s), check that all pipes and fittings
are in accordance with the plant specifications.
9.2 Check that all pneumatic supply lines are free of any contaminants or debris, and
that they are suitably supported to minimise any stress caused by vibration.
9.3 Connect the pneumatic supply line fasteners.
9.4 Check fasteners for any leaks, and ensure that they are sufficiently tightened to
avoid the chance of becoming loose due to any vibrations created during
operation.
Electrical Connections & Considerations
NOTE: All electrical connections are the responsibility of the user.
9.5 For installations in hazardous areas, ensure all electrical fittings have the correct
hazardous area certification.
9.6 Ensure that the actuators and any control components are suitably protected
against lightning strikes, electrical surges and spikes; and any magnetic fields.
Actuator Stroking
9.7 Stroke the actuator to check that smooth and continuous operation is achieved.
In the event of uneven stroking, or stroking speeds below those detailed on the
test certificate; first check to ensure correct pneumatic supply pressure and flow
rate. Further fault finding procedures can be found in Section 16.
10. Manual Override Operation
10.1 Double-Acting Actuator with Handwheel Type Manual Override
(See Section 16.6, Dwg. HYX-XXX-HDXXX-00-001-PL)
a. Isolate pneumatic supply, depressurise actuator and control system.
b. Remove tubing and fittings from actuator supply inlets to ensure that both sides of
the piston are free to ‘breathe’ to atmosphere.
c. Move the lever on the handwheel frame mounting flange to the ‘ENGAGED’
position.
d. Rotate the handwheel clockwise to close, or anti-clockwise to open the valve.
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