Flowserve StarPac 3 - Manual (Page 10)

StarPac Intelligent Control System FCD VLENIM0066-05 04/14
10
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1. Look for signs of gasket leakage through the end flanges and bonnet. Re-torque flange and bonnet bolting (if
required).
2. Examine the valve for damage caused by corrosive fumes or process drippings.
3. Clean valve and repaint areas of severe oxidation.
4. Check packing box bolting for proper tightness. Refer to the Installation, Operation and Maintenance (IOM)
instructions for the valve for specific details on maintaining the style of packing supplied.
CAUTION: Do not over-tighten packing. This can cause excessive packing wear and high stem friction that may
impede stem movement.
5. If possible, stroke the valve and check for smooth, full-stroke operation. Unsteady stem movement could
indicate an internal valve problem.
NOTE: Due to excessive friction, graphite packing can cause the plug stem to move in a jerky fashion.
WARNING: Keep hands, hair and clothing away from all moving parts when operating the valve. Failure to do so
can cause serious injury.
6. Make sure positioner linkage and stem clamp are securely fastened. If the stem clamp is loose, check plug
thread engagement (refer to the “Reassembly and Installation” section for the correct procedure on aligning the
plug with the seat). Tighten stem clamp nut.
7. Ensure all accessories, bolting and brackets are securely fastened.
8. If possible, remove air supply and observe actuator for correct fail-safe action.
9. Check rubber actuator bellows for splits, cuts or wear.
10. Spray a soap solution around the actuator cylinder retaining ring and actuator stem guide to check for air leaks
through the O-rings.
11. Clean any dirt and other foreign material from the plug stem.
12. If an air filter is supplied, check and replace cartridge if necessary.
6 Valve Disassembly and Inspection
The StarPac 3 Control Intelligent Control System can be mounted to a variety of different control valves. To disassemble
and inspect the control valve that the StarPac 3 is mounted to, refer to the Installation, Operation and Maintenance (IOM)
instructions for that particular valve (i.e. Mark One, Mark 100, ShearStream or MaxFlo 3). Refer to section 14 of this
manual for instructions on how to remove the pressure sensor cables and thermocouple prior to valve disassembly.
7 StarPac 3 Operation
7.1 Overview
The StarPac 3 is double-acting, capable of supplying air to either side of the actuator piston while exhausting
the other side to the atmosphere. Also, the positioner can be mounted on either Flowserve Valtek linear or rotary
actuators without modification to the actuator.
Since the positioner is insensitive to supply pressure changes and can handle supply pressures from 30 to 150
psig, a supply regulator is usually not required; however, an air filter is required due to the close tolerances of the
spool assembly.
STOP!