Flowserve StarPac 3 - Manual (Page 9)

9
StarPac Intelligent Control System FCD VLENIM0066-05 04/14
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CAUTION: On valves equipped with air filters, the air filter must point down to perform properly.
NOTE: In some rare cases, the air supply must be limited to less than 150 psi (10.3 bar). This is indicated on a
sticker found near the upper air port on the actuator cylinder. An air regulator should be installed to ensure the
supply pressure does not exceed the line pressure indicated on the sticker.
1. Pipelines must be correctly aligned to ensure that the valve is not fitted under tension.
2. Fire protection must be provided by the user.
3. Before installing the valve, clean the line of dirt, welding chips, scale and other foreign material.
4. Whenever possible, the valve should be installed in an upright position. Vertical installation permits easier
valve maintenance.
5. Be sure to provide proper overhead clearance for the actuator to allow for disassembly of the plug from the
valve body. Refer to the appropriate actuator User Instructions for proper clearances. Actuator User Instructions
are available at www.flowserve.com.
6. Double-check flow direction to be sure the valve is installed correctly. Flow direction is indicated by the arrow
attached to the body.
7. If welding the valve into the line, use extreme care to avoid excess heat build up in the valve.
8. Connect the air supply and instrument signal lines.
4 Quick-check
Prior to start-up, check the control valve by following these steps:
1. Stroke the valve and observe the plug position indicator on the stem clamp compared to the stroke indicator
plate. The plug should change position in a smooth, linear fashion.
NOTE: Due to excessive friction, graphite packing can cause the plug stem to move in a jerky fashion.
2. Check for full stroke by making appropriate instrument signal changes.
3. Check all air connections for leaks.
4. Check packing box bolting for the correct adjustment. Refer to the packing installation manual 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 plug movement.
5. Make sure the valve fails in the correct direction in case of air failure. This is done by turning off the air supply
and observing the failure direction.
6. After a temperature excursion has occurred, bonnet flange bolting should be re-torqued to ensure bonnet
seals do not leak.
5 Valve Maintenance
At least once every six months, check for proper operation by following the preventative maintenance steps outlined
below. These steps can be performed while the valve is in-line and, in some cases, without interrupting service. If an
internal problem is suspected, refer to the Valve Disassembly and Inspection in the Installation, Operation and Mainte-
nance (IOM) instructions of the valve that the StarPac 3 system is mounted to.