As with any mechanical equipment, periodic inspection and maintenance is required. For more information about fastener materials, contact your Flowserve representative.
NOTE: indicates and provides additional technical information, which may not be very obvious even to qualified personnel. Compliance with other, not particularly emphasized notes, with regard to transport, assembly, operation and maintenance and with regard to technical documentation e. While unpacking the valve, check the packing list against materials received. Lists describing valve and accessories are in each shipping container. Take care to position lifting straps to avoid damage to the tubing and mounted accessories.
Failure to do so can cause serious injury to personnel, damage to the valve or nearby equipment. Contact your shipper immediately if there is shipping damage. Should any problem arise, call your Flowserve representative. Qualified staff is defined as personnel who are familiar with the installation, commissioning and operation of this product and possess the relevant qualifications in their field of activity. Before installing the valve, clean the line of dirt, welding chips, scale or other foreign material.
Whenever possible, the valve should be installed in an upright position. Vertical installation permits easier valve maintenance. When vertical installation is not possible contact your Flowserve representative.
Be sure to provide proper overhead clearance for the actuator to allow for disassembly of the plug from the valve body. Refer to Table 1 for the necessary clearance needed for valve disassembly. Double-check flow direction to be sure the valve is installed correctly. Flow direction is indicated by the arrow attached to the body. If welding the valve into the line, use extreme care to avoid excess heat buildup in the valve. Connect the air supply and instrument signal lines.
Throttling control valves are equipped with a valve positioner. Refer to the appropriate. NOTE: In some cases, the air supply must be limited to less than psi This is indicated on a sticker or type plate 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. 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. Check for full stroke by making appropriate instrument signal change. Check all air connections for leaks.
Check packing box bolting for the correct adjustment. Refer to the packing installation manual for specific details on maintaining the style of packing supplied.
This can cause excessive packing wear and high stem friction that may impede plug movement. 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.
After a temperature excursion has occurred, bonnet flange bolting should be retorqued to ensure bonnet gaskets do not leak. See Table 2. At least once every six months, check for proper operation by following the preventative maintenance steps outlined below. These steps can be. Look for signs of gasket leakage through the end flanges and bonnet. Retorque flange and bonnet bolting if required. Check for fluid leakage to the atmosphere through the body drain plug, if applicable.
Examine the valve for damage caused by corrosive fumes or process drippings. Clean valve and repaint areas of severe oxidation. Check packing box bolting for proper tightness. This can cause excessive packing wear and high stem friction that may impede stem movement. If the valve is supplied with a lubricator fitting, check lubricant supply and add lubricant if necessary.
Separate installation, operation and maintenance instructions cover 25 and 50 sizes as well as additional features such as handwheels, limit stops, fail-safe systems or limit switches. Product users and maintenance personnel should thoroughly review this bulletin prior to installing, operating or disassembling the actuator.
This publication does not contain information on Flowserve positioners. Refer to the appropriate installation operation and maintenance instructions for installing, maintaining, troubleshooting, calibrating and operating Flowserve positioners. Modifying this product, substituting non-factory or inferior parts or using maintenance procedures other than outlined could drastically affect performance, void product warranties and be hazardous to personnel and equipment.
Specifically, personal protection and lifting devices must be used as warranted. While unpacking the actuator, check packing list against materials received. Lists describing the actuator and accessories are included in each shipping container. Position the lifting straps and hoist to avoid damage to the tubing and mounted accessories when lifting the actuator from the shipping container.
WARNING: When lifting an actuator with lifting straps through the yoke legs, be aware the center of gravity may be above the lifting point. Therefore, support must be given to prevent the actuator from rotating or causing serious injury to personnel or damage to nearby equipment. Contact your shipper immediately in the event of shipping damage. Contact your Flowserve representative with any problems. Prior to installation, make sure adequate overhead clearance for the actuator is provided to allow for proper removal from the valve body and for proper maintenance.
Refer to Table I. NOTE: If an actuator is attached to a valve body assembly, see the appropriate installation, operation, maintenance instructions. Connect the air supply and instrument signal air lines to the two marked connections on the positioner.
Since both the cylinder and positioner are suitable for psi NOTE: In some cases, air supply must be limited to psi 6. Installation of an air filter on the supply line is recommended. Use a soap solution to make sure all air connections are leak-free. At least once every six months, check for proper operation by following the preventative maintenance steps outlined below. These steps should not be performed while the actuator is in service.
If an internal problem is suspected with the actuator, refer to the Disassembly and Reassembly section. When disconnecting air supply, observe actuator for correct fail-safe action. Examine the actuator for damage caused by corrosive fumes and process drippings.
Clean the actuator and repaint any areas of severe oxidation. If possible, stroke the actuator and check for smooth, full-stroke operation. Make sure positioner mounting bolts, linkage and stem clamp are fastened securely. Ensure all accessories, brackets and associated bolting are fastened securely. Check rubber bellows for wear. Spray soap solution around the base and top of the cylinder, the adjusting screw and the lower actuator stem bushing to check for air leaks through the O-rings and gasket.
Clean any dirt or foreign material from the actuator stem. If an air filter is supplied, isolate the air filter, then check and replace cartridge as necessary. Shut off air supply. If actuator is installed on a Flowserve valve, remove the valve per the appropriate installation operation, maintenance instructions. Disconnect all tubing. Remove stem clamp and stem bellows from the actuator stem. Relieve spring compression by completely removing the adjusting screw.
Remove adjusting screw gasket from adjusting screw. The cylinder end cap may fly off the yoke when removing the cylinder tie-rod nuts.
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