Fisher V500 Rotary Control Valve

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V500 ValveInstruction ManualFebruary 2010For packing other than spring-loaded packings,leakage around the packing follower (key 14) can bestopped by tightening the packing flange nuts(key 16). If leakage cannot be stopped in thismanner, replace the packing according to theReplacing Packing procedure.If the packing is relatively new and tight on the valveshaft (key 3), and if tightening the packing nuts doesnot stop leakage, it is possible that the valve shaft isworn or nicked so that a seal cannot be made. If theleakage comes from the outside diameter of thepacking, it is possible that the leakage is caused bynicks or scratches on the packing box wall. Inspectthe shaft and packing box wall for nicks or scratcheswhen performing the following procedures.Replacing PackingNoteIf the valve has ENVIRO-SEALlive-loaded packing installed, see theseparate ENVIRO-SEAL instructionmanual.This procedure may be performed without removingthe actuator from the valve body if addingPTFE/composition packing rings as a temporarymeasure. However, the actuator must be removed ifreplacing any other kind of packing or if the metalpacking parts (keys 14, 17, and, if used, 18) need tobe replaced.Removing the Packing1. Isolate the control valve from the line pressure,release pressure from both sides of the valve, anddrain the process media from both sides of thevalve. If using a power actuator, also shut off allpressure lines to the power actuator, release allpressure from the actuator. Use lock-out proceduresto be sure that the above measures stay in effectwhile you work on the equipment.CAUTIONWhen the actuator is removed from thevalve, do not use a hammer or similartool to drive the lever or actuator offthe valve shaft. Driving the lever oractuator off the valve shaft coulddamage the valve plug, seal, and valve.If necessary, use a wheel puller toremove the lever or actuator from thevalve shaft. It is okay to tap the wheelpuller screw lightly to loosen the leveror actuator, but hitting the screw withexcessive force could damage thevalve plug, seal, and valve.2. If necessary, remove the cap screws (key 25)and hex nuts (key 26). Then remove the actuatorwhile referring to the actuator manual for assistance.3. Remove the packing nuts (key 16) and packingfollower (key 14).4. Remove the old packing rings (key 13), packingbox ring (key 17), and, if used, the lantern ring(key 18).CAUTIONDo not scratch the valve shaft orpacking box wall. Scratching thesesurfaces could cause leakage.5. Clean all accessible metal parts and surfaces toremove particles that would prevent the packingfrom sealing.6. If necessary, complete the steps in the Replacingthe Valve Plug, Shaft, and Bearings section, andreturn to the Installing Packing steps below.Installing Packing1. Install the new packing rings and packing boxring by stacking the parts as shown in figure 5. Makesure split rings are arranged so that the splits do notline up to form a leak path. Then slide the stack intothe packing box as far as will go while being carefulto avoid trapping air among the rings.2. Install the studs, packing follower, and nuts.CAUTIONTo prevent possible product damageor leakage, make sure the valve plugremains in the closed position wheninstalling new packing parts.3. Make sure the valve plug is in the closed positionwhen installing new packing parts.4. Insert a screw driver, pry bar, or similar toolbetween the lower ear of the plug and the valvebody (see figure 6). Use the pry to move the plugtightly against the thrust washer and bearing on theactuator side of the valve. Keep the valve plug inthat position until you have completed the packinginstallation.5. Tighten packing flange nuts enough to stopleakage under normal conditions.8
Instruction ManualFebruary 2010V500 Valve6. Mount the actuator while referring to the actuatormounting procedures of the actuator instructionmanual. You must complete the Adjusting ActuatorTravel procedure in this manual before installing thevalve in the pipeline, due to the measurements thatmust be made during the actuator adjustmentprocess.7. When the control valve is being put back intooperation, check the packing follower for leakage,and retighten the packing nuts as necessary.Replacing Retainer, Seat Ring, andFace SealsThis procedure is to be performed if the control valveis not shutting off properly, if the port diameter is tobe changed by installing a different seat ring, or ifseat ring inspection is necessary. The actuator andvalve (key 1) must be removed from the pipeline;however, the actuator may remain mounted duringthis procedure.A retainer tool is required to remove the retainer(key 5), seat ring (key 4), and face seals (key 8). Ifspecifically ordered, a tool is supplied with the valve;a tool can also be ordered individually. If desired, atool can be machined using the dimensions shown infigure 7.During assembly, handle the retainer, seat ring, andface seals carefully. Critical areas that must beprotected are the threads and inner surface of theretainer (key 5), the sealing surfaces of the faceseals (key 8), the face seal grooves in the seat ring(key 4), the shutoff surface of the seat ring, and theface seal surface in the valve body (key 1).A new retainer gasket (key 11) is required wheneverthe retainer (key 5) is removed. Other parts in goodcondition can be reused.Disassembly of Retainer, Seat Ring, andFace SealsKey numbers are shown in figures 11 and 13 unlessotherwise noted.1. Isolate the control valve from the line pressure,release pressure from both sides of the valve body,and drain the process media from both sides of thevalve. If using a power actuator, also shut off allpressure lines to the power actuator, release allpressure from the actuator. Use lock-out proceduresto be sure that the above measures stay in effectwhile you work on the equipment.2. Remove line bolting. Then, remove the controlvalve from the pipeline and place the valve on a flatsurface with the retainer (key 5) facing up.3. Rotate the valve shaft (key 3) to move the valveplug (key 2) into the open position.NoteThe retainer (key 5) was installed atthe factory using the torque listed infigure 8.4. Remove the retainer by engaging the retainertool, attaching an impact wrench or other suitabletool, and unscrewing the retainer. Inspect theretainer.CAUTIONPlace the retainer on a protected, flatsurface where the threads and innersurface will not be contaminated ordamaged.5. Remove the retainer gasket (key 11). Inspect thegasket surfaces on the valve body (key 1).6. Lift out the seat ring (key 4) and both face seals(key 8). Inspect the parts and place them on a flat,protected surface.7. Inspect the shutoff surface of the valve plug. If itis worn, nicked, or scratched, proceed to theReplacing Valve Plug, Shaft, and Bearingsprocedure. If the parts are in good shape and do notrequire maintenance, continue to the Assemblyprocedure.Assembly of Retainer, Seat Ring, andFace SealsWARNINGSeat ring installation requires that thevalve plug (key 2) remain in the openposition.To avoid personal injury or damage totools, valve parts, or other itemsresulting from plug closing, preventplug travel by using travel stops,manual actuators, constant supplypressure to a pneumatic actuator, orother steps as appropriate. Wheninstalling the seat ring, keep hands,tools, and other objects out of thevalve.9
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Fisher V500 Rotary Control Valve

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