Edward Forged Steel Valve User Instructions (IOM)
Contents
1. valve has been disassembled and thoroughly cleaned determine the best procedure based on the extent of damage Lightly damaged seats may simply be repaired by lapping with the valve disk assembly Heavier damage may require the use of special lapping tools or removal hi of the valve body from the line for remachining These valves should INI then be finish lapped using the valve disk assembly see sketch on page 5 Seat refinishing tools are also available for integral Stellite seat Bed Bonnet Ceneiucion valves Consult your local Flowserve representative Complete instructions for the repair and finishing of integral Stellite Seats and Seat Fi nish ng valve seats are contained in Univalve Operation and Maintenance Manual FCD EVENIM2000 Bulletin V 370 Seats Flowserve Edward valve seats are of two types screwed in with O Ring Seal or integral with the valve body NOTE Refer to Appendix for list of Seat Refinishing Tools Seat Finishing After properly installing seats in valve bodies or reworking integral seat valves the seat and disk should be lapped together To preclude galling caution should be taken not to apply too much pressure in lapping seats and disks Lapping should be done with a light load lifting the disk frequently to a new position and cleaning the lapping faces as required See sketch on page 5 Screwed in seats can best be repaired if more than lightly damaged by removal from the valv2. FCD EVENIM2001 04 AQ 10 15 Appendix seat Refinishing Tools 848 Valves Tool Head Assembly Replacement Cutters ane pati 0 5 876111 169077 Not Repl 3 0 75 876112 169078 Not Repl 3 1 876113 169079 876703 3 1 1 876115 169080 876703 5 2 876115 169081 876703 5 1048 Valves Replacement Cutters ee eat 0 5 None Available None Available N A N A 0 75 876111 169078 Not Repl 3 1 876112 169082 Not Repl 3 1 1 876114 169083 876703 5 2 876115 169084 876703 5 Complete instructions for the repair and finishing of integral Stellite valve seats using the above seat refinishing tools are contained in Service Manual for Edward Univalves FCD EVENIM2000 Bulletin V 370 Seat Refinishing Tool Assembly Guide Bushing Tool Head Assembly Includes Cutters W Replacement Cutters flowserve com Ka N FLOWSERVE wee Flowserve Flow Control Division Edward Valves 1900 South Saunders Street Raleigh NC 27603 USA FCD EVENIM2001 04 AQ 10 15 Printed in USA Replaces V 376 R2 To find your local Flowserve representative or for more information about Flowserve Corporation visit www flowserve com Flowserve Corporation has established industry leadership in the design and manufacture of its products When properly selected this Flowserve product is designed to perform its intended function safely during its useful life However t
3. Flowserve Corporation Irving Texas USA Flowserve is a registered trademark of Flowserve Corporation flowserve com
4. If extreme service conditions dictate a more frequent relube schedule is recommended Motor actuated valves have a lubricant fitting at the yoke flange The recommended lubricant for all stem threads bonnet packing nut and bolt threads is Rykon EP 2 manufactured by the American Oil Company This is an extreme pressure extreme temperature lubricant of high quality For valves that are operated infrequently relubrication should be at least once a year Ca N FLOWSERVE N General Information amp WARNING Flowserve Edward valves are not provided with a pressure relief device A pressure relief device must be provided elsewhere in the piping system to prevent the piping system pressure from exceeding the maximum rated pressure of the valve Piping Support Piping should be supported sufficiently to preclude excessive end loads on the valve VALVE INSTALLATION GUIDELINES Except as noted below Flowserve Edward stop valves and stop check or check valves with springs can be installed in any position Installed positions with the valve cover or bonnet below horizontal where dirt and scale can accumulate in the valve neck should be avoided For optimum performance the orientation limits shown in Figures 1 and 2 should be observed even for spring loaded check valves The orientation limits shown in Figures 1 and 2 must not be exceeded for Flowserve Edward stop check valves and check valves without springs The limitations given fo
5. cover see Figure 160 The wear on sliding sur faces inside valves should be considered and the surfaces checked to be sure wear has not resulted in ridges in the guide bore which might impair disk movement Guiding in check valves is particularly critical The guides must be close enough to bring the disk accurately down into the seat to make a tight joint Figure 160 Screwed Cover Cover guided Ball Check Screwed in Set Foreign material in the flow medium may wedge between guiding sur faces with the possibility of making the disk stick It is recommended that piston check valves be used where the fluids are clean and where tight seating is important In smaller sizes it is recommended that ball type check valves be used where the problem of sticking open is of serious consideration Valves sized too large for flow condition will sometimes have excessive wear chatter and noise Backseat and Packings Backseat Flowserve Edward stop valves have a backseat integral with the bonnet The seating face on the bonnet is generally a bevel and the seating surface on the disk disk nut or stem is provided with either a radius or a bevel Care must be taken of sealing surfaces on both the bonnet and the radius which seals against it to obtain a tight backseat Maintenance Manual Edward Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 Integral Backseat Construction Packings Flowserve Edward valves are packed with all purpose packi
6. products might be used in numerous applications under a wide variety of industrial service conditions Although Flowserve can and often does provide general guide lines it cannot provide specific data and warnings for all possible applications The purchaser user must therefore assume the ultimate responsibility for the proper sizing and selection installation operation and maintenance of Flowserve products The purchaser user should read and understand the Installation Operation Main tenance IOM instructions included with the product and train its employees and contractors in the safe use of Flowserve products in connection with the specific application While the information and specifications contained in this literature are believed to be accurate they are supplied for informative pur poses only and should not be considered certified or as a guarantee of satisfactory results by reliance thereon Nothing contained herein is to be construed as a warranty or guarantee express or implied regarding any matter with respect to this product Because Flowserve is continually improving and upgrading its product design the speci fications dimensions and information contained herein are subject to change without notice Should any question arise concerning these provisions the purchaser user should contact Flowserve Corporation at any one of its worldwide operations or offices i FLOWSERVE Maintenance Manual Edward Forged Steel Valves
7. to close Disks the valve tightly In a leaking valve this contact should be checked if possible to be sure it is in proper condition In all Flowserve Edward valves disks are designed to swivel on the valve stem They are held in place by either a T slot connection a disk Disk Tack Welds nut or Stellite wire In body guided valve disks with disk nuts the disk nut is secured to the disk by a small weld through the side of the disk fusing the disk nut threads and preventing loosening of the disk assembly in service Such disks can easily be disassembled if required by drilling out the fused material at the bottom of the small hole in the disk The disk nut can then be unscrewed for servicing Care must be taken not to drill through the disk nut wall or the stem may be damaged When repairs T slot Construction are complete the parts can be reassembled with care being taken to screw the disk nut down until only a few thousandths of an inch in end A play remain in the assembly The parts can then be lock welded again by depositing weld metal at the bottom of the small hole in the disk Disk Nut Construction flowserve com na N FLOWSERVE N Figure 838 Bolted Cover Piston Check Valves may be body guided by rings on the disk or in the case of T slot disks by the disk outside diameter A similar body guiding arrange ment may be found in check valves Some ball check valves are guided by an extension of the
8. 82 92 1028 initial 40 62 62 153 210 1046 final 28 38 43 53 43 53 106 116 145 155 ALL TORQUES ARE GIVEN IN INCH POUNDS EXCEPT WHERE NOTED flowserve com na N FLOWSERVE N Reassembly Valves of the screwed bonnet cover type construction are sealed at the bonnet by flat soft metal gaskets and O Rings Screwed in seats are also sealed by O Rings Such seals require smooth clean surfaces on body bonnet or seat Bolted bonnet valves such as Figure 848 type are sealed with spiral wound gaskets In all valves new gaskets and O Rings are recommended for reassembly Bonnet gaskets and 0 Rings are inexpensive and available out of factory stock Valves with screwed bonnet cover joints require the bonnet threads to be well lubricated and tightened to develop sufficient gasket compression Bolted Bonnet Cover Torques A torque wrench should be used for tightening the bonnet which is used to preload the spiral wound gaskets The following procedure is recommended 1 Guard against leakage by having these capscrews tight at all times 2 Capscrews should be tightened to the torque shown below Bolt diameter Inches Torque Ft Lbs Step 1 Snug to approximately 10 of full recommended torque Sequence 1 2 3 Step 2 Torque to approximately 75 of full recommended torque Sequence 4 3 2 Step 3 Torque to full recommended torque Sequence 1 2 3 4 Maintenance Manual Edw
9. FLOWSE RVE USER INSTRUCTIONS Edward Valves Installation Edward Forged Steel Valves Bolted and Screwed Bonnet Types Op eration FCD EVENIM2001 04 AQ 10 15 Replaces V 376 R3 Maintenance Experience In Motion z FLOWSERVE Maintenance Manual Edward Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 Contents Typical Valves Designs Introduction Seat and Set Finishing Disks and Disk Tack Welds Backseat and Packings Gland Bolts Reassembly General Information CO CO NI a BY cw i FLOWSERVE Maintenance Manual Edward Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 Typical Valve Designs Figure 158 Screwed Bonnet Stop Screwed Gland Inside Screw Screwed in Seat Figure 1048Y Bolted Bonnet Stop Bolted Gland 0 8 8 Y Figure 1443 ANGLE BLOW OFF Figure 1441 i STRAIGHTWAY m l BLOW OFF VALVE Figure 838 Bolted Bonnet Bolted Gland 0 S amp Y Bolted Cover Piston Check Introduction This manual is provided to help you service your Flowserve Edward Tools Forged Steel valves Before disassembling any valve we recommend that you check the valve identification plate and note size figure number and pressure class so that you can identify it in the appropriate Flowserve Edward Valve catalog This catalog will show typical cross sections to help identify the various parts Most Flowserve Edward Forged Steel valves may be readily disassem b
10. ard Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 NOTE The steps for tightening cover capscrews is for the purpose of pulling the cover down evenly If this objective can be achieved without following this suggested method precisely then some variation from this method is permissible Seat Ring amp Bonnet Cover Torques n Bonnet Cover Valve Size Figure Number Seat Ring Torque Torque 1 4 3 8 1 2 158 160 75 40 3 4 158 160 100 120 60 1 158 160 240 260 125 1 1 4 1 1 2 158 160 320 340 150 158 160 5158 2 400 420 300 5160 9160 Welding Flowserve Edward Valves into Piping Welding is outside the scope of this manual but Flowserve recommends you consult the appropriate welding procedure in ASME ANSI B31 or whatever other codes apply to your system When welding Flowserve Edward valves into piping make sure there is no foreign material on the seat joint then Close the valve tightly to avoid distorting the seats After welding open the valve and flush the line to clean out all foreign matter Lubrication In order to obtain full service life valves require periodic lubrication of the stem threads Exposed threads should be wiped clean of old grease and accumulated dirt and fresh lubricant applied This is most effective ly done with the valve in the closed position For valves that see frequent operation such as motor actuated the lubricant should be replenished every three months
11. at Notes On Valve Maintenance When replacing the bonnet gaskets follow the torque requirements on page 9 closely Failure to torque the gasket properly will result in gasket failure When replacing the valve stem packing never machine the packing chamber oversize This will result in blowout of the packing How To Order Parts During normal working hours call 800 225 6989 or 919 832 0525 To assure the correct parts for your Flowserve Edward valve include the valve size the figure number including any prefix and or suffixes and if available the B M number All nuclear valves require the B M number to properly identify your valve This information is located on the valve nameplate The nameplate is attached to a yoke leg via a cable If the nameplate is inaccessible you can use your Flowserve Edward sales drawing please include the drawing number as well SERVICE If you have any further questions on valve repair or part replacement your Flowserve representative will be happy to assist you Flowserve Edward catalogs are available on request Maintenance Manual Edward Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 Flowserve Corporation has established industry leadership in the design and manufacture of its products When properly selected this Flowserve product is designed to perform its intended function safely during its useful life However the purchaser or user of Flowserve products should be aware that Flowserve
12. e If screwed in seats are badly damaged it may be more economical to replace them with new seats however if they are repairable they may be remachined on a lathe The part should be accurately centered in the lathe before machining Seats can be cut with highspeed tool bits Stellite faced seats must be machined with tungsten carbide tools or by grinding In replacing a screwed in seat in the valve body care should be taken that the face on the body against i FLOWSERVE Maintenance Manual Edward Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 LX All ea Ti Stellite Wire Construction Stop Check valve disks are not attached to the stem and respond to the fluid flow in the same manner as check valve disks see below The disk seating face can be repaired in a similar manner to that described for seats Lapping with Valve Disk Assembly The effectiveness of valve seat lapping can best be judged by blueing the disk and rotating it lightly in the seat A full contact should be obtained around the circumference of the seat A valve that shows this full contact should be pressure tight after assembly when proper stem Figure 846 Typical Stop Check Valve with Body Guided Disk load is applied Valve stems are normally provided with a radius at the disk contact 3 to give center loading If foreign material gets between this spherical Disks an d Disk Tack Wel ds surface and the disk or if galling occurs it may not be possible
13. he purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications under a wide variety of industrial service conditions Although Flowserve can and often does provide general guidelines it cannot provide specific data and warnings for all possible applications The pur chaser user must therefore assume the ultimate responsibility for the proper sizing and selection installation operation and maintenance of Flowserve products The purchaser user should read and understand the Installation Operation Maintenance IOM instructions included with the product and train its employees and contractors in the safe use of Flowserve products in connection with the specific application While the information and specifications contained in this literature are believed to be accurate they are supplied for informative purposes only and should not be considered certified or as a guarantee of satisfactory results by reliance thereon Nothing contained herein is to be construed as a warranty or guarantee express or implied regarding any matter with respect to this product Because Flowserve is continually improving and upgrading its product design the specifications dimensions and information contained herein are subject to change without notice Should any question arise concerning these provisions the purchaser user should contact Flowserve Corporation at any one of its worldwide operations or offices 2015
14. led with ordinary hand tools For the removal of screwed in valve seats a special wrench may be necessary Disassembly EDWARD VALVES INC BOLTED BONNET o RALEIGH NG 27603 SIZE 1 00 Confirm the valve is not under pressure when disassembling valves 3 s FIG 1049Y 3600 CWP l a B M 00707421 0000000 1830 PSI AT 800F MAX BODY A105 BONNET A105 PACKING TORQUE FT LBS H pal INITIAL PRELOAD 7 SOS rug THEN RELOADAT 3 DATEOFMFR 07 1997 IMPORTANT SEE EDWARD VALVE MANUAL E FOR MAINTEN AND ASSEMBLY INSTR STEM THREADS MUST BE KEPT LUBED WITH EP 2 Typical Identification Plates flowserve com IGo 4 a N FLOWSERVE Maintenance Manual Edward Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 Bolted Bonnet which the seat shoulder rests is clean and true to provide a tight seal New O Rings should always be used Surfaces should be blued and checked for contact all the way around when replacing a seat Care should be taken that reworking does not throw the sealing face between body and seat out of line with the seat threads In bolted bonnet cover style valves cap screws should be removed see page 3 and below The bonnet assembly or cover can then be removed and the interior of the valve exposed Figure 238 Bolted Cover Strainer Screwed Bonnet Integral Seat Small Vaes of the screwed bonnet type are disassembled by Integral valve seating surfaces cannot be removed for repair Once the unscrewing the bonnet
15. ng sets This is a combination of packing using braided rings at the top and bottom of the packing chamber and flexible graphite packing in the center section Packing glands should be tightened down enough to prevent leakage but not enough to develop excessive operating torque When the gland has advanced approximately half way into the packing chamber it is recommended that additional packing rings be added To obtain best results the stem should be thoroughly cleaned Replacement packing should be the same as that originally furnished Flowserve Edward valve packings are inhibited to prevent stem pitting in service We recommend packing be purchased from Flowserve Raleigh to assure packing with the proper density and corrosion inhibitors is always used IMPORTANT e Long service life from modern graphitic packing requires that adequate preloads be applied when repacking e All parts should be clean and not scored or pitted especially the stem e The stem disk and bonnet should be in the valve prior to installing the new packing e Position split packing with the ends of adjacent rings rotated 90 e Standard packing Top Ring Braided Ring Center Ring Flexible Graphite Ring Bottom Ring Same as top e Clean and lubricate the gland bolts e Tamp the packing down by hand using the gland e IMPORTANT Apply the recommended torque to the gland nuts evenly without cocking the gland See table e Tighten nuts to the initial
16. o a flow forced through a very small opening This increased velocity subse quently gives rise to the cutting of both disk and seat particularly by particles of line scale or rust in Suspension or normal solids in solution In spite of the fact that the hard surfaced material on the seat and disk is corrosionand erosion resistant grooves pit marks or other surface irregularities may be formed on the seat and disk joint surfaces when the disk is closed against a foreign body on the seat This sometimes occurs during the initial start up of a piping system Leakage of steam through a valve that is badly steam cut has a whis tling or sonorous sound If the valve is only slightly steam cut however leakage is identified by subdued gurgling or weak popping sounds These sounds can be heard through a stethoscope or by placing one end of a stick against the valve body while holding the other end be tween the teeth with hands over the ears Figure 2 Angle Piston Lift Check Valves Orientation Limits Vertical 45 max Horizontal flowserve com KS A FLOWSERVE N Notes On Valve Operation Valves equipped with electric motor actuators have special tags attached which indicate the correct torque switch setting for the valve Exceeding these torque switch settings can cause damage to the valve Never use an electric motor actuator to backseat a valve This can result in damage to the valve stem and bonnet backse
17. r line inclination and bonnet roll angle should not be combined All check and stop check valves should be installed with 10 or more diameters of straight pipe upstream of the valve to minimize flow disturbances For additional information refer to the Technical section of the Flowserve Edward Valves Catalog Publication FCD EVENCTO001 Figure 45 Inclined Bonnet Piston Lift Check Valves 20 max Maximum Check Valve Orientation Limits Ay ion a 4 VAN Maximum Allowable Deviation From Horizontal J Ho Vertical ee Maximum Deviation From Vertical pa N Vaive in Vertical Pipeline 45 max 5 ta 95 ari Vertical From Horizontal 20 max 20 max e Ei K Maximum Rolt Angle About Horizontal a E Maintenance Manual Edward Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 Seat and Disk joint leaks A leak existing between the seat and disk of a closed valve might be indicated by one of the following a definite pressure loss in the high pressure side of the valve continued flow through an inspection drain on the low pressure side or in hot water or steam lines a downstream pipe that remains hot beyond the usual length of time and conductivity range Such a leak may be the result of closing on dirt scale or other foreign matter in the line It may also develop because of the operator s failure to close the valve tightly An increased velocity is imparted t
18. values shown then loosen and retighten to the final range e Stroke the stem and then recheck the torque on the gland bolts FLOWSERVE dab Gland Bolts Packing Chamber Schematic Yoke Bushing Maintenance Manual Edward Forged Steel Valves FCD EVENIM2001 04 AQ 10 15 The yoke bushings of small Flowserve Edward valves are threaded to AT Ts a So ba Pa FLEXIBLE GRAPHITE RING BRAIDED RINGS 2 Valves of the Figure 158 5158 9158 see pg 3 type have a packing nut with threads that should be kept well lubricated to prevent corrosion and eliminate packing adjustment difficulties Gland Bolts The removal of glands is accomplished by removing the nuts Swing bolts can be removed by also driving out the pin Swing Type 1 4 3 8 1 2 Packing Gland Torque FIGURE NUMBERS VALVE SIZE 3 4 the yoke Bushings are subject to wear in services where large amounts of grit accumulate on the valve threads Lubrication aids easy operation of valves and reduces wear of yoke bushings 138 final 125 130 FT LB 140 145 FT LB 265 270 FT LB 280 285 FT LB 435 440 FT LB 5158 9158 828 829 initial 21 40 62 153 210 847 848 849 868 869 final 8 18 15 25 24 34 59 69 81 91 1029 1047 initia 21 40 62 153 210 1048 1068 1069 final 15 25 28 38 43 53 106 116 145 155 1441 1443 initia 250 287 1641 1643 final 71 81
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