CONTROLS R OPERATION AND MAINTENANCE MANUAL RESILIENT SEATED BUTTERFLY VALVES 20/21, 22/23, 30/31, 3A/3AH, 31H, 31U, 32/33, 35/36, 36H The High Performance Company
Table Of Contents: page Safety Instructions: Definition Of Terms . .......................................................................1 Introduction .........................................................................................................................1 Shipment & Storage . ...........................................................................................................1 Installation Considerations . ...........................................................................
BRAY Resilient Seated BFV Operation and Maintenance Manual Safety Instructions - Definition of Terms READ AND FOLLOW THESE INSTRUCTIONS SAVE THESE INSTRUCTIONS ! WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. ! CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
BRAY Resilient Seated BFV Operation and Maintenance Manual Installation Considerations – Piping and Valve Orientation and Placement Piping and Flanged Compatibilities Piping These valves have been engineered so that the critical disc chord dimension at the full open position will clear the adjacent inside diameter of most types of piping, including Schedule 40, lined pipe, heavy wall, etc.
BRAY Resilient Seated BFV Operation and Maintenance Manual 3. Valve Location a. Resilient seated butterfly valves should be installed if possible a minimum of 6 pipe diameters from other line elements, i.e., elbows, pumps, valves, etc. of course, 6 pipe diameters are not always practical, but it is important to achieve as much distance as possible. b.
BRAY Resilient Seated BFV Operation and Maintenance Manual Valve Orientation (Continued) c. Resilient seated butterfly valve located at the discharge of a pump should be oriented as follows: INCORRECT INSTALLATION i.) For centrifugal Pump – Pump shaft horizontal and stem vertical Pump Shaft (Horizontal) Pump Shaft (Horizontal) FLOW FLOW Stem (Horizontal) ii.
BRAY Resilient Seated BFV Operation and Maintenance Manual Valve Orientation (Continued) d. Butterfly valves located downstream of a bend or pipe reducer should be oriented as follows: INCORRECT INSTALLATION CORRECT INSTALLATION i.) Bend Stem (Vertical) Stem (Horizontal) FLOW FLOW ii.) Tee Stem (Vertical) Stem (Horizontal) FLOW FLOW iii.
BRAY Resilient Seated BFV Operation and Maintenance Manual Valve Orientation (Continued) e. Butterfly valves in combination for control/isolation applications should be installed as follows: FLOW INCORRECT INSTALLATION Combination with all valve stems in the same direction accelerates possible noise, vibration, & erosion problems. Installation Procedure A. General Installation 1. Make sure the pipeline and pipe flange faces are clean.
BRAY Resilient Seated BFV Operation and Maintenance Manual Figure 1 – Insert Resilient Seated Butterfly Valve Between Flanges INCORRECT INSTALLATION CORRECT INSTALLATION CAUTION Pipe spread and aligned, disc rotated; Results; no undesirable beginning seating/ unseating torque, disc edge protected. ! Pipe not spread, disc opened beyond valve body face; Results; Disc edge damaged when it hits pipe flange. 6.
BRAY Resilient Seated BFV Operation and Maintenance Manual Figure 3 – Initial Centering & Flanging of Valve Gasket INCORRECT INSTALLATION CORRECT INSTALLATION Disc in closed position; gaskets used; Results Bolts snugged, not torqued tight, disc edge – Seat distorted and over-compressed causing within body face-to-face but not fully closed, high initial unseating torque problems. no flange gaskets; Results: No disc edge damage, proper sealing allowed.
BRAY Resilient Seated BFV Operation and Maintenance Manual When resilient seated butterfly valves are to be installed between ASME welding type flanges, care should be taken to abide by the following procedure to ensure no damage will occur to the seat: 1. Place the valve between the flanges with the flange bores and valve body aligned properly. The disc should be in the 10° open position. 2. 3. 4. 5. Span the body with the bolts.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix A Disassembly/Assembly Instructions Series 20/21 Resilient Seated Butterfly Valves Disassembly 1. Remove handle, gear operator or power actuator from actuator mounting flange. 2. Remove the body bolts and pull the lower body half away from the seat. 3. Pull the seat and disc stem from the upper body half. 4. Remove bushing and seal from the upper body. 5.
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BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix B Disassembly/Assembly Instructions Series 22/23 Resilient Seated Butterfly Valves Disassembly – 1. Remove the handle, gear operator, or power actuator from actuator mounting flange. 2. Remove the “Spirolox”® retaining ring and the two C-ring stem retainers from the stem hole. 3. Then remove the stem, bushing and seal. 4. Remove the disc from the seat, protecting the disc edge at all times. 5.
BRAY Resilient Seated BFV Operation and Maintenance Manual SERIES 22/23 12 RESILIENT SEATED BUTTERFLY VALVES 7 6 1. BODY 2. DISC 3. SEAT 4. UPPER STEM 5. LOWER STEM 6. BUSHING 7. UPPER STEM SEAL 8. SEAL CAPSULE 9. BEARING 10. SEAT ENERGIZER 11. CAP SCREW 12. RETAINER 13. BODY SEAL 14.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix C Disassembly/Assembly Instructions Series 30/31 Resilient Seated Butterfly Valves Disassembly – 1. Remove the handle, gear operator, or power actuator from actuator mounting flange. 2. Remove the “Spirolox”® retaining ring and the two C-ring stem retainers from the stem hole. 3. Then remove the stem, bushing and seal. 4. Remove the disc from the seat, protecting the disc edge at all times. 5.
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BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix D Disassembly/Assembly Instructions Series 3A/3AH Resilient Seated Butterfly Valves Disassembly – 1. Remove the handle, gear operator, or power actuator from actuator mounting flange. 2. Remove the “Spirolox”® retaining ring and the two C-ring stem retainers from the stem hole. 3. Then remove the stem, bushing and seal. 4. Remove the disc from the seat, protecting the disc edge at all times.
BRAY Resilient Seated BFV Operation and Maintenance Manual SERIES 3A/3AH RESILIENT SEATED BUTTERFLY VALVES 1. 2. 3. 4. 5. 6. 7. 8. 9.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix E Disassembly/Assembly Instructions Series 31H Resilient Seated Butterfly Valves Disassembly – 1. Remove the handle, gear operator, or power actuator from actuator mounting flange. 2. Remove the “Spirolox”® retaining ring and the two C-ring stem retainers from the stem hole. 3. Then remove the stem, bushing and seal. 4. Remove the disc from the seat, protecting the disc edge at all times.
BRAY Resilient Seated BFV Operation and Maintenance Manual SERIES 31H RESILIENT SEATED BUTTERFLY VALVES 1. 2. 3. 4. 5. 6. 7. 8. 9.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix F Disassembly/Assembly Instructions Series 31U Resilient Seated Butterfly Valves Disassembly – 1. Remove the handle, gear operator, or power actuator from actuator mounting flange. 2. Remove the “Spirolox”® retaining ring and the two C-ring stem retainers from the stem hole. 3. Then remove the top stem bushing and seal, upper stem and retaining rod. 4. Remove the disc from the seat, protecting the disc edge at all times. 5.
BRAY Resilient Seated BFV Operation and Maintenance Manual SERIES 31U 11 RESILIENT SEATED BUTTERFLY VALVES 1. 2. 3. 4. 5. 6. 7. 8. BODY DISC UPPER STEM LOWER STEM SEAT BEARING STEM SEAL STEM BUSHING 9. 10. 11. 12. 13. 14.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix G Disassembly/Assembly Instructions Series 32/33 Resilient Seated Butterfly Valves Disassembly – 1. Remove the gear operator or power actuator from the actuator mounting flange. 2. Secure the valve in a horizontal position with the taper-pin nuts facing upward. ! CAUTION Prior to removal of the valve stem the valve disc must be secured and supported to insure it does not drop out of the valve body once the stem is removed.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix G (Cont’d) Disassembly/Assembly Instructions Series 32/33 Resilient Seated Butterfly Valves Assembly – 1. Replace bottom thrust bearing and plate. 2. Push the seat into an oval and push it into the body with seat stem holes aligned to body stem holes. 3. De-bur taper-pin grooves in the stem. 4. Push stem into stem hole of body until the bottom of the stem is flush with the inner top edge of the seat.
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BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix H Disassembly/Assembly Instructions Series 35/36 Resilient Seated Butterfly Valves (Taper Pin Disc/Stem Connection) Disassembly – 1. Remove the gear operator or power actuator from the actuator mounting flange. 2. Secure the valve in a horizontal position with the taper-pin nuts facing upward.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix H (Cont’d) Disassembly/Assembly Instructions Series 35/36 Resilient Seated Butterfly Valves (Taper Pin Disc/Stem Connection) Assembly – 1. Replace bottom thrust bearing and plate. 2. Push the seat into an oval and push it into the body with seat stem holes aligned to body stem holes. Note: Valves 54” and larger are provided with the seat bonded to the body and therefore is not easily field replaceable.
BRAY Resilient Seated BFV Operation and Maintenance Manual SERIES 35/36 RESILIENT SEATED BUTTERFLY VALVES (Taper Pin Disc/Stem Connection) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. BODY DISC STEM SEAT STEM PACKING STEM BEARING TAPER PIN WASHER NUT O-RING 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix I Disassembly/Assembly Instructions Series 35/36 Resilient Seated Butterfly Valves (Internal Spline or Keyed Disc/Stem Connection) Disassembly – 1. Remove the gear operator or power actuator from the actuator mounting flange. 2. Secure the valve in a horizontal position. ! CAUTION Prior to removal of the valve stems the valve disc must be secured and supported to insure it does not drop out of the valve body once the stems are removed.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix I (Cont’d) Disassembly/Assembly Instructions Series 35/36 Resilient Seated Butterfly Valves (Internal Spline or Keyed Disc/Stem Connection) Disassembly – 6. Removal of packing and bearings: a. Remove the stem packing. b. Use a slotted screwdriver to carefully remove the upper and lower stem bearings. 7.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix I (Cont’d) Disassembly/Assembly Instructions Series 35/36 Resilient Seated Butterfly Valves (Internal Spline or Keyed Disc/Stem Connection) Assembly – 2. Installation of the valve disc: Note: Before installing the disc, check to assure the upper and lower stems are matched to the upper and lower stem holes in the disc. a.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix I (Cont’d) Disassembly/Assembly Instructions Series 35/36 Resilient Seated Butterfly Valves (Internal Spline or Keyed Disc/Stem Connection) Assembly – 4. Installation of the upper stem: ! CAUTION a. Hoist the valve to an angle and secure it (be careful not to go to high so the lower stem does not drop out). b. Remove the upper stem from the valve. c.
BRAY Resilient Seated BFV Operation and Maintenance Manual SERIES 35/36 RESILIENT SEATED BUTTERFLY VALVES (Internal Spline Valve) 1. 2. 3. 4. 5. 6. 7. 8. 9. BODY DISC UPPER STEM SEAT KEY TIE BOLT STEM BEARING STEM PACKING PACKING GLAND FOLLOWER 10. PACKING GLAND 11. 12. 13. 14. 15. 16. 17. 18. 19. 20.
BRAY Resilient Seated BFV Operation and Maintenance Manual SERIES 35/36 5 RESILIENT SEATED BUTTERFLY VALVES (Internal Keyed Valve) 1. 2. 3. 4. 5. 6. 7. 8. 9. BODY DISC UPPER STEM SEAT KEY TIE BOLT STEM BEARING STEM PACKING PACKING GLAND FOLLOWER 10. PACKING GLAND 11. 12. 13. 14. 15. 16. 17. 18. 19. 20.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix J Disassembly/Assembly Instructions Series 36H Resilient Seated Butterfly Valves Disassembly – 1. Remove the gear operator or power actuator from the actuator mounting flange. 2. Secure the valve in a horizontal position with the taper-pin nuts facing upward. ! CAUTION Prior to removal of the valve stem the valve disc must be secured and supported to insure it does not drop out of the valve body once the stem is removed.
BRAY Resilient Seated BFV Operation and Maintenance Manual Appendix J (Cont’d) Disassembly/Assembly Instructions Series 36H Resilient Seated Butterfly Valves Assembly – 1. Replace bottom thrust bearing and plate. 2. De-bur taper-pin grooves in the stem. 3. Push stem into stem hole of body until the bottom of the stem is flush with the inner top edge of the seat. Note: The end of the stem containing the keyway must be toward the top of the valve body. 4.
BRAY Resilient Seated BFV Operation and Maintenance Manual SERIES 36H RESILIENT SEATED BUTTERFLY VALVES 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 36 BODY DISC STEM SEAT STEM PACKING STEM BEARING TAPER PIN WASHER NUT O-RING 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21.
CONTROLS R A Division of BRAY INTERNATIONAL, Inc. 13333 Westland East Blvd. Houston, Texas 77041 281/894-5454 FAX 281/894-9499 www.bray.com Bray® is a registered trademark of Bray International, Inc. © 2012 Bray International. All rights reserved.
