SECTION 230523 GENERAL DUTY VALVES FOR HVAC PIPING PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Provisions of the Contract and of the Contract Documents apply to this Section. 1.2 DEFINITIONS A. The following are standard abbreviations for valves: 1. CWP: Cold working pressure. 2. EPDM: Ethylene-propylene-diene terpolymer rubber. 3. MPTFE: Modified polytetrafluoroethylene plastic. 4. NBR: Acrylonitrile-butadiene rubber. 5. PTFE: Polytetrafluoroethylene plastic. 6. RPTFE: Reinforced polytetrafluoroethylene plastic. 7. SWP: Steam working pressure. 8. TFE: Tetrafluoroethylene plastic. 9. WOG: Water Oil Gas. 1.3 SUBMITTALS A. Product Data: For each type of valve proposed. Include body, seating, and trim materials; valve design; pressure and temperature classifications; end connections; arrangement; dimensions; and required clearances. Include proposed specialties and accessories. 1.4 QUALITY ASSURANCE A. ASME Compliance: ASME B31.1 for power piping valves and ASME B31.9 for building services piping valves. 1. Exceptions: Domestic hot- and cold-water valves unless referenced. B. ASME Compliance for Ferrous Valves: ASME B16.10 and ASME B16.34 for dimension and design criteria. C. NSF Compliance: NSF 61 for valve materials for potable-water service. 1.5 DELIVERY, STORAGE, AND HANDLING A. Prepare valves for shipping as follows: 1. Protect internal parts against rust and corrosion. GENERAL DUTY VALVES FOR HVAC PIPING 230523-1
2. Protect threads, flange faces, grooves, and weld ends. 3. Set ball valves open to minimize exposure of functional surfaces. 4. Set butterfly valves closed or slightly open. 5. Block check valves in either closed or open position. B. Use the following precautions during storage: 1. Maintain valve end protection. 2. Store valves indoors and maintain at higher than ambient dew-point temperature. If outdoor storage is necessary, store valves off the ground in watertight enclosures. C. Use sling to handle large valves; rig sling to avoid damage to exposed parts. Do not use handwheels or stems as lifting or rigging points. PART 2 - PRODUCTS 2.1 VALVES, GENERAL A. Refer to Part 3 "Valve Applications" Article for applications of valves. B. Bronze & Brass: Shall be dezincification resistant. (Zinc content shall be less than 15%) C. Bronze Valves: 2 and smaller with threaded ends, unless otherwise indicated. D. Ferrous Valves: 2-1/2 and larger with flanged ends, unless otherwise indicated. E. Valve Pressure and Temperature Ratings: Not less than indicated for system pressure and temperature. F. Valve Sizes: Same as the larger of the upstream or downstream pipe, unless otherwise indicated. G. Valve Actuators: 1. As indicated in other Part 2 articles. 2. Where indicated, provide a chain actuator. 3. Chain Actuator: For attachment to valves of size and mounting height indicated. 4. Wrench: For plug valves with square heads. Furnish Owner with 1 wrench for every 10 plug valves, for each size square plug head. H. Extended Valve Stems: Provide on insulated valves. I. Valve Flanges: Provide ASME B16.1 for cast-iron valves, ASME B16.5 for steel, and ASME B16.24 for bronze. J. Valve Grooved Ends: AWWA C606. K. Threaded: With threads according to ASME B1.20.1. GENERAL DUTY VALVES FOR HVAC PIPING 230523-2
L. Valve Bypass and Drain Connections: MSS SP-45. 2.2 COPPER-ALLOY BALL VALVES A. Two-Piece, Copper-Alloy Ball Valves (Full Port): 1. Conbraco Industries-Apollo 77C series with stainless steel ball & stem (Un-insulated piping) 2. Conbraco Industries-Apollo 77C series with stainless steel ball & stem. Provide 2 ¼ stem extension (Insulated piping) 3. Other Manufacturers: b. Watts c. Nibco 4. Handle Nut: Zinc plated steel or 300 series stainless steel. 5. Handle: Zinc plated steel, clear chromate plastic, or vinyl coated. 6. Threaded Pack Gland: Brass ASTM B-16 Alloy 360 7. Packing: MPTFE or TFE 8. Stem (Blowout Proof): ASTM A-276 type 316 stainless steel. Provide 2 ¼ stem extension for Insulated piping. 9. Thrust Washer: MPTFE or RPTFE 10. Ball: Full-port, ASTM A-276 Type 316 stainless steel. 11. Seats: MPTFE or Reinforced TFE 12. Body: Bronze ASTM B-584 for solder or threaded connection. 13. Body End Piece: Bronze ASTM B-584 for solder or threaded connection. 14. Rating: 150 psig saturated steam, 600 psig non-shock cold water, oil, and gas. 15. Conform To: MSS SP-110 2.3 FERROUS-ALLOY BUTTERFLY VALVES A. General: Butterfly valves shall provide bi-directional bubble tight dead end service without a downstream flange. B. Wafer-lug type butterfly valves: 1. Conbraco Industries-Apollo 141(wafer)/143(lug) a. Stockham b. Demco c. Nibco 3. Shaft: ASTM A-582 Type 416 Stainless steel single piece through shaft. 4. Collar Bushing: ASTM B-124 Brass or PTFE. 5. Stem Seal: EPDM OR Buna-N Rubber 6. Body Seal: EPDM Rubber 7. Upper Bushing: CDA 122 Copper or PTFE 8. Liner: EPDM Rubber 9. Disc: ASTM B-148 alloy 954/955 aluminum bronze. 10. Lower Bushing: CDA 122 copper or PTFE. GENERAL DUTY VALVES FOR HVAC PIPING 230523-3
11. Body Wafer: ASTM A-536 Ductile Iron or ASTM A-126 CL. B cast iron. 12. Body Lug: ASTM A-536 Ductile Iron or ASTM A-126 CL. B cast iron. 13. Ratings: a. 2 through 12 200 psig CWP. b. 14 through 24 150 psig CWP. 14. Conform To: MSS SP-67, MSS SP-25, API-609 15. Operator: a. Valves up to and including 6 : Lever-lock operator. b. Valves 8 and larger: Self locking worm gear operator equipped with adjustable stops at open and shut positions. C. Grooved-End 300 psig butterfly valves: 1. NIBCO Model GD 4765 a. Victaulic 3. Upper Stem: ASTM A-582 Type 416 Stainless steel. 4. Upper Bearing: Split metal. 5. O-Ring: EPDM 6. Body: ASTM A-395 ductile iron with polymide coating. 7. Disc: ASTM A-395 ductile iron with EPDM encapsulation. 8. Lower Bearing: Split metal. 9. Dust Plug: PVC 10. Rating: 300 psig CWP. 11. Conform To: MSS SP-67 12. Operator: a. Valves up to and including 6 : Lever-lock operator. b. Valves 8 and larger: Self locking worm gear operator equipped with adjustable stops at open and shut positions. D. Flanged 200 psig butterfly valves: 1. NIBCO Model FC-2765-0 2. Upper Stem: ASTM A-582 Type 416 Stainless steel. 3. Upper Bushing: TFE over porous bronze, steel backed. 4. O-Ring: EPDM 5. Body: ASTM A-126 Class B cast iron with polymide coating. 6. Disc: ASTM A-395 ductile iron with EPDM encapsulation. 7. Lower Bushing: TFE over porous bronze, steel backed. 8. Lower Stem: ASTM A-582 Type 416 Stainless steel. 9. Dust Plug: PVC 10. Rating: 200 psig CWP. 11. Conform To: MSS SP-67 and MSS SP-25 12. Operator: a. Valves up to and including 6 : Lever-lock operator. b. Valves 8 and larger: Self locking worm gear operator equipped with adjustable stops at open and shut positions. GENERAL DUTY VALVES FOR HVAC PIPING 230523-4
2.4 BRONZE CHECK VALVES UNIVERSITY SERVICES ANNEX A. Bronze, Horizontal Swing Check Valves: 1. NIBCO Model 413 b. Stockham 3. Bonnet: ASTM B-62 bronze. 4. Body: ASTM B-62 bronze. 5. Hinge Pin: ASTM B-140 alloy C31400 bronze, or B-134 alloy C23000 bronze. 6. Disc Hanger: a. Sizes ¼ thru ¾ : Type 304 stainless steel. b. Sizes 1 and larger: ASTM B-62 bronze. 7. Hanger Nut: ASTM B-16 bronze. 8. Disc Holder: ASTM B-62 bronze. 9. Seat Disc: a. Water and Other Heat Transfer Fluids: ASTM B-62 bronze. b. Steam: TFE 10. Seat Disc Nut: ASTM B-16 or B-62 bronze. 11. Hinge Pin Plug: ASTM B-140 alloy C31600 bronze. 12. Seat Disc Washer (When Provided): ASTM B-98 alloy C65500 or B-103 bronze. 13. Rating: 125 psig SWP and 200 psig CWP. 14. Conform To: MSS SP-80 B. Bronze, Inline Spring Loaded Check Valves: 1. Conbraco Industries-Apollo 61-100 series b. Stockham c. Nibco 3. Body: ASTM B-584 alloy C84400 bronze. 4. Retainer/Stem: ASTM B16 brass or ASTM A-582 alloy C30300 stainless steel. 5. Ball Check: RPTFE or 6. Disc Holder 316 Stainless steel a. Disc: 1) Water, Oil, Gas: Buna-N 2) Steam: TFE b. Seat Screw: ASTM A-276 alloy S43000 stainless steel. c. Body End: ASTM B-584 alloy C84400 bronze. d. Rating: 125 psig SWP and 250 psig CWP. 7. Guide: ASTM B16 Brass 8. Spring: Type 316 stainless steel. 9. Rating: 125 psig SWP and 400 psig WOG. 2.5 IRON BODY CHECK VALVES A. Iron Body, Horizontal Swing Check Valves: GENERAL DUTY VALVES FOR HVAC PIPING 230523-5
1. NIBCO Model 918-B b. Stockham 3. Body Bolt: ASTM A-307 steel. 4. Bonnet: ASTM A-126 class B cast iron. 5. Body Gasket: Synthetic Fibers. 6. Body Nut: ASTM A-307 steel 7. Side Plug: ASTM B-16 alloy C36000 Brass. 8. Hanger Pin: ASTM B-16 alloy C36000 Brass. 9. Hanger: ASTM B-584 alloy C84400 cast bronze. 10. Disc: ASTM B-584 alloy C84400 cast bronze or ASTM A-536 ductile iron w/bronze face ring. 11. Seat Ring: ASTM B-584 alloy C84400 cast bronze. 12. Disc Nut: ASTM B-16 alloy C36000. 13. Body: ASTM A-126 class B cast iron. 14. Disc Bolt: ASTM B-16 alloy C36000 Brass. 15. Disc Plate: ASTM A-126 class B cast iron. 16. Disc Cage: ASTM A-126 class B cast iron. 17. Rating: 125 psig SWP and 200 psig CWP. 18. Conform To: MSS SP-71 Type 1. B. Grooved-End, Ductile-Iron Spring Assisted Check Valves: Victaulic Series 716 with EPDM disc seal. C. Spring Actuated Silent Check Valves: 1. NIBCO Model F-910 b. Stockham 3. Body: ASTM A48 class 35 cast iron. 4. Seat: ASTM B-584 alloy C83600 (B) bronze. 5. Disc: ASTM B-584 alloy C83600 bronze. 6. Spring: Type 302 ASTM A313 stainless steel. 7. Bushing: a. 6 and Smaller: ASTM B-16 brass b. 8 and Larger: ASTM B-584 alloy C83600 bronze. 8. Set Screws: Type 304 ASTM A-276 stainless steel. 9. Rating: 200 psig CWP. 10. Conform To: MIL-V-18436F PART 3 - EXECUTION GENERAL DUTY VALVES FOR HVAC PIPING 230523-6
3.1 EXAMINATION A. Examine valve interior for cleanliness, freedom from foreign matter, and corrosion. Remove special packing materials, such as blocks, used to prevent disc movement during shipping and handling. B. Operate valves in positions from fully- pen to fully-closed. Examine guides and seats made accessible by such operations. C. Examine threads on valve and mating pipe for form and cleanliness. D. Examine mating flange faces for conditions that might cause leakage. Check bolting for proper size, length, and material. Verify that gasket is of proper size, that its material composition is suitable for service, and that it is free from defects and damage. E. Do not attempt to repair defective valves; replace with new valves. 3.2 VALVE INSTALLATION A. Install valves with unions or flanges at each piece of equipment arranged to allow service, maintenance, and equipment removal without system shutdown. B. Locate valves for easy access and provide separate support where indicated. C. Install valves in horizontal piping with stem at or above center of pipe. D. Install valves in position to allow full stem movement. E. Install chainwheels on operators for ball and butterfly valves 4 and larger and more than 96 inches above finished floor. Extend chains to 60 inches above finished floor. F. Install check valves for proper direction of flow and as follows: 1. Swing Check Valves: In horizontal position with hinge pin level. 2. Center-Guided and Plate-Type Check Valves: In horizontal or vertical position, between flanges. 3. Lift Check Valves: With stem upright and plumb. 3.3 ADJUSTING A. Adjust or replace valve packing after piping systems have been tested and put into service but before final testing and balancing. Replace valves if persistent leaking occurs. GENERAL DUTY VALVES FOR HVAC PIPING 230523-7
3.4 VALVE APPLICATIONS UNIVERSITY SERVICES ANNEX A. Refer to piping Sections for specific valve applications. If valve applications are not indicated, use the following: 1. Shutoff Service: Ball or butterfly valves. 2. Throttling Service: Ball or butterfly valves. 3. Pump Discharge: Spring-loaded, lift-disc check valves and ball or butterfly valves. B. If valves with specified SWP classes or CWP ratings are not available, the same types of valves with higher SWP class or CWP ratings may be substituted. C. Heating Hot Water Loop Piping (Use the following types of valves): 1. Valves, NPS 2 and Smaller: Two-Piece, Copper-Alloy Ball Valves (Full Port). 2. Valves, NPS 2-1/2 and 3 : a. Two-piece or three-piece, Copper-Alloy Ball Valves (Full Port). b. Wafer-Lug, grooved-end, or flanged butterfly valves. 3. Valves, NPS 4 and Larger: Wafer-Lug, grooved-end, or flanged butterfly valves. 4. Pump Discharge Check Valves (Horizontal or Vertical), NPS 2 and Smaller: Bronze, Inline Spring Loaded Check Valves or triple duty valve. 5. Horizontal Check Valves, NPS 2 and Smaller: Bronze, Horizontal Swing Check Valves. 6. Vertical Check Valves, NPS 2 and Smaller: Bronze, Inline Lift Check Valves. 7. Pump Discharge Check Valves (Horizontal or Vertical), NPS 2-1/2 and Larger: Grooved-End, Ductile-Iron Spring Assisted Check Valves, Spring Actuated Silent Check Valves, or triple duty valve. 8. Horizontal Check Valves, NPS 2-1/2 and Larger: Bronze, Horizontal Swing Check Valves. 9. Vertical Check Valves, NPS 2-1/2 and Larger: Grooved-End, Ductile-Iron Spring Assisted Check Valves or Spring Actuated Silent Check Valves. END OF SECTION 230523 GENERAL DUTY VALVES FOR HVAC PIPING 230523-8