SR50 Series Pressure Regulating (Reducing) Valves
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- Anastasia Maxwell
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1 PDF Published July 7, SR5 Series Pressure Regulating (Reducing) Valves The Chemline SR 5 Series Pressure Regulating (Reducing) valves maintains a set downstream pressure independent of higher variable upstream pressures. s downstream pressure increases reaching the set pressure, the valve closes. It opens as soon as the downstream pressure decreases below set pressure. The SR 5 is sensitive and provides precise control. One application is to protect filters from damaging pressure surges. PVC PP PVDF SERIES: SR5 SIZES: /8 ENDS: True Union Socket, Threaded or ChemFlare TM Spigot Bodies with Plain, Socket, Threaded or Flanged ends DIPHRGM: PTFE Bonded EPDM SELS: EPDM, FKM (Viton ) Spring Tensioning Bolt features True Union Ends Easy installation and maintenance Eliminate chemical leakage problems common with old fashioned threaded connections Long Cycling Life Dynamic seal is PTFE bonded EPDM for high chemical resistance This moulded diaphragm is designed for superior sealing and flex life Designed for Superior Performance Designed for minimum hysteresis Seat is hydraulically designed to eliminate chatter CRN Registration numbers by province Ontario: OC.5 Newfoundland: OC.5 lberta: OC.5 Saskatchewan/Manitoba/Quebec: OC.56 New Brunswick: OC.57 Nova Scotia: OC.58 P.E.I.: OC.59 British Columbia: not required technical Downstream Set Pressure Ranges / to 5 to psi -/ and 5 to 9 psi Maximum Viscosity cp is maximum recommended service viscosity True Union Ends Easy installation and maintenance For ChemFlare TM end connectors, consult Chemline. PP and PVDF spigot ends have DIN dimensions and will butt fuse directly to Chemline PP and PVDF piping systems. 6 SS and PTFE bodies are also available. Consult Chemline. PVC valves with EPDM or FKM (Viton ) seals are certified under NSF/NSI Standard 6 for contact with drinking water. 7/ Chemline Plastics Limited Chemline is a registered trade mark of Chemline Plastics Limited
2 Pressure Regulating (Reducing) Valves how they work configuration example The SR5 controls downstream pressure, which must always be below the inlet pressure. It is normally open until the downstream pressure (which acts on the control diaphragm) reaches the set pressure, adjustable with the spring tensioning bolt. t this point the valve closes. It opens again as soon as downstream pressure decreases slightly below the set pressure. The large diaphragm provides for sensitive and precise control. The valve seat opens and closes until a balance is achieved between the spring force (set pressure) and the downstream pressure. working pressure vs. flow rate The curves show the relationship between the working pressure and the flow rate through the valve for water at O C (68 O F). These values will vary depending on: the configuration of the piping and the pressure losses associated with it the fluid if not water at O C (68 O F) whether the pressure is rising or falling, hysteresis is approximately to 6 psi. Over p max p s p w =p c p o p min Q= p o p c Q Pressure Reduction ( p) Hysteresis (H) Q max p s = set pressure p w = working pressure p o = opening pressure p c = closing pressure p P = pump pressure H = p o p c = hysteresis p = p w p s = flow dependent pressure reduction Q = flow application of pressure regulating valves Secondary Pressure System Dynamically Flowing If the ball valve is closed, the working pressure Pw rises by the ampount of the closing pressure Pc Secondary Pressure System Closed If the ball valve is opened, the working pressure Pw drops by the ampount of the opening pressure P O p p p w Q > p p p w Q = open closed Pump Pump À = pressure reducing valve Á = ball valve  = pressure relief valve
3 Pressure Regulating (Reducing) Valves /8 to D 8 9 7a 7b H a a b b d 6 a 5a d L SP Spigot Body 7 6 c d 5c 5b c b 8 L TU True Union Body OTHER ENDS L S L F L CF Flanged Socket ChemFlare TM l S L T Threaded PRTS s Recommended Spare Parts No. Part Pcs. Materials Body PVC, PP, PVDF Bonnet PPG Spring Galvanized Steel s Control PTFE bonded Diaphragm EPDM 5as Piston PVC, PP, PVDF 5bs Seat EPDM,FPM(Viton ) 5cs Seat PVC, PP, PVDF 6 Lower Spring PPG 7a Upper Spring Cad. Plated Steel 7b Ball SS 8 Spring Tensioning SS Bolt 9 Lock Nut SS Spring Bolt Cap PE a Piston Bolt SS b Piston Bolt Washer SS a Bolt/Nut Caps 8/ PE b Hex Bolt /6 SS c Hex Nut /6 SS d Washer 8/ SS Piston Guide PVC, PP, PVDF as Small Guide O-Ring EPDM,FPM(Viton ) bs Large Guide O-Ring EPDM,FPM(Viton ) cs Med. Guide O-Ring EPDM,FPM(Viton ) ds Pilot Port O-Ring EPDM,FPM(Viton ) 6 Union Nut PVC, PP, PVDF 7 End Connector PVC, PP, PVDF 8s Face O-Ring EPDM,FPM(Viton ) / size / / to sizes. DIMENSIONS INCHES Size /8 / / -/ -/ D H I S L TU PVC L SP L S MXIMUM PRESSURES PSI PVC PP PVDF C C C 5 C C C 5 C 6 C C C 5 C C Size 68 F 86 F F F 86 F F F F 58 F 86 F F 58 F / Temperature Ranges: PVC to 5 C ( to F), PP to C (5 to 58 F), PVDF to C ( to F). L T L F PP and PVDF L SP L TU ** WEIGHTS LB. True Union bodies come standard with socket ends. Threaded union ends are available. ** Consult Chemline. Spigot bodies are used for non union socket, threaded or flanged ends. ll spigot ends have metric dimensions and the PP and PVDF spigots butt fuse directly to Chemline PP and PVDF piping. Tube size can be reduced to / tube, LCF = 7.7 for /, 8.6 for /8. L CF PVC C 76 F 5 PP C 9 F PVDF C F 5
4 Pressure Regulating (Reducing) Valves -/, H L S a b 6 b D 6 5c 5d c 5e b L SP Spigot Body NON UNION ENDS d I SP 8 9 7a 7b d b Socket Threaded Flanged L T a 5a 5b 5 a L F PRTS No. Part Pcs. Materials s Recommended Spare Parts Body PVC, PP, PVDF Bonnet PPG a/b Spring Set Galvanized Steel s Control PTFE bonded Diaphragm EPDM 5as Piston PVC, PP, PVDF 5bs Seat EPDM,FPM(Viton ) 5cs Seat PVC, PP, PVDF 5ds Plug PVC, PP, PVDF 5es Plug O-Ring EPDM,FPM(Viton ) 6 Lower Spring PPG 7a Upper Spring Cad. Plated Steel 7b Ball SS 8 Tensioning Bolt SS 9 Lock Nut SS Spring Bolt Cap PE a Piston Bolt SS b Piston Bolt Washer SS c Piston Nut SS a Bolt/Nut Cap PE b Bolt/Stud Set SS c Hex Nut 6 SS d Washer SS Piston Guide PVC, PP, PVDF s Guide O-Ring EPDM,FPM(Viton ) 5 Base PVC, PP, PVDF 6 Base O-Ring EPDM,FPM(Viton ) large upper bolts, shorter lower bolts, 8 studs DIMENSIONS INCHES WEIGHTS LB. PVC, PP & PVDF PVC Size D H L SP l SP L S L T L F PVC PP PVDF -/ Plain spigot ends in PP and PVDF may be butt fused directly to Chemline PP and PVDF piping systems. Weights based on spigot bodies. ORDERING EXMPLE Chemline Pressure Regulating Valves Body Material PVC B PP K PVDF SR5 5 V U Size /8 5 / 7 / -/ 5 -/ 5 -/ Elastomers E EPDM V FPM (Viton ) Ends S Socket T Threaded F Flanged U Union Socket CFx ChemFlare TM Blank Spigot (Butt) Example: Chemline SR 5 Series, PVC, / diameter, FPM (Viton ) seals, union socket ends. x = for /, 6 for /8, 8 for /, for ID tube connections. OPTIONS Optional Pressure Gauge For inlet and/or outlet ChemFlare TM Ends For connection to PF tube. Leak-free connections for difficult services such as sodium hypochlorite
5 Pressure Regulating (Reducing) Valves /8 to 5 /8 Valves 5 / Valves / Valves Valves. 5. -/ Valves -/ Valves Valves
6 Pressure Regulating (Reducing) Valves -/, working pressures vs. flow rate / Valves 8 6 v < m/s v > m/s 8 Valves v < m/s v > m/s Guardsman Road, Thornhill, ON, LT 6L, Canada ISO 9:8 Certified tel fax request@chemline.com chemline.com
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