SB12 Series Back Pressure/Relief Valves

Transcription

1 PF Published September 7, 4 SB Series Back Pressure/Relief Valves PP PVF SERIES: SB SIZES: 3/8 4 ENS: True Union Socket, Threaded or ChemFlare TM Spigot Bodies with Plain, Socket, Threaded or Flanged ends IPRGM: PTFE Bonded EPM SELS: EPM, FKM (Viton ) Spring Tensioning Bolt 3 The SB Series Back Pressure/ Relief Valve has two functions. s a back pressure valve, installed in-line downstream of a pump, the back pressure below the metering pump is maintained. When installed in the branch of a tee it is a pressure relief valve. The valve stays closed until inlet pressure reaches the set pressure which is adjusted by turning the spring tensioning bolt. Inlet pressure acts upward against the piston allowing excess pressure to flow upwards through the orifice. The SB Series has a built-in check valve function, desirable for dosing applications. It is not so sensitive as to open with every pulsation from a metering pump. features True Union Ends Easy installation and maintenance Eliminate chemical leakage problems common with old fashioned threaded connections Long Cycling Life ynamic seal is PTFE bonded EPM for high chemical resistance This moulded diaphragm is designed for superior sealing and flex life Superior Performance in osing Systems Valves are hydraulically designed for very low hysteresis ( backlash ) and to eliminate chatter Built-in check (non-return) function Valve opening depends on inlet pressure only and is uneffected by changes in downstream (back) pressure CRN Registration numbers by province Ontario: OC34.5 Newfoundland: OC34. lberta: OC34.5 Saskatchewan/Manitoba/Quebec: OC34.56 New Brunswick: OC34.57 Nova Scotia: OC34.58 P.E.I.: OC34.59 British Columbia: not required True Union Ends Easy installation and maintenance technical Set Pressure Ranges / to 5 to psi -/ and to psi -/ to 4 4 to psi (optional) to psi Maximum Viscosity cp is maximum recommended service viscosity For ChemFlare TM end connectors, consult. PP and PVF spigot ends have IN dimensions and will butt fuse directly to PP and PVF piping systems. 3 valves with EPM or FKM (Viton ) seals are certified under NSF/NSI Standard 6 for contact with drinking water. 9/4 Plastics Limited 4 is a registered trade mark of Plastics Limited

2 SB Series Back Pressure/Relief Valves / to 8 9 a 7b b 4 3 5a 7 6 c d 5b 8 L TU True Union Body I S 7a PRTS s Recommended Spare Parts No. Part Pcs. Materials Body, PP, PVF Bonnet PPG 3 Spring Galvanized Steel 4s Control PTFE bonded iaphragm EPM 5as Piston, PP, PVF 5bs Seat EPM, FPM(Viton ) 6 Lower Spring PPG Retainer 7a Upper Spring Cad. Plated Retainer Steel 7b Ball 4 SS 8 Spring Tensioning 4 SS Bolt 9 Lock Nut 4 SS Spring Bolt Cap PE a Bolt/Nut Cap 8/ PE b ex Bolt 4/6 4 SS c ex Nut 4/6 4 SS d Washer 8/ 4 SS 3 Spacer isc, PP, PVF 4 Pressure Plate PP 6 Union Nut, PP, PVF 7 End Connector, PP, PVF 8s Face O-Ring EPM, FPM(Viton ) / size / 3/4 to sizes OTER ENS L SP L S L T Spigot Body Socket Threaded Flanged L CF ChemFlare TM IMENSIONS INCES Size 3/8 / 3/4 -/4 -/ True Union bodies come standard with socket ends. Threaded union ends are available. ** Consult. 3 Spigot bodies are used for non union socket, threaded or flanged ends. ll spigot ends have metric dimensions and the PP and PVF spigots butt fuse directly to PP and PVF piping. 4 Tube size can be reduced to /4 tube, LCF = 7.74 for /4, 8.6 for 3/8. MXIMUM PRESSURES PSI Size / C 68 F C 86 F I S PP PVF C 4 F L TU C F 5 L SP C 86 F L S C 4 F C F C F 37.5 C 58 F 5 C 86 F C F Temperature Ranges: to C (3 to F), PP to C ( to 58 F), PVF to C ( to F). L T L CF PP and PVF L SP 3 L TU ** WEIGTS LB C 58 F PP PVF C 76 F Cv VLUES USGPM Flow at psi # P C 94 F C F 5

3 SB Series Back Pressure/Relief Valves / to pressure loss nomogram for SB valves 3/8 to Cv = typical dosing system schematic 4.5. Injector System Bleed Valve 5. Pressure Loss p (psi) /8 / 3/4 -/4 -/ True Union Ball Valve Chemical Container SB Series Back Pressure/Relief Valve Y-Sediment Strainer Gauge Isolator c/w Gauge Gauge Isolator c/w djustable Pressure Switch Calibration Cylinder Flow Meter osing System rain Valve Water at o C (68 o F) application of pressure relief valves Constant System Pressure Consumer and/or Open, Valve Closes Non-Return Valve Container is located above the pump Overflow Valve Pressure of container or application system should not exceed the maximum pressure value P max P max = Working Pressure = Pressure = Set Pressure

4 SB Series Back Pressure/Relief Valves / to working pressure vs. flow rate The curves show the relationship between the working pressure and the approximate 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 4 psi for / to valves. For valves -/ to 4, hysteresis is approximately 4.5 psi. operation examples. The valve is set closed at psi. t a pressure increase of psi, a flow of approximately. USGPM will be reached. set pressure = psi working pressure = psi opening pressure = approximately 4 psi. The valve is set closed at psi. t a pressure increase of psi, a flow of approximately. USGPM will be reached. set pressure = psi working pressure = psi opening pressure = approximately 54 psi Working Over Pressure (psi) / Valves Valves / Valves /8 Valves..5. 3/4 Valves. 4 -/4 Valves. 5 Valves. SB example SB example / Flow Flow Rate Rate (USGPM) (USGPM) -/ Flow Flow Rate Rate (USGPM) (USGPM)

5 SB Series Back Pressure/Relief Valves -/ to 4 PRTS s Recommended Spare Parts No. Part Pcs. Materials a Body, PP, PVF Bonnet PPG 3 Spring Galvanized Steel 4s Control iaphragm PTFE bonded EPM 5as Piston, PP, PVF 5bs Seat EPM, FPM(Viton ) b a 5cs Seat Retainer, PP, PVF 6 Lower Spring Retainer PPG 7 Upper Spring Retauner 4 SS 8 Spring Tensioning Bolt 4 SS 9 Lock Nut 4 SS Spring Bolt Cap PE a ex Bolt/Nut Cap PE b ex Bolt/Stud 4 SS c ex Nut 4 SS 5b 5c c I S d Washer 4 SS 3 Spacer isc, PP, PVF 4 Spacer O ring EPM, FPM(Viton ) L S large upper bolts, shorter lower bolts, 8 studs Spigot Body OTER ENS ChemFlare TM Ends For connection to PF tube. Leak-free connections for difficult services such as sodium hypochlorite Socket Threaded Flanged L S L T IMENSIONS INCES WEIGTS LB., PP & PVF Size -/ L SP I SP PP PVF Plain spigot ends in PP & PVF may be butt fused directly to PP & PVF piping systems. Weights based on spigot bodies. Cv VLUES USGPM Flow at psi # P MXIMUM PRESSURES PSI PP PVF C C C C C C C C C C C C C Size 68 F 86 F 4 F F 68 F 86 F 4 F F F 58 F 86 F F 58 F -/ Temperature Ranges: to C (3 to F), PP to C ( to 58 F), PVF to C ( to F). C 76 F C 94 F C F 5 ORERING EXMPLE Back Pressure/ Relief Valves SB 5 V U Body Material B PP K PVF Size 3 3/8 5 / 7 3/4 -/4 5 -/ 5 -/ 3 4 Elastomers E EPM V FPM (Viton ) Ends S Socket T Threaded F Flanged U Union Socket CFx ChemFlare TM Blank Spigot (Butt) Example: SB Series,, / diameter, FPM (Viton ) seals, Union socket ends. x = 4 for /4, 6 for 3/8, 8 for /, for I tube connections. OPTIONS 4 to psi Pressure Range springs for -/ to 4 valves Integral Pressure Gauge for inlet and/or outlet Bodies in 36 Stainless Steel and PTFE Optional Pressure Gauge For inlet and/or outlet

6 SB Series Back Pressure/Relief Valves -/ to 4 working pressure vs. flow rate Whether the pressure is rising or falling, hysteresis is approximately 4.5 psi for -/ to 4 valves -/ Valves / 4 to psi set pressure range -/ Valves / 7.5 to psi set pressure range Valves / 4 to psi 3 set pressure range. 8 3 Valves / 7.5 to psi set pressure range. 8 4 Valves / 4 to psi set pressure range 4 Valves / 7.5 to psi set pressure range Guardsman Road, Thornhill, ON, L3T 6L, Canada ISO :8 Certified tel fax request@chemline.com chemline.com