Relief Valves (RL4 Series) - Precision Fitting

1 Relief Valves (RL4 Series) Catalog 4131-RLRevised, July 2001 Flow CalculationsInletPressureWaterAirPressur eDrop P@ 60 F (16 C)@ 60 F (16 C)psigbarpsigbargpmm3/hrscfmm3 ferrule A-LOK compression portF-ANSI/ASME ,Internal pipe threadsM-ANSI/ASME ,External pipe threadsZ-Single ferrule CPITM compression portKF-British Standard BS21(ISO 7-1), Internal pipethreadsKM-British Standard BS21(ISO 7-1), External pipethreadsIntroductionParker RL4 Relief Valves are designed such that when the upstream pressure exceeds the closing force exertedby the spring, the lower stem opens, permitting flow through the valve. Flow through the valve increasesproportionately to the increase in upstream End ConnectionsSpecifications Working pressure: Up to 400 psig (28 bar) CWP Up to 600 psig (41 bar) during Relief with no internal seal damage. Cracking pressure: Seven springs with the following ranges: 10-25 psig, 25-50 psig, 50-100 psig, 100-150 psig, 150-225 psig, 225-400 psig and 0-225 psig (See table on page 3 for bar equivalents).

2 Temperature Rating: Buna-N Rubber-30 F to 225 F (-34 C to 107 C) Highly Fluorinated Fluorocarbon Rubber-20 F to 200 F (-29 C to 93 C) Ethylene Propylene Rubber-70 F to 275 F (-57 C to 135 C) Fluorocarbon Rubber-10 F to 400 F (-23 C to 204 C)Neoprene Rubber-45 F to 250 F (-43 C to 121 C) rl4 series Relief ValveParker Hannifin CorporationInstrumentation Valve DivisionJacksonville, Alabama2 Features Pressure settings are externally adjustable whilethe valve is in operation. Seven different springranges provide greater system sensitivity andenhanced performance. Manual override option with positive stemretraction is available for the full working pres-sures range. This option permits the user to relieveupstream pressure while maintaining the predeter-mined cracking pressure. Standard low friction synergistic coating of bodybonnet improves crack and re-seal performance.

3 Color coded springs and labels indicate springcracking range. Back pressure has minimum effect on crackingpressure. Lock wire feature secures a given pressure "Hex1" ( ).59( ) ( ) ( ) ( ) ( ) ( )7/8" Hex1" HexModel Shown: 4M4F-RL4A-VT-SS-MN-KDModel Shown: 4A-RL4A-BNT-SS-KCFlow Data / Dimensions( ) Denotes dimensions in millimeters For CPI and A-LOK , dimensions are measured with nuts in the finger tight position. Tested in accordance with ISA Gas flow will be choked when P1 - P2 / P1 = xT .Spring KitsCracking PressureCracking PressureKit Part NumberRange (psig)Range (bar)Color Kit Contains:SpringCoded labelPTFE washersLocking wire / lead sealInstallation InstructionsRL4 series Relief ValveParker Hannifin CorporationInstrumentation Valve DivisionJacksonville, Alabama End Connections Flow Data Dimensions Basic Part(Inlet)(Outlet)

4 OrificeCvxT A BNumberPort 1 Port 2inchmminchmminchmm4A-RL4A1/4" A-LOK Compression1/4" A-LOK " CPI Compression1/4" CPI " Male NPT1/4" A-LOK " Male NPT1/4" CPI " Male NPT1/4" Female " Female BSP/ISO Tapered1/4" Female BSP/ISO " Male BSP/ISO Tapered1/4" Male BSP/ISO A-LOK Compression6mm A-LOK CPI Compression6mm CPI A-LOK Compression8mm A-LOK CPI Compression8mm CPI Seal KitsSeal KitSeat / SealOrder NumberMaterialKIT-RL4-VTFluorocarbon RubberKIT-RL4-BNTBuna-N RubberKIT-RL4-EPRTE thylene Propylene RubberKIT-RL4-NETN eoprene RubberKIT-RL4-KZTH ighly FluorinatedFluorocarbon RubberSeal Kit Contains:Stem SealBonnet SealPTFE Back-Up RingLower Stem AssemblyMaintenance Instructions Copyright 2001, Parker Hannifin Corporation. All Rights to OrderThe correct part number is easily derived from the following number sequence.

5 The eight product characteristicsrequired are coded as shown below. *Note: If the inlet and outlet ports are the same, eliminate the outlet :4Z*-RL4A-BNT-SS--KD123 45 6 7 8 InletOutletValveSealsBack-UpBodyActuatio n SpringPortPortSeriesRingMaterialKitDescr ibes a RL4A series externally adjustable Relief valve equipped with 1/4" CPITM compression inlet and outletports, Buna-N seals, PTFE back-up ring, stainless steel construction, and a 100 to 150 psig ( to bar)spring :4M4F-RL4A-EPRT-SS-MN-KF123 45 6 7 8 InletOutletValveSealsBack-UpBodyActuatio n SpringPortPortSeriesRingMaterialKitDescr ibes a RL4A series externally adjustable Relief valve equipped with 1/4" male NPT inlet port, 1/4" femaleNPT outlet port, ethylene propylene seals, PTFE back-up ring, stainless steel construction, manual overrideoption, and a 10 to 225 psig ( to bar) spring series Relief Valve1 234 5 *67 8 *InletOutletValveSealsBack-UpBodyActuati onSpringPortPortSeriesRingsMaterialKitPa rker Hannifin CorporationInstrumentation Valve DivisionJacksonville, Alabama4KA: 10 - 25 psigKB: 25 - 50 psigKC: 50 - 100 psigKD: 100 - 150 psigKE: 150 - 225 psigKF: 10 - 225 psigKG.

6 225-400 psig4M - Male NPT4F - Female NPT4A - A-LOK Compression4Z - CPITM Compression4KF - Female BSP/ISO4KM - Male BSP/ISOM6A - A-LOK CompressionM6Z - CPITM CompressionM8A - A-LOK CompressionM8Z - CPITM CompressionRL4AV - FluorocarbonRubberEPR - EthylenePropylene RubberBN - Buna-N RubberKZ - Highly FluorinatedFluorocarbon RubberNE - Neoprene RubberT - PTFESS - Stainless SteelBlank - StandardMN - ManualOverride*Note: To order valve with an elastomer back-up ring, eliminate circled number sequence 5. To order only the valve without a spring kit, eliminate circlednumber sequence , IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS AND/OR SYSTEMS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONALINJURY AND PROPERTY document and other information from Parker Hannifin Corporation, its subsidiaries and authorized distributors provide product and/or system options for further investigation by usershaving technical expertise.

7 It is important that you analyze all aspects of your application and review the information concerning the product or system in the current product catalog. Due tothe variety of operating conditions and applications for these products or systems, the user, through its own analysis and testing, is solely responsible for making the final selection of theproducts and systems and assuring that all performance, safety and warning requirements of the application are products described herein, including without limitation, product features, specifications, designs, availability and pricing, are subject to change by Parker Hannifin Corporation and itssubsidiaries at any time without of SaleThe items described in this document are hereby offered for sale by Parker Hannifin Corporation, its subsidiaries or its authorized distributors. This offer and itsacceptance are governed by the provisions stated in the Offer of Sale located in Catalog 4110-U Needle Valves (U series ).

8 rl4 series Relief ValveParker Hannifin CorporationInstrumentation Valve DivisionJacksonville, Alabama5 Note: Valves which are not actuated for a period of time may initiallycrack at higher than set crack :To determine MPa, multiply bar by Shown: 4Z-RL4A-VT-SS-MN-KGModel Shown: 4Z-RL4A-BNT-SS-KECrack Pressure vs. Re-seal PressureMaterials of ConstructionPart No. Part DescriptionMaterial1 CapASTM A 479 Type 3162 Spring17Cr-7Ni Stainless Steel3 Locknut316 Stainless Steel4 Upper StemASTM A 479 Type 3165 BonnetASTM A 479 Type 316*6 Stem Seal*PTFE coated Fluorocarbon Rubber*7 Lower StemASTM A 479 Type 3168 Plug316 SS9 WasherPTFE*10 Body BonnetASTM A 479 Type 31611 Back-up RingPTFE*12 Bonnet Seal*Fluorocarbon Rubber*13 Seat*Fluorocarbon Rubber*14 Valve BodyASTM A 182 Type F31615 Handle StemASTM A 479 Type 31616 HandlePhenolic*Wetted Parts*Optional seat and seal materials are located in How to : Perfluorinated polyether.

9 **213941051112671314891615Re-seal Pressure (bar)Re-seal Pressure (psig) 0 3 7 10 14 17 21 24 28 Crack Pressure (psig)Crack Pressure (bar)400350300250200150100500 10 50 100 150 200 250 300 350 400282421171410730 Catalog 4131-RL, 30M, 07/01 INSTRUMENTATIONVALVE DIVISIONAN ISO 9001 FACILITYA ccredited by the Dutch Council for CertificationQuality SystemsRegistrars, Hannifin CorporationInstrumentation Valve Division2651 Alabama Highway 21 NorthJacksonville, AL 36265-9681 USAP hone: (256) 435-2130 Fax: (256) Hannifin plcInstrumentation Products DivisionRiverside RoadPottington Business ParkBarnstaple, Devon EX31 1 NPEnglandPhone: +44 (0) 1271 313131 Fax: +44 (0) 1271 373636 Email.