35,000 Safety & Relief Valves Ready To Ship

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North AmericanSafety ValveIndustries, Inc.35,000Safety & Relief ValvesReady to ShipWhen the pressure is on, trust North American Safety Valve IndustriesWe’re Always on StandbyWhen you’re under pressure, NASVI’s ready to help.New & Remanufactured Safety ValvesExtensive stock of new valves from trusted,top manufacturers and dependable remanufacturedvalves back by a 2-year warranty.Same or Next-Day ShippingAvoid or minimize downtime with NASVI’s same or next-day shipping.spec sheetState-of-the-Art Repair & Setting CentersNearly every safety valve’s specifications are at our technicians’fingertips for exact work. Generally, irreparable valves can bereplaced from our in-stock inventory.Turnaround Exchange ProgramReceive the valves needed for installation prior to shutting down,then ship us the old valves for repair or exchange.Get an Instant Quotenasvi.com/quote1600 Warren St.North Kansas City, MO 64116Phone: (800) 800-8882Phone: (816) 421-7042Fax: (816) 421-0297sales@nasvi.com

Pressure Relief Valves1541/1543 SeriesConsolidated Safety Valve

Table of ContentsConversion Table 1541/1543.2Features & Benefits 1541/1543.3Applications 1541/1543.3Scope of Design 1541/1543.4Materials 1541/1543.5Dimensions & Weights 1541/1543.7Orifice Capacities 1541/1543.8Valve Configuration Code 1541/1543.12How to Order a 1541/1543 Safety Valve 1541/1543.131541/1543 Series Safety Valve 1541/1543.1

Conversion TableAll the USCS values are converted toMetric values using the following conversion factors:USCS UnitConversion FactorMetric psig0.06894757bargft lb1.3558181Nm F5/9 ( F-32) C21541/1543.2 Dresser Consolidated

Consolidated Type 1541 and 1543 safety valves are designedfor steam and other compressible fluids. They are most commonly used in pharmaceutical, dying and process plants.Features & BenefitsThe 1541/1543 Series Safety Valve:   Equipped with two adjusting rings to allow for sharp opening actionand full lift at 3% overpressure.   Low spindle bearing point between the spindle and disc for improvedtightness. Self-aligning spring washer for reliability and long life.   Precision wound spring, 5% tolerance on rate to ensurerepeatability and maximum tightness. Manufactured and capacitycertified to ASME Code Sections I and VIII. Valves tested on steam. Seats checked for tightness on steam.   The adjustable lifting mechanism can be positioned in any locationwith 300 degrees of rotation to facilitate ease of installation.Applications   Options1543-3: A duplicate of the 1543 valve, but supplied with a304 stainless base and disc.1541-3: A duplicate of the 1541 valve, but supplied with a304 stainless steel base and disc.Bronze Bonnet: When cast iron bonnets are not permitted, a bronzebonnet option is available.Soft Seats: A PTFE soft seat option is available for improvedtightness. This option is only available for ASMECode Section VIII application.INLET SIZES .50" (12.7 mm) through2.50" (63.5 mm) threadedOUTLET SIZES .75" (19.1 mm) through2.50” (63.5 mm) threadedORIFICE SIZESSix sizes: D through JPRESSURE RANGE 5 psig (0.34 barg) to350 psig (24.13 barg)TEMPERATURE RANGE -20 F (-28.9 C) to420 F (215.6 C)MATERIALS Cast iron bonnet with brass baseand trim is standard. Availablewith bronze bonnet. Stainlesssteel base and disc are alsooptional.CERTIFICATIONASME B&PVC Section I and VIIIBLOWDOWN4%BACK PRESSURE LIMIT 10% of Set PressureLow Pressures: For low pressures, we supply a special low pressuredesign to ensure maximum flow capacities againstatmospheric pressure.Spring: When chrome alloy springs are not permitted,A 17-7PHSS is available.   ConnectionsThe 1541 valve is supplied with inlet sizes of .75” (19.1 mm) to 2.50”(63.5mm). The 1543 sizes are supplied with inlet connections of .50”(12.7mm) to 2.00” (50.8 mm). All inlet connections are male NPT withstandard hex head on surfaces for easy wrenching.!CAUTIONThe discharged fluid may escape to theatmosphere through the bonnet vent and drainhole, so toxic or hazardous applications must beavoided.1541/1543 Series Safety Valve 1541/1543.3

Scope of Design1541 Standard Inlet & Outlet Inlet SizeMale NPT1543 Standard Inlet & Outlet ConnectionsOutlet SizeFemale Inlet SizeMale tlet SizeFemale 82.5063.5Pressure/Temperature LimitsTemperature RangeValve TypeMediaOrificemin. FMaximum Set Pressuremax. C F 9420215.635024.13Notes:1. Dresser’s current National Board Certification limits the1541-3/1543-3 to 300 psig (20.68 barg) for codestamped applications.1541/1543.4 Dresser Consolidated

Materials1541/1543 Metal Seat ValvePart & Material914PartNo.161Base2Bonnet17121311ASTM A126 Class B IronOptionalASTM B584 Alloy Leaded Semi-Red Brass3DiscASTM B124 Alloy Half Hard Brass4Lower Adjusting RingASME SB283 C37700 Copper AlloyF, G & H OrificesASTM B124 C37700 Copper Alloy535Upper Adjusting RingD, E, F & G OrificesASME SB283 C37700 Copper AlloyH & J OrificesASTM B124 C37700 Copper Alloy6Spindle (D & E Orifice)6Spindle Assembly (F & J Orifice)6ASTM A108 1213 Carbon SteelSpindle CollarASTM A276 410 Cond. T St. St.SpindleASTM A108 1213 Carbon SteelSpindle Assembly (G & H Orifice)Spindle CollarASTM A582 416 Cond. T St. St.SpindleASTM A108 1213 Carbon Steel7Spring WasherASTM A108 1213 Carbon Steel8SpringAlloy Steel9CapBrass/Commercial Grade Brass10Compression ScrewASTM B16 Half Hard Brass11Cap ScrewCarbon Steel, Zinc Plated12Lever4131Soft Seal DesignStandardD, E & J Orifices715ASTM B283 Alloy C46400 Naval Brass7815Material1026Part NameD, E, F, H & J OrificeASTM B36 Alloy 220 BrassG OrificeASTM B36 Alloy 230 BrassCompression Screw NutD, E, G, H & J OrificeASTM A108 1213 Carbon SteelF OrificeCarbon Steel, Cadmium Plated14Lifting Washer NutCommercial Grade Carbon Steel15Adjusting Ring PinASTM B16 Half Hard Brass16Lifting WasherSAE 1010 Zinc Plated Carbon Steel17Lever PinBrass/Commercial Grade Brass18Seat Washer1Teflon or Neoprene19Soft Seat Retainer Ring1Austenitic Stainless Steel (Ph15-7Mo)20Lift Limiter2ASME SA479 316/316L St. St.Notes:31. Featured on Soft Seat Only.182. 5 to 15 psig (0.34 to 1.03 barg) Only.19141541/1543 Series Safety Valve 1541/1543.5

Materials (Contd.)Optional MaterialsStainless Steel Trim (1541-3 & 1543-3)PartNo.12345Part NameBase1541D & H Orifice,1543D, E & F OrificeASME SA479 316/316L Stainless Steel1541E, F & G Orifice, 1543G OrificeASME SA479 304 Stainless Steel1543H & J OrificeASME SA351 CF8M Stainless Steel1541J OrificeASME SA351 CF8 Stainless SteelBonnetStandardASTM A126 Class B IronOptionalASTM B584 Alloy Leaded Semi-Red BrassDiscD & G OrificesASME SA479 316/316L Stainless SteelE, F, H & J OrificesASME SA479 304 Stainless SteelLower Adjusting RingD, E & J OrificesASME SB283 Copper AlloyF, G & H OrificesASTM B124 Copper AlloyUpper Adjusting RingD, E, F & G OrificesASME SB283 Copper AlloyH & J OrificesASTM B124 Copper Alloy6Spindle (D & E Orifice)6Spindle Assembly (F & J Orifice)6MaterialASTM A108 1213 Carbon SteelSpindle CollarASTM A276 410 Cond. T Stainless SteelSpindleASTM A108 1213 Carbon SteelSpindle Assembly (G & H Orifice)Spindle CollarASTM A582 416 Cond. T Stainless SteelSpindleASTM A108 1213 Carbon Steel7Spring WasherASTM A108 1213 Carbon Steel8SpringAlloy Steel9CapBrass/Commercial Grade Brass10Compression ScrewASTM B16 Half Hard Brass11Cap ScrewCarbon Steel, Zinc Plated12Lever13(D, E, F, H & J Orifice)ASTM B36 Alloy 220 Brass(G Orifice)ASTM B36 Alloy 230 BrassCompression Screw Nut(D, E, G, H & J Orifice)ASTM A108 1213 Carbon Steel(F Orifice)Carbon Steel, Cadmium Plated14Lifting Washer NutCommercial Grade Carbon Steel15Adjusting Ring PinASTM B16 Half Hard Brass16Lifting WasherSAE 1010 Zinc Plated Carbon Steel17Lever PinBrass/Commercial Grade Brass18Seat Washer (Soft Seat Only)Teflon or Neoprene19Soft Seat Retainer Ring (Soft Seat Only)Austenitic Stainless Steel (Ph15-7Mo)20Lift Limiter (5 to 15 psig Only)ASME SA479 316/316L Stainless Steel1541/1543.6 Dresser Consolidated

Dimensions & Weights1541/1543 DimensionsA!BCAUTIONDo not plug drain holes. The discharged fluidmay escape to the atmosphere through thebonnet vent and drain connections, so toxic orhazardous applications must be avoided.DCGeneral Dimensions for 1541 Safety 5209.62.00.91Note 3219.23.01.36Note 50266.74.52.04Note 63295.47.73.49Note 3.13333.510.54.76Note 15.13384.317.78.03Note 2Inlet SizeValveTypeABCDApproximateDrain HoleWeightLocationlbskgGeneral Dimensions for 1543 Safety 5209.62.00.91Note 215.92.71.22Note 25260.44.21.91Note 50292.17.53.40Note 3.25336.610.04.54Note 14.88378.016.77.57Note 2Inlet SizeValveTypeABCDApproximateDrain HoleWeightLocationlbskgNotes:1. .25” (6.3 mm) diameter drain hole located 60 to the left when facing outlet.2. .25” (6.3 mm) diameter drain hole located 90 to the left when facing outlet.3. .25” (6.3 mm) diameter drain hole located 105 to the left when facing outlet.4. .25” (6.3 mm) diameter drain hole located 110 to the left when facing outlet.1541/1543 Series Safety Valve 1541/1543.7

Orifice CapacitiesASME B&PV Code Section I, for Saturated SteamBased at 3% overpressure or 2 psig(0.14 barg), whichever is greater, showing 90% actual capacity.OrificeDesignationOrifice Set Pressure222222Orifice 68272840885441541/1543.8 Dresser Consolidated

Orifice Capacities (Contd.)ASME, B & PVC Code Section VIII, rating for Saturated SteamBased at 10% overpressure or 3 psig (0.21 barg), whichever is greater,showing 90% of actual capacity.OrificeDesignationOrifice Set Pressure222222Orifice 8282278372851886638808895390981541/1543 Series Safety Valve 1541/1543.9

Orifice Capacities (Contd.)ASME B&PV Code Section VIII, for AirBased at 10% overpressure or 3 psig (0.21 barg), whichever is greater,showing 90% of actual capacity.OrificeDesignationOrifice AreaDEFincmincmin0.1100.7100.1961.2650.30722222Set 51.2878.303222222Orifice 4.711541/1543.10 Dresser Consolidated

Orifice Capacities (Contd.)Capacities for Low pressure applicationsASME non-code applicationsSaturated Steam, Non-Code Stamped ApplicationsBased at 3 psig (0.21 barg), overpressure, showing90% of actual capacity.OrificeDesignationOrifice t 1.2878.303222222Orifice 21Low Pressure Air, Non-Code Stamped ApplicationsBased at 3 psig (0.21 barg), overpressure, showing90% of actual capacity.OrificeDesignationOrifice 78.303Set PressureOrifice 111.3565718.601541/1543 Series Safety Valve 1541/1543.11

Valve Configuration CodeINTERCHANGEABILITY NUMBERDEVIATION FROM STANDARDSTAINLESS STEEL TRIMSOFT SEATORIFICEPRESSURE DESIGNVALVE TYPEBRONZE BONNETINLET SIZE.50.751.001.251.502.002.50- 1541 D 1543EFGHJ- 21 3OrificeDALP1LP2SPSPECBRPressure Design1541 Standard ConnectionInlet Sizes*AreaDesignationPressure Rangein2cm2SET 15 psig (1.03 barg)1D0.1100.710SET 36 psig (2.48 barg)225.4E0.1961.265LP15 to 15 psig (0.34 to 1.03 barg)331.8F0.3071.981LP216 to 35 psig (1.10 to 2.41 0.8H0.7855.0652.5063.5J1.2878.303Material TrimDesignationTrimStandard1543 Standard ConnectionInlet 5038.1H0.7855.0652.0050.8J1.2878.3031541/1543.12 Dresser Consolidated Stainless Steel TrimAreaNotes:1. D to G Orifice - Metal Seat and Soft Seat,H & J Orifice - Soft Seat.2. H & J Orifice - Metal Seat.3. D to J Orifice - Metal Seat and Soft Seat.

How to Order a 1541 / 1543 Safety ValveHow to Order a 1541/1543 Safety ValvePlease Specify:ExampleNumber of valves3Inlet size (MNPT).500” (12.70 mm)Type number of valve1543-D-3Set pressure100 psig (6.89 barg)Operating pressure80 psig (5.52 barg)Operating, relieving and design temperature325 F/339 F/400 F (163 C/171 C/204 C)Built-up back pressure5 psig (0.34 barg)Allowable overpressure3%Orifice sizeDRequired capacity530 PPHService (air, steam)SteamASME Boiler & Pressure CodesSection I - fired pressure vesselsASME Section ISection VIII - unfired pressure vessels-Trim (bronze, stainless)StainlessSeat type (metal seat, soft seat)Metal SeatBonnet material (cast iron, bronze)Cast IronMaterial substitution-Accessories (spring coating)-Certification (for approval, for record)-Customer drawings (for approval, for record)for approvalNote any special needs-1541/1543 Series Safety Valve 1541/1543.13

6 Spindle (D & E Orifice) ASTM A108 1213 Carbon Steel 6 Spindle Assembly (F & J Orifice) Spindle Collar ASTM A276 410 Cond. T St. St. Spindle ASTM A108 1213 Carbon Steel 6 Spindle Assembly (G & H Orifice) Spindle Collar ASTM A582 416 Cond. T St. St. Spindle ASTM A108 1213 Carbon Steel 7 Spring Washer

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