Metering Valves: S, M, L, and 31 Series

www.swagelok.comMetering ValvesS, M, L, and 31 Series■ Straight-pattern flow coefficients (C v ) from 0.004 to 0.15■ Low- and high-pressure service■ Repeatable vernier handles available■ Brass and 316 stainless steel materials

2 Metering ValvesFeaturesLow-Pressure Valves (S, M, and L Series)■ Straight-pattern flow coefficients (C v ) from 0.004 to 0.15■ Forged-body 316 SS or brass construction■ Straight, angle, cross, and double patterns■ Panel mounting■ Knurled, round, vernier, slotted, and adjustable-torquehandles■ Swagelok ® tube fitting, male NPT, and integral VCR ® fittingend connectionsTechnical DataSeriesSMLPressure-TemperatureRatingsTemperature°F (°C)–10 to 400(–23 to 204)—fluorocarbonFKM O-rings;–10 to 300(–23 to 148)—Buna NO-ringsWorkingPressurepsig (bar)2000(137)1000(68.9)➀Orificein. (mm)0.032(0.81)0.056(1.42)0.128(3.25)ShutoffServiceNoNoYesStemTaper(IncludedAngle)1°3°5°Lock screw“locks in” flowsettings (knurled andslotted handles)Tapered stem tipaccurately controls gasand liquid flow ratesS, M, and L SeriesS series valve shown.Stem threadsare isolated fromsystem fluidHandle dead-stophelps preventdamage to stemand orificeStem O-ringcontains systemfluid➀ Downstream pressure 500 psig (34.4 bar) max when valve requiresadjustment at pressure due to strength limitations of the fine-pitch threads andhigh operating torque.High-Pressure Valves (31 Series)■ Flow coefficient of 0.04; orifice of 0.062 in. (1.6 mm)■ 316 SS bar stock body■ Straight and angle patterns■ Metal-to-metal shutoff■ 2° stem taper (included angle)■ Panel mounting■ Round phenolic handle■ Swagelok tube fitting and female NPT end connectionsPressure-Temperature Ratings ➀ASME Class 2080Material Group 2.2Material Name316 SSPacking nutpermits simpleexternaladjustment440C SSregulating stemhardened forenhancedservice lifePacking fullycontained by316 SS glands toprevent extrusionMetal-to-metalshutoffTemperature, °F (°C)Working pressure, psig (bar)–65 (–53) to 100 (37)200 (93)300 (148)400 (204)450 (232)500 (260)600 (315)650 (343)700 (371)750 (398)800 (426)850 (454)5000 (344)4295 (295)3875 (266)3560 (245)3435 (236)3310 (228)3130 (215)3080 (212)3000 (206)2930 (201)2880 (198)2815 (193)31 SeriesTapered stem tipaccurately controlsgas and liquid flowratesFor more information about ASME classes, material groups, and ratings, see theSwagelok Valve Pressure-Temperature Ratings technical bulletin.➀ Ratings based on optional Grafoil ® packing; ratings limited to 450°F (232°C)at 3435 psig (236 bar) with standard PTFE packing.

Metering Valves 3Materials of ConstructionLow-Pressure Valves (S, M, and L Series)High-Pressure Valves (31 Series)1a21a2341b2327813454 58 67784589699 910S series M series L series1a1bComponentHandleHandle screwLock screw➀HandleHandle screw2 Panel mount nutValve Body MaterialsBrass316 SSMaterial Grade/ASTM SpecificationSilver-mist chrome-plated300 SS/A276brass 360/B16Black oxide and light oil-coated alloy steel/ANSI 18.3Green anodized aluminum 6061-T651/B211Black oxide and light oil-coated alloy steel/ANSI 18.3Silver-mist chrome-platedbrass 360/B163 Bonnet sleeve Sintered 316 SS316 SS/A479—S, M;316 SS/B783—L4 BonnetSilver-mist chrome-platedbrass 345/B435316 SS/A4795 Stem guide ring Glass-filled PTFE6 Body extension ➁ Silver-mist chrome-platedbrass 345/B435316 SS/A4797 Body seal ➁ Buna N Fluorocarbon FKM8 Stem316 SS/A479 Hard chrome-plated 316 SS/A479O-ringsBuna NFluorocarbon FKM9 BodySilver-mist chrome-platedbrass 377/B283316 SS/A182LubricantsMolybdenum-disulfide based; silicone basedWetted components listed in italics.➀ Anaerobic-type adhesive.➁ Straight and double-pattern M series valves.Material Grade/Component ASTM Specification1 HandlePhenolic/D4617Nickel-cadmiumSet screwplated steel2 Packing nut316 SS/A2763 Upper gland4 Packing PTFE/D17105 Lower gland 316 SS/A2766 Stem 440C SS/A2767 Panel nut 316 SS/B7838 Union nut 316 SS/A2769 Bonnet316 SS/A47910 BodyNickel antiseize withLubricanthydrocarbon carrierTestingThe Swagelok S and M metering valve designs have beenshell tested to a requirement of no detectable leakage with aliquid leak detector.Every Swagelok L series metering valve is tested for bubbletightshutoff at 100 psig (6.8 bar) differential pressure.Every Swagelok 31 series needle valve is factory tested withnitrogen at 1000 psig (69 bar). Seats have a maximumallowable leak rate of 0.1 std cm 3 /min.Cleaning and PackagingEvery Swagelok metering valve is cleaned and packaged inaccordance with Swagelok Specification SC-10. Cleaning andpackaging in accordance with Special Cleaning andPackaging (SC-11) is standard for metering valves with VCRface seal fitting end connections, and is available as anoption for all others.

4 Metering ValvesFlow Data at 70°F (20°C)S SeriesFlow Coefficient at Turns OpenFlow Coefficient (C v )0.00400.00350.00300.00250.00200.00150.00100.000500 2 4 6 8 10Number of Turns OpenMaximum Flow—0.004 C vPressureDrop toAtmospherepsi (bar)Air Flowstd ft 3 /min(std L/min)Water FlowU.S. gal/min(L/min)10 (0.68) 0.04 (1.1) 0.01 (0.03)50 (3.4) 0.10 (2.8) 0.02 (0.07)100 (6.8) 0.20 (5.6) 0.04 (0.15)Factory Flow SettingThe handle dead stop is set at 4 to 10std cm 3 /min with 15 psig (1.0 bar) inletpressure.Ordering InformationSelect an ordering number.S, M, and L SeriesFor brass S, M, and L series valves,replace SS with B.Example: B-SS1GpanelholeStraight patternENAM SeriesFlow Coefficient at Turns OpenFlow Coefficient (C v )0.0300.0250.0200.0150.0100.005002 4 6Number of Turns OpenL SeriesFlow Coefficient at Turns Open8Maximum Flow—0.03 C vPressureDrop toAtmospherepsi (bar)Air Flowstd ft 3 /min(std L/min)Maximum Flow—0.15 C vWater FlowU.S. gal/min(L/min)10 (0.68) 0.33 (9.3) 0.09 (0.34)50 (3.4) 0.90 (25.4) 0.21 (0.79)100 (6.8) 1.5 (42.4) 0.30 (1.1)SWAGELOKM series valve shown.S series—0.16 in. (4.1 mm) maximum panelthickness.M and L series—0.13 in. (3.3 mm) maximum panelthickness.31 SeriesFor angle-pattern 31 series valves, add-A to the ordering number.Example: SS-31RS4-ABSWAGELOKFlow Coefficient (C v )Flow Coefficient (C v )0.1400.1200.1000.0800.0600.0400.0200.0400.0350.0300.0250.0200.015000.0100.0052 4 6 8Number of Turns Open31 SeriesFlow Coefficient at Turns Open10PressureDrop toAtmospherepsi (bar)Shutoff ServiceAir Flowstd ft 3 /min(std L/min)Stainless steel L series valves are notrecommended for shutoff in vacuum orgas service, or for repetitive shutoff inliquid service.Maximum Flow—0.04 C vWater FlowU.S. gal/min(L/min)10 (0.68) 1.6 (45.3) 0.47 (1.7)50 (3.4) 4.5 (127) 1.0 (3.7)100 (6.8) 7.9 (223) 1.5 5.6)PressureDrop toAtmospherepsi (bar)Air Flowstd ft 3 /min(std L/min)Water FlowU.S. gal/min(L/min)10 (0.68) 0.45 (12.7) 0.12 (0.45)50 (3.4) 1.2 (33.9) 0.28 (1.0)100 (6.8) 2.1 (59.4) 0.40 (1.5)0.38 (9.6)max panelthicknessStraight patternB1.38(35.1)AB0.59 (15.0)panel hole1.09(27.7)3.60(91.4)open0.38(9.6)002 4 6 8 10Number of Turns Open

Metering Valves 5DimensionsDimensions, in inches (millimeters), arefor reference only and are subject tochange.ANDSWAGELOK0.38 (9.6)max panelthicknessAngle patternBESWAGELOKAngle pattern1.38(35.1)Gpanelhole0.59 (15.0)panel holeDHopenEnd ConnectionsInlet/Outlet SizeSwageloktube fittingsMale VCRfittingOrderingNumber1/16 in. SS-SS11/8 in. SS-SS21/4 in. SS-SS43 mm SS-SS3MM6 mm SS-SS6MM1/4 in.SS-SVR4Dimensions, in. (mm)A B D E G NS series straight pattern1.56 (39.6)2.34 (59.4)1.90 (48.3)2.04 (51.8)1.90 (48.3)2.04 (51.8)2.06 (52.3)S series angle pattern1/16 in. SS-SS1-A 3.22 (81.8) 0.81 (20.6) 0.88 (22.4)Swageloktube fittings1/8 in.1/4 in.SS-SS2-ASS-SS4-A3.32 (84.3)3.36 (85.3)0.98 (24.9)1.02 (25.9)3 mm SS-SS3MM-A 3.32 (84.3) 0.98 (24.9) 0.99 (25.1)Male NPT/Swagelok 1/8 in. SS-SM2-S2-A 3.07 (78.0) 0.98 (24.9)tube fittingM series straight pattern1/8 in. SS-2MG2.02 (51.3)Swagelok 1/4 in. SS-4MG2.20 (55.9)tube fittings 3 mm SS-3MG-MM2.02 (51.3)6 mm SS-6MG-MM2.20 (55.9)Male NPT1/8 in. SS-2MG2 2.78 (70.6) 1.50 (38.1) —1/4 in. SS-4MG21.96 (49.8)Female NPT 1/8 in. SS-2MG4 1.94 (49.3)Male VCRfittings1/4 in. SS-MGVR4 2.06 (52.3)M series angle pattern1/8 in. SS-2MA 3.30 (83.8) 1.01 (25.7)Swagelok 1/4 in. SS-4MA 3.39 (86.1) 1.10 (27.9)tube fittings 3 mm SS-3MA-MM 3.30 (83.8) 1.01 (25.7)6 mm SS-6MA-MM 3.39 (86.1) 1.10 (27.9)Male NPT1/8 in. SS-2MA2 3.04 (77.2) 0.75 (19.1)1/4 in. SS-4MA2 3.27 (83.1) 0.98 (24.9) 1.02 (25.9)Male NPT/to Swagelok 1/8 in. SS-2MA1 3.04 (77.2) 1.01 (25.7) 0.75 (19.1)tube fittingFemale NPT 1/8 in. SS-2MA4 3.26 (82.8) 0.97 (24.6)L series straight pattern1/4 in. SS-4L2.34 (59.4)Swagelok3/8 in. SS-6L2.46 (62.5)tube fittings2.82 (71.6)—6 mm SS-6L-MM2.34 (59.4)Male NPT 1/4 in. SS-4L22.00 (50.8)L series angle patternSwagelok 1/4 in. SS-4LAtube fittings 6 mm SS-6LA-MM3.77 (95.8) 1.17 (29.7)—0.38(9.6)0.38(9.6)0.50(12.7)0.50(12.7)1.13(28.7)1.13(28.7)0.45(11.4)0.45(11.4)0.58(14.7)0.58(14.7)0.58(14.7)0.58(14.7)0.92(23.4)0.92(23.4)1.56(39.6)1.07(27.2)1.26(32.0)1.04(26.4)SWAGELOKB2End ConnectionsTypeSizeOrderingNumberDimensions, in. (mm)A B B1 B2 C D H31 series0.38(9.6)SWAGELOKB1CSwageloktube fittingFemaleNPT1/4 in. SS-31RS46 mm SS-31RS6MM1/8 in.1/4 in.SS-31RF2SS-31RF42.40(61.0)2.00(50.8)2.06(52.3)1.20(30.5)1.00(25.4)1.03(26.2)1.16(29.5)0.91(23.1)1.48(37.6)1.00(25.4)1.54(39.1)1.09(27.7)1.28 (32.5)3.60(91.4)3.80(96.5)Dimensions shown with Swagelok tube fitting nuts finger-tight.

6 Metering ValvesOptions and AccessoriesCross PatternS and M Series■ Fluid flows between side ports aroundstem in any stem position.■ Flow through branch port can bemetered in both directions.GpanelholeENASWAGELOKS series valve shown.Double PatternS and M Series■ Inlet valve handle can be set andlocked at desired maximum flow.■ Outlet valve handle can be used forfine flow control up to the presetmaximum of the inlet valve.NASWAGELOKSWAGELOKSWAGELOKDBGpanelholeESWAGELOKM series valve shown.BOrdering Information and DimensionsSelect an ordering number. For brass valves, replace SS with B.Example: B-SS2-XDimensions are for reference only and are subject to change.ValvePatternCrossDoubleCrossDoubleEnd ConnectionsOrderingType Size C v NumberSwageloktube fittingSwageloktube fitting1/8 in.1/8 in.1/4 in.1/4 in.0.0040.0010.030.026Dimensions shown with Swagelok tube fitting nuts finger-tight.SS-SS2-XSS-SS2-DSS-4MXSS-4MGDDimensions, in. (mm)A B D E G NS series3.32 (84.3) 1.96 (49.8) 0.98 (24.9)2.34 (59.4) 1.90 (48.3) —0.38 (9.6) 0.45 (11.4) 0.92 (23.4)M series3.39 (86.1) 1.10 (27.9)1.07 (27.2)0.50 (12.7) 0.58 (14.7)2.78 (70.6) 2.20 (55.9) —1.56 (39.6)

Stem O-Ring MaterialsS, M, and L SeriesBuna N O-rings are standard for brass valves; fluorocarbonFKM O-rings are standard for stainless steel valves.For an optional stem O-ring, add the desired O-ring materialdesignator to the ordering number.Example: SS-SS1-BUSC-11 Cleaning and PackagingAll SeriesTo order special cleaning and packaging in accordance withSpecification SC-11, if it is not standard, add -SC11 to thevalve ordering number.Example: SS-SS1-SC11O-ring MaterialBuna NEthylene propyleneDesignator-BU-EPTemperature Rating,°F (°C)–10 to 300 (–23 to 149)Fluorocarbon FKM -VI –10 to 400 (–23 to 204)Kalrez ® -KZ 0 to 300 (–18 to 149)Neoprene -NE –10 to 250 (–23 to 121)High-Temperature Stem Packing Material31 SeriesGrafoil packing extends the temperature rating to 850°F(454°C) and requires fluorinated tungsten disulfide-basedlubricant. To order, add -G to the ordering number.Example: SS-31RS4-GStem Packing KitsPTFE and Grafoil packing kits are available. Kits includepacking, lubricant, and instructions. Select a kit orderingnumber.Stem Packing Material and Kit Ordering NumberPTFET-9K-2Lubricant: nickel antiseize,hydrocarbon carrierGrafoilG-9K-2Lubricant: fluorinatedtungsten disulfide based Packing adjustment may be required during thevalve’s service life.Safe Product SelectionWhen selecting a product, the total system design mustbe considered to ensure safe, trouble-free performance.Function, material compatibility, adequate ratings,proper installation, operation, and maintenance are theresponsibilities of the system designer and user.Caution: Do not mix or interchange parts with those ofother manufacturers.Swagelok, VCR—TM Swagelok CompanyGrafoil—TM UCAR Carbon Company Inc.Kalrez—TM DuPont© 2002 Swagelok CompanyPrinted in U.S.A., MIAugust 2002, R3MS-01-142