Metering Valves: S, M, L, and 31 Series
Metering Valves: S, M, L, and 31 Series
Metering Valves: S, M, L, and 31 Series
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2 <strong>Metering</strong> <strong>Valves</strong>FeaturesLow-Pressure <strong>Valves</strong> (S, M, <strong>and</strong> L <strong>Series</strong>)■ Straight-pattern flow coefficients (C v ) from 0.004 to 0.15■ Forged-body <strong>31</strong>6 SS or brass construction■ Straight, angle, cross, <strong>and</strong> double patterns■ Panel mounting■ Knurled, round, vernier, slotted, <strong>and</strong> adjustable-torqueh<strong>and</strong>les■ Swagelok ® tube fitting, male NPT, <strong>and</strong> integral VCR ® fittingend connectionsTechnical Data<strong>Series</strong>SMLPressure-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 <strong>and</strong>slotted h<strong>and</strong>les)Tapered stem tipaccurately controls gas<strong>and</strong> liquid flow ratesS, M, <strong>and</strong> L <strong>Series</strong>S series valve shown.Stem threadsare isolated fromsystem fluidH<strong>and</strong>le dead-stophelps preventdamage to stem<strong>and</strong> 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 <strong>and</strong>high operating torque.High-Pressure <strong>Valves</strong> (<strong>31</strong> <strong>Series</strong>)■ Flow coefficient of 0.04; orifice of 0.062 in. (1.6 mm)■ <strong>31</strong>6 SS bar stock body■ Straight <strong>and</strong> angle patterns■ Metal-to-metal shutoff■ 2° stem taper (included angle)■ Panel mounting■ Round phenolic h<strong>and</strong>le■ Swagelok tube fitting <strong>and</strong> female NPT end connectionsPressure-Temperature Ratings ➀ASME Class 2080Material Group 2.2Material Name<strong>31</strong>6 SSPacking nutpermits simpleexternaladjustment440C SSregulating stemhardened forenhancedservice lifePacking fullycontained by<strong>31</strong>6 SS gl<strong>and</strong>s 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 (<strong>31</strong>5)650 (343)700 (371)750 (398)800 (426)850 (454)5000 (344)4295 (295)3875 (266)3560 (245)3435 (236)3<strong>31</strong>0 (228)<strong>31</strong>30 (215)3080 (212)3000 (206)2930 (201)2880 (198)2815 (193)<strong>31</strong> <strong>Series</strong>Tapered stem tipaccurately controlsgas <strong>and</strong> liquid flowratesFor more information about ASME classes, material groups, <strong>and</strong> 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 st<strong>and</strong>ard PTFE packing.
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