Swagelok® Metering Valves—S, M, L, and 31 Series
 Swagelok offers several metering valves for low- and high-pressure service in 316 stainless steel and brass materials with flow coefficients from 0.004 to 0.16.
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Low-Pressure Valves—S, M, and L Series
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Specifications
Working Pressure
Temperature
Body Material
Flow Coefficient
End Connections
• Type
• Size |
Up to 2000 psig (137 bar)
–10 to 400°F (–23 to 204°C)
316 stainless steel, brass
0.004 to 0.16
Swagelok tube fitting, NPT, integral
male VCR® face seal fitting
1/16, 1/8 and 1/4 in.; 3 and 6 mm |
Features
- Tapered stem tip accurately controls gas and liquid flow rates
- Straight, angle, cross, and double patterns
- Panel mounting
- Knurled, round, vernier, slotted, and adjustable-torque handles
Testing
Every Swagelok S, M, and L series metering valve is factory tested with nitrogen at 1000 psig (69 bar). Shell testing is performed to a requirement of no detectable leakage with a liquid leak detector.
Every Swagelok L series metering valve is tested for bubble-tight seat shutoff at 100 psig (6.8 bar) differential pressure.
Cleaning and Packaging
Swagelok S, M, and L series metering valves with VCR end connections are processed in accordance with Swagelok Special Cleaning and Packaging (SC-11), to ensure compliance with product cleanliness requirements stated in ASTM G93 Level C.
Swagelok S, M, and L series metering valves with other end connections are processed in accordance with Swagelok Standard Cleaning and Packaging (SC-10); special cleaning and packaging are available as an option.
Options
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S Series
Cross Pattern
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M Series
Double Pattern
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Cross Pattern (S and M Series)
- Fluid flows between side ports around stem in any stem position.
- Flow through branch port can be metered in both directions.
Double Pattern (S and M Series)
- Inlet valve handle can be set and locked at desired maximum flow.
- Outlet valve handle can be used for fine flow control up to the preset maximum of the inlet valve.
 Vernier Handle (S, M, and L Series)
- Helps ensure repeatable flow adjustments.
- Provides readings accurate to 1/25 turn.
 Adjustable-Torque Handle (S Series)
- Enhances control for setting flows.
- Features PTFE packing and two top-mounted torque adjustment screws.
- Is available in stainless steel material on stainless steel valves and in chrome-plated brass on brass valves.
 Slotted Handle (S and M Series)
- Allows flow setting adjustment with a screwdriver.
- Is for use in installations where handle is not easily accessible.
- Is available in stainless steel material on stainless steel valves and in chrome-plated brass on brass valves.
- Allows valve to be panel mounted without removing handle.
Stem O-Ring Materials (S, M, and L Series)
Buna N O-rings are standard for brass valves; fluorocarbon FKM O-rings are standard for stainless steel valves. Ethylene propylene, Kalrez®, and neoprene are available.
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High-Pressure Valves—31 Series
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Specifications
Working Pressure
Temperature
Body Material
Packing Material
Flow Coefficient
End Connections
• Type
• Size |
Up to 5000 psig (344 bar)
–65 to 850°F (–53 to 454°C)
316 stainless steel
PTFE, Grafoil®
0.04
Swagelok tube fitting, female NPT
1/8 and 1/4 in.; 6 mm |
Features
- Tapered stem tip accurately controls gas and liquid flow rates
- Straight and angle patterns
- Metal-to-metal shutoff
- 2° stem taper (included angle)
- Panel mounting
- Round phenolic handle
Testing
Every Swagelok 31 series metering valve is factory tested with nitrogen at 1000 psig (69 bar). Seats have a maximum allowable leak rate of 0.1 std cm3/min.
Cleaning and Packaging
Swagelok 31 series metering valves are processed in accordance with Swagelok Standard Cleaning and Packaging (SC-10); special cleaning and packaging in accordance with Swagelok Special Cleaning and Packaging (SC-11), to ensure compliance with product cleanliness requirements stated in ASTM G93 Level C, are available as an option.
Options
Colored Handles
Black phenolic handles are standard. Blue, green, orange, red, and yellow colors are available.
High-Temperature Stem Packing
Grafoil packing extends the temperature rating to 850°F (454°C).
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