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Home > Screwed-Bonnet Needle Valves
Needle valves, JB and JN series Screwed-Bonnet Needle Valves
Swagelok® screwed-bonnet needle valves offer shutoff or regulating stem tips in straight- or angle-pattern valves with externally adjustable packing.

More Information
Download the Screwed-Bonnet Needle Valves—JB Series catalog.
Download the Screwed-Bonnet Needle Valves—JN Series catalog.
Find screwed-bonnet needle valves, stainless steel in the product search.
Find screwed-bonnet needle valves, brass in the product search.


Stainless Steel JB Series Screwed-Bonnet Needle Valves

Stainless steel JB series valve

Specifications
Working Pressure
Temperature
Flow Coefficient
Body Material
Packing Material
End Connections
• Type
• Size


Up to 3000 psig (206 bar)
–40 to 600°F (–40 to 315°C)
Up to 0.58
316 stainless steel
PTFE or Grafoil®

Swagelok tube fitting, NPT, male ISO
1/8 to 3/8 in.; 6 and 8 mm

Features
  • Stem threads isolated from system fluid
  • Externally adjustable PTFE packing
  • Metal-to-metal shutoff

    Testing
    Every JB series needle valve is factory tested for bubble-tight shutoff at 100 psi (6.8 bar) differential pressure. Shell testing is performed on a sampling basis at 3000 psig (206 bar) to a requirement of no detectable leakage.

    Cleaning and Packaging
    Every JB series needle valve is cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).

    Options
    Standard ball stem tip is 316 stainless steel; 440C stainless steel and cobalt-based alloy material are available.
    Nonrotating ball shutoff stem is standard; regulating stem is available.
    Standard handle is anodized aluminum; stainless steel bar handles are available.

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    Brass JN Series Screwed-Bonnet Needle Valves

    Brass JN series screwed-bonnet needle valve Specifications
    Working Pressure
    Temperature
    Flow Coefficient
    Body Material
    Packing Material
    End Connections
    • Type
    • Size
    Up to 600 psig (41.3 bar)
    –40 to 300°F (–40 to 148°C)
    Up to 0.43
    Brass
    Virgin PTFE

    Swagelok tube fitting, NPT, ISO
    1/8 to 3/8 in.; 6 mm

    Features
    • Stem threads isolated from system fluid
    • Externally adjustable PTFE packing
    • PTFE-coated stem tip for repetitive shutoff
    • Bonnet lock nut

      Testing
      Every JN series needle valve is factory tested with nitrogen at 100 psig (6.8 bar). Seats have a maximum allowable leak rate of 0.1 std cm 3 /min. Shell testing is performed with nitrogen at 100 psig (6.8 bar) on a sampling basis to a requirement of no detectable leakage with a liquid leak detector.

      Cleaning and Packaging
      Every JB series needle valve is cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).

      Options
      Vee shutoff stem is standard; regulating stem is available.
      Green phenolic handle is standard; black, blue, red, and yellow are available.
      Panel mounting is available.

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