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Home > Products > Valves > Needle Shutoff and Regulating > Severe Service Union Bonnet Needle Valves
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Severe Service Union Bonnet Needle Valves

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Severe-Service Union-Bonnet Needle Valves—N Series and HN Series

N Series and HN Series Severe Service Union Bonnet Needle Valves

Swagelok® needle valves with union-bonnet construction are available in a variety of materials, with working pressures up to 10 000 psig (689 bar) and temperatures up to 1200°F (648°C).


Specifications

Working Pressure
Temperature
Flow Coefficient
Body Material

Packing Material
End Connections
• Type


• Size
Up to 10 000 psig (689 bar)
–65 to 1200°F (–53 to 648°C)
Up to 2.4
316 stainless steel, alloy 400, alloy 20, alloy 600, alloy C-276, titanium
PTFE

Swagelok tube fitting, NPT, tube socket weld, pipe socket weld, male VCR® fitting, male VCO® fitting
1/8 to 1 in.; 6 to 12 mm

Features

Needle Valve Union Cutaway
  • Stem designs
    • Nonrotating ball (NB)
    • Regulating (NR)
    • PCTFE soft-seat regulating (NKR)
    • PTFE soft-seat regulating (NTR)
  • Orifice sizes 0.156 to 0.437 in. (4.0 to 11.1 mm)
  • Union-bonnet construction prevents accidental valve disassembly
  • Packing bolt design permits packing adjustment in the open position
  • Safety back searing seals in fully open position
  • Straight and angle flow patterns
  • Manual and pneumatic actuation

Testing

Every N series and HN series needle valve is factory tested with nitrogen at 1000 psig (69 bar). Seats have a maximum allowable leak rate of 0.1 std cm3/min. Shell testing is performed to a requirement of no detectable leakage with a liquid leak detector.



Cleaning and Packaging

All N series and HN series needle valves are cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10). 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


N Series

  • Pneumatic Actuators
    • Swagelok 3N and 6N series valves can be equipped with pneumatic actuators in normally closed, normally open, and double-acting models.
  • Ball Stem Tip Materials
    • Cobalt-based alloy is standard; 440C SS, alloy 400, alloy 20, alloy C-276, and titanium are available.
  • Handles
    • Anodized black aluminum bar handles are standard. Colored phenolic and 316 stainless steel bar handles are available.

N Series and HN Series

  • PTFE, UHMWPE, PEEK and Grafoil® stem packings are available factory assembled and in kits for field assembly.
  • Nonrotating ball. regulating, PCTFE soft-seat regulating, and PTFE soft-seat regulating stem designs are available.
  • N and HN series valves with female pipe ends are available for sour gas service. Materials are selected in accordance with NACE MR0175/ISO 15156.
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