 Severe-Service Union-Bonnet Needle and Instrumentation Blowdown 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).
More Information
Download the Severe-Service Union-Bonnet Needle Valves—N Series and HN Series catalog.
Download the Instrumentation Blowdown Valves—6DB Series catalog.
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Severe-Service Union-Bonnet Needle Valves—N Series and HN Series
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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
- 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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Instrumentation Blowdown Valves—6DB Series
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Specifications
Working Pressure
Temperature
Flow Coefficient
Body Material
Packing Material
End Connections
• Type
• Size |
Up to 6000 psig (413 bar)
–65 to 1200°F (–53 to 648°C)
0.86
316 stainless steel
Grafoil
Swagelok tube fitting, female NPT,
tube socket weld, pipe socket weld
1/4, 3/8, 1/2 in.; 10 and 12 mm |
Testing
Every 6DB series blowdown 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
Every 6DB series blowdown valve is cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).
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