D Series Nonrotating-Stem Needle Valves
Swagelok® offers compact needle valves in a full range of sizes, configurations, and materials for a variety of applications.
SpecificationsWorking Pressure
Temperature
Flow Coefficient
Body Material
O-Ring Material
End Connections
• Type
• Size |
Up to 3000 psig (206 bar)
–20 to 450°F (–28 to 232°C)
Up to 0.53
316 stainless steel, brass, alloy 400
Fluorocarbon FKM
Swagelok tube fitting, NPT
1/8 to 3/8 in.; 6 mm |
Features
- Nonrotating stem provides repetitive shutoff
- Safety back seating seals in fully open position
- Positive stem retraction promotes consistent flow control
- Actuation threads isolated from system fluid enhance thread life
- O-ring stem seal needs no adjustment
- Replaceable stem tip facilitates maintenance
- Protective handle prevents contaminants from entering functional valve parts
Testing
Every Swagelok nonrotating-stem 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
Every Swagelok nonrotating-stem needle valve is cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).
Options
O-Ring Stem SealsO-ring stem seals of Buna C, Buna N, ethylene propylene, fluorocarbon FKM, Kalrez®, and silicone are available factory assembled and in kits for field assembly.
Stem TipsPCTFE stem tip is standard; PEEK material is available factory assembled or in kits for field assembly.
HandlesBlack aluminum knob handles are standard; blue, green, orange, red, and yellow handles are available factory assembled or in kits for field assembly.
Valves with Rupture Discs
Certain 16D series valves can be configured as valves with rupture discs.
Outage TubesCertain 14D and 16D series valves can be configured as valves with outage tubes.