Nupro JN 1/4 Brass Metering Valve 1/4 Compression Flow Control Swagelok

Nupro JN 1/4 Brass Metering Valve 1/4 Compression Flow Control Swagelok

The Nupro JN is a 1/4" brass metering valve designed for precise manual flow control of gases and liquids in instrumentation and laboratory plumbing systems. It features 1/4" compression end connections and a knurled knob handle for fine adjustment between open and closed positions. Nupro Company, based in Willoughby, Ohio, is a well-known manufacturer of instrumentation valves and was acquired by Swagelok — buyers searching under either name will find this type of valve.

Specifications & What's Included

• Model: JN (Nupro Company, Willoughby, Ohio)
• Body material: Brass
• Valve type: Metering / flow control
• End connection type: Compression
• Connection size: 1/4 inch (both ports)
• Actuator: Black knurled knob with open/closed indicator label
• Port configuration: Two-port (inline or angled body)
• Brand family: Nupro / Swagelok

Applications

Nupro metering valves are standard components in laboratory gas distribution systems, analytical instrumentation, vacuum systems, and process control lines. The JN series is used wherever a compact, precise manual flow-adjustment valve is needed in a 1/4" compression tubing circuit — common in gas chromatography support lines, purge and vent systems, and bench-scale chemical process setups. Because Nupro became part of Swagelok, these valves are fully compatible with standard Swagelok-style compression fittings and tubing. They remain in active everyday use in labs, semiconductor fabs, and industrial instrumentation environments.