JR Series Gas Pressure Reducing Valve

The LowFlow JR Series lines of high pressure regulators have the ability to handle very high pressures and very low flows. These valves are typically used in research and sampling systems for general, corrosive and speciality gas and liquid service. Typical applications include gas chromatography and flame ionization detectors, as well as other industrial controls.

The capture vent design is for maximum safety for the user when handling toxic or hazardous media. It features a 1/8” FNPT port located on the spring housing. The user can easily tube this vent to a safe location. This option can be incorporated into a self-relieving regulator that provides an additional port to permit the safe expulsion of hazardous media.

The self relieving option is used for internal venting of downstream pressure. From a practical standpoint, it allows for immediate reduction in pressure setpoints and automatically alleviates regulator lock up.


  • 1/4″, 3/8”, 1/2”

End Connections

  • SWE
  • NPT

Diaphragm Material

  • Jorlon

Spring Ranges

  • 5-50 (0,3-3,4); 25-100 (1,7-6,9); 50-150 (3,4-10,3); 75-250 (5,2-17); 100-475 (7-33); 200-750 (14-52) psi (bar).

Soft Seat Materials for ANSI Class VI Shut-off

  • PTFE to + 150ºF(66ºC)
  • PEEK to + 350ºF(+177ºC)