JRH Series

The LowFlow JRH Series of high pressure regulators have the ability to handle very high pressures as well as 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.


  • Top entry design facilitates in-line cleaning and maintenance
  • Barstock construction guarantees material integrity and surface finish
  • High flow rate coupled with high rangebility reduces need for reduced trim sizes
  • Optimized internal volume
  • Proprietary Jorlon diaphragm material provides exceptionally long life
  • Kel-F soft seat material for ANSI Class VI shutoff


  • 3/8” & 1/2”

End Connections

  • Threaded
  • Socket Weld
  • Flanged

Diaphragm Material

  • Jorlon

Spring Ranges

  • 2-10 (0,14-0,69); 5-20 (0,34-1,4); 15-100 (1,0-6,9); 50-175 (3,5-12,1); 75-450 (5,2-31) psi (bar).

Soft Seat Materials for ANSI Class VI Shut-off

  • KEL-F with Viton O-ring to +250°F (+120°C)