JRLL Series

The Lowflow JRLL Series are low flow regulators designed and built specifically for very low pressure applications.

The durable valve body and metal trim components are machined from 316L SST barstock. The valve is outfitted with a sensitive PTFE Jorlon diaphragm for accurate low pressure sensing and Teflon, PEEK, Kel-F and EPDM seats for ANSI class VI shutoff.


  • Stable outlet pressure set points at very low pressure
  • Very low set point offset (droop) especially at higher inlet pressures
  • Top entry design facilitates in-line cleaning and maintenance
  • Barstock construction guarantees a valve that will fit your specific application
  • Optimized internal volume
  • Proprietary Jorlon diaphragm material provides exceptionally long life
  • Soft seat material for ANSI Class VI shutoff


  • 1/4”, 3/8” & 1/2”

End Connections      

  • NPT, contact factory for other options

Diaphragm Material

  • Jorlon – PTFE™

Spring Ranges

  • 1-75 (0,07-5,2); 25-100 (1,7-6,9) psi (bar)

Body and Trim Material

  • 316L SST – Standard
  • Contact factory for other body/trim materials