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The J48 is an industrial low pressure regulator with an optional vent limiter. It is suitable for a wide range of pressure reduction applications, including such OEM equipment as boiler and burner trains for a variety of gases.

Outlet pressures from 2″ W.C. up to 64″ W.C. Operating temperature range is -4°F to +158°F (-20°C to + 70°C) with a maximum allowable inlet pressure of 5 PSIG (350mbar). Flow rates up to 28040 SCFH (800 SCMH).

The J48 is AGA / CGA approved to the following specifications: CGA 6.3 – M95 / ANSI Z21.18 – 1995 CGA 6.3a – M98 / ANSI Z21.18a – 1998 CGA 6.3b – M100 / ANSI Z21.18b – 2000


  • Quick release spring adjustment mechanism unit that provides easy access for spring adjustment and routine maintenance
  • Available in a number of valve body connection sizes- 3/4″, 1″, 1-1/4″, 2″, 2-1/2″, and 3″.  All have NPT screw bodies
  • Comprehensive range of regulator spring ranges for different requirements.

Add a Vent Limiter (P/N: 78069P013):

A vent restrictor is available which fits into the regulator vent. In the event of a major malfunction it will limit the amount of gas that can escape to the atmosphere. The restrictor is built and tested to comply with ANSI Z21.18 1995.