AC-R - Gas Pressure Regulator Accessories

The Cata-Dyne™ line of Gas Pressure Regulators are designed to provide precise control of gas or propane flow, and are part of the piping system connected to the Cata-Dyne™ heaters. There are three types of regulators available, suitable for different applications. The Appliance Regulator controls the manifold pressure on Cata-Dyne™ heaters fuelled by natural gas. The Service or Low Pressure Regulator works with all Cata-Dyne™ heater models operating on LPG or natural gas. It serves as a natural gas low pressure line regulator when used in conjunction with the gas appliance regulator. The High Pressure Regulator has a similar function to the Low Pressure, but features much higher maximum inlet and outlet pressures, and is installed upstream of any other regulators provided.


  • UL and/or CSA Approved
  • Three types of regulators are available: Appliance Regulators, Service or Low Pressure Regulators and High Pressure Regulators
  • Can be used for LPG or NG depending on regulator


Appliance Regulator:

vented spring-type, non-adjustable with maximum inlet pressure of ½ psi
available pressure outlet settings are 3.5", 4.5" or 7.0" W.C.
maximum flow capacity of 65,000 Btu/hr
5/16 - 24 UNF screwed vent connection provided
CSA approved

Service or Low Pressure Regulator:

vented self-operated, spring loaded device that is field-adjustable
maximum inlet pressure of 250 psig; factory set at 11 in W.C. outlet pressure
1/4" NPT inlet connection; 3/8" NPT outlet connection
maximum rating for propane of 140,000 Btu/hr (41 kW); maximum rating for natural gas of 70,000 Btu/hr (20.5 kW)
ambient temperature range of -40°C to 55°C (-40°F to 130°F) & [ -29°C to 82°C (-20°F to 100°F) Fisher ]
1/8" NPT screwed vent connection provided
UL (Fisher Only) and CSA products are available

High Pressure Regulator:

maximum inlet pressure of 6,000 psig; factory outlet pressure set at 50 psi
1/4" NPT connections (one inlet and two outlets)