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Products: Gas Pressure Regulators

Standby Systems, Inc. is a distributor for Bryan Donkin RMG of Canada. Since 1803, Bryan Donkin has been manufacturing pressure regulators, associated safety devices and related equipment for the gas distribution industry. The product line includes service regulators and components, some shown below, and system regulators including customized regulating stations. These regulators and relief valves are also recommended for propane vapor and manufactured gases. The product line is largely interchangeable to Fisher, Actaris, etc. and priced very competitively.
Contact us for application information and pricing.
Series 290 & 309 Slam Shut Valve Assembly
The series 290 & 309 Slam Shut Valve Assemblies are specifically designed to protect downstream equipment from either under or over pressure conditions. The series 290 is an over pressure protection model. The series 309 is available in over pressure protection or under/over pressure protection models. 309LP2 and 309LP4 versions are suited for higher inlet pressures and are ideal for propane vaporizer discharge applications. The safety slam shut valve will remain closed until it is manually reset. No tools are required to reset the valve.
Series 290 & 309 Slam Shut Valve Assembly
Specification Sheet (PDF)
  • ½" to 2" Threaded & 2" flanged inlet & outlet connections
  • Internal or external control line versions available
  • Thermal protection version available (close on temperature rise)
    • 290 & 309LP:
      • Max inlet pressure — 150 psig
      • Under pressure cut off range 4" w.c. - 60" w.c.
      • Over pressure cut off range 14" w.c. - 8 psig
    • 309LP2 & LP4:
      • Max inlet pressure — 275 psig
      • Under pressure cut off range 8" w.c. - 8 psig
      • Over pressure cut off range:
        • LP2 - 3-20 psig
        • LP4 - 15-60 psig


Type 200 Regulator / 201 Relief Valve
The Series 200 Regulators are high pressure, first-stage regulators ideally designed for multi-stage pressure reduction applications, active/monitor configurations and as a by-pass regulator for pressure reducing stations.
The Series 201 Relief Valve is a dependable, high pressure relief valve utilized to protect downstream equipment from over pressure conditions. This relief valve has a wide inlet pressure range and relief set point range. A great solution in most relief safety applications. The Series 201 is standard with an in-line body design.
Type 200R
Specification Sheet (PDF)
  • Compares to Fisher type 627R
  • ¾" or 1" inlet & outlet connections
  • ½" tapped vent connection
  • Inlet pressure range - regulator 0-1000 psig
  • Outlet pressure range- regulator 3-150 psig
  • Can be used as stand alone relief valve:
    • Inlet pressure range - 0-375 psig
    • Outlet relief range - 3-150 psig
    • Maximum operating pressure - 375 psig


Type 225 Relief Valve
This low pressure relief valve is utilized to protect downstream equipment from over pressure conditions. The 225 Relief Valve has a wide relief set point range to be a great solution in most relief safety applications. The Series 225 is standard with an angle body design.
Type 225RV
Specification Sheet (PDF)
  • Compares to Fisher type 289 series
  • ¾" or 1" inlet & outlet connections
  • Max inlet pressure - 30 psig for LP & LP2 Series
  • Max inlet pressure - 150 psig for LP4 series
  • Pressure relief ranges: 12" w.c. - 5 psig for LP series
    • 5-15 psig for LP2 series
    • 5-75 psig for LP4 series


Type 240R
The Series 240 Regulator is a high pressure regulator ideally designed for domestic, commercial and light industrial installations.
Type 240R
Specification Sheet (PDF)
  • Compares to Fisher type S302
  • ¾" to 1 ½" threaded inlet & outlet connections
  • Inlet pressure range to 125 psig
  • Outlet pressure range 4" w.c. - 3 psig
  • Available with or without internal relief capacity
  • Available with integral safety slam shut devices for high and low gas pressure protection
  • Thermal protection version available (close on temperature rise)


Type 241 Regulator
The Series 241 Regulator is a high pressure regulator ideally designed for domestic installations but is commonly utilized in commercial and light industrial applications.
Type 241
Specification Sheet (PDF)
  • Compares to Fisher type S402
  • ½", ¾" or 1 ½" threaded inlet & outlet connections
  • Inlet pressure range 0-150 psig
  • Outlet pressure range 4" w.c. - 5 psig
  • Spring loaded, direct acting, diaphragm operated
  • Internal relief capacity available
  • Available with integral safety slam shut devices for high and low gas pressure protection (shown)
  • Thermal protection version available (close on temperature rise)


Type 274 Regulator
The Series 274 Regulators are large volume high pressure regulators. Ideally designed for commercial and industrial applications. Compares to Fisher S200 Series, Actaris B34 & B38 Series & invensys 243 Series regulators.
Type 274
Specification Sheet (PDF)
  • 1¼", 1½" and 2" threaded connections & 2" flanged connections
  • Inlet pressure range 0-125 psig
  • Max inlet pressure 150 psig depending on orifice size
  • Outlet pressure range 6" w.c. - 6 psig
  • Available with integral safety slam shut devices for high and low gas pressure protection (shown)
  • Thermal protection version available (close on temperature rise)


Type 240PL Regulator
The Series 240PL Regulators are pilot-loaded for superior accuracy and control of the outlet pressure. Ideally designed for multi-installations, commercial and industrial applications.
Type 240PL
Specification Sheet (PDF)
  • Compares to Fisher type 299 pilot loaded
  • 1¼", 1½" and 2" threaded connections & 2" flanged connections
  • Inlet pressure range 5-280 psig , 5-150 psig with incorporated Slam Shut Valve (SSV)
  • Outlet pressure range 2-60 psig
  • Pilot-loaded for superior accuracy and control
  • Available with integral safety slam shut devices for high and low gas pressure protection (shown)
  • Thermal protection version available (close on temperature rise)


Type 2473 PL Regulator
The Series 2473 PL Regulators are pilot-loaded for superior accuracy and control of the outlet pressure. Ideally designed for multi-installations, commercial and industrial applications.
Type 2473PL
Specification Sheet (PDF)
  • Compares to Fisher type 299 pilot loaded
  • 1¼", 1½" and 2" threaded connections & 2" flanged connections
  • Inlet pressure range 5-220 psig , 5-150 psig with incorporated Slam Shut Valve (SSV)
  • Outlet pressure range 2-60 psig
  • Pilot-loaded for superior accuracy and control
  • Available with integral safety slam shut devices for high and low gas pressure protection (shown)
  • Thermal protection version available (close on temperature rise)


Type 273 PL Regulator
The Series 273 PL Regulators are pilot-loaded for superior accuracy and control of the outlet pressure. Ideally designed for multi-installations, commercial and industrial applications.
Type 273
Specification Sheet (PDF)
  • Compares to Fisher type 299 pilot loaded
  • 1¼", 1½" and 2" threaded connections & 2" flanged connections
  • Inlet pressure range 5-280 psig , 5-150 psig with incorporated Slam Shut Valve (SSV)
  • Outlet pressure range 2-60 psig
  • Pilot-loaded for superior accuracy and control
  • Available with integral safety slam shut devices for high and low gas pressure protection (shown)
  • Thermal protection version available (close on temperature rise)


Type 270-3 PL Regulator
The Series 270-3 PL Regulators are pilot-loaded for superior accuracy and control of the outlet pressure. Ideally designed for multi-installations, commercial and industrial applications.
Type 270-3PL
Specification Sheet (PDF)
  • Compares to Fisher type 299 pilot loaded
  • 1¼", 1½" and 2" threaded connections & 2" flanged connections
  • Inlet pressure range 5-280 psig
  • Outlet pressure range 2-60 psig
  • Pilot-loaded for superior accuracy and control
  • Available with integral safety slam shut devices for high and low gas pressure protection (shown)
  • Thermal protection version available (close on temperature rise)