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Pressure Slam Shuts

Bryan Donkin Slam Shut Valves are specifically designed to protect downstream equipment from either under or over pressure conditions. For instance, a slam shut can be used to mechanically isolate a gas system should the pressure exceed a given value (over pressure cut off or OPCO). A slam shut can also be used to mechanically shut off a gas system should the pressure fall below a given value which may happen if a gas line is severed (under pressure cut off or UPCO). In addition, slam shuts can be fitted with thermal links that will shut the valve in the case of a fire. Models 209 and 309 series are available incorporated with many of our pressure regulating valves as an option to enhance the regulators features, or independently mounted on its own body. Use with confidence with natural gas and all other non-corrosive gases.


Pressure Slam Shuts - Model 290 Model 290

Description :
The Model 290 is only available with over pressure cut-off (OPCO) protection.

Threaded Size : 1/2", 3/4", 1", 1-1/4", 1-1/2" & 2"
Pressure : Up to 375 PSIG
Flanged Sizes : 1" and 2"


   
   
Pressure Slam Shuts - Model  309LP

Model 309LP

Description : The Series 309 are available with over pressure cut-off (OPCO) or both under and over pressure cut-off protection (UPCO/OPCO).

Threaded Size : 1/2", 3/4", 1", 1-1/4", 1-1/2" & 2"
Pressure : Up to 150 PSIG
Flanged Sizes : 1" and 2"
  Download 390LP Product Configurator
   
Pressure Relief Valve - Model 309LP2

Model 309LP2

Description : The Series 309 are available with over pressure cut-off (OPCO) or both under and over pressure cut-off protection (UPCO/OPCO).

Threaded Size : 1/2", 3/4", 1", 1-1/4", 1-1/2" & 2"
Pressure : Up to 275 PSIG
Flanged Sizes : 1" and 2"
  Download 309LP2 Product Configurator
   
Pressure Relief Valve - Model 309LP4

Model 309LP4

Description : The Series 309 are available with over pressure cut-off (OPCO) or both under and over pressure cut-off protection (UPCO/OPCO).

Threaded Size : 1/2", 3/4", 1", 1-1/4", 1-1/2" & 2"
Pressure : Up to 275 PSIG
Flanged Sizes : 1" and 2"
  Download 309LP4 Product Configurator
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Pressure Relief Valve - Model 303

Model 303

Description : Designed to safeguard gas distribution systems, normally installed upstream of the regulator with the external control line piped to the downstream of the regulator, closing automatically in the event of an overpressure condition. Integral push-button type pressure equalizing valve, manual reset, UPCO low pressure loss, completely self-acting, no external power supply required.

Pressure : Up to 275 PSIG
Flanged Sizes : 6" to 12"
  Download PDF
   
   
Pressure Relief Valve - Model 304

Model 304

Description : Designed to safeguard gas distribution systems, normally installed upstream of the regulator closing automatically in the event of temporary interruption of the power supply to the solenoid. Accurate and dependable action, integral push-button type pressure, equalizing valve manual reset, UPCO low pressure loss, and flameproof.

Pressure : Up to 230 PSIG
Flanged Sizes : 2" to 8"
  Download PDF
   
   
Pressure Relief Valve - Model 305

Model 305

Description : Designed to safeguard gas distribution systems, normally installed upstream of the regulator with the external control line piped to the downstream of the regulator, closing automatically in the event of an overpressure condition. Fully enclosed color coded valve position indicator, integral push-button type pressure equalizing valve, manual reset, low pressure loss.

Pressure : Up to 230 PSIG
Flanged Sizes : 2" to 8"
  Download PDF
   
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