Product description

Excess flow valves are normally open and allow bi-directional flow with the shut-off functionality only being actuated in one direction. If flow velocity exceeds the expected rate and thereby the spring tension, the valve will shut off until pressure has been close to equalised. A bleed-off orifice assists in reaching full pressure equalisation and re-opening of the valve.

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Material

Body: Carbon steel, stainless steel
Guide: Carbon steel, stainless steel
Spring: Stainless steel
Poppet: Stainless steel

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Specifications

Gas types: LPG (Propane, Butane), NH3 (Ammonia, Anhydrous Ammonia)
Connections: Flange
Types: ANSI
Working pressure: Up to 50 bar (720 psi)
Max. pressure: 193 bar (2800 psi)
Temperature range: -45˚C to +148˚C (-50˚F to +300˚F)
Closing flow rate (LP): 21.5 to 9478.6 lpm (5.7 to 2504 gpm)
Sizes and ranges: 1" to 12" 
Series available: Model 166, 217, 189, 244, High flow 514
Standards: UL listed, CE-PED

*Materials and specifications are subject to generalisation. Our experienced people are ready to help you find the correct fit for your application. 

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Features

  • Available in carbon steel or stainless steel
  • Wafer Type is designed to fit inside Schedule 160, 80 or less steel pipe
  • Wafer type: Fits inside the bolts of 150 or 300-pound American Standard steel pipe flanges
  • Flanged type is designed to fit between 150 or 300 or 600-pound American Standard steel pipe flanges
  • Flanged type. Ring groove flanges can be furnished if required
  • Generous flow channels provide minimal pressure drops

Did you know?

Wafer type excess flow valves are installed between two flanges with stud bolts and it's mostly used to reduce the utilised space on tank nozzles and pipelines

  • Photos of Threaded Excess Flow Valves

    Excess flow valves (threaded)

    A threaded excess flow valve is a bi-directional valve that shuts off flow in one direction if it exceeds a predetermined value. Its bleed-off feature assists in pressure equalisation.

    See our Threaded excess flow valves

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