Staflux 187


Staflux 187 is a direct-operated pressure regulator controlled by a diaphragm and contrasting regulated counter pressure action.

It can be used with previously filtered non-corrosive gases and is particularly suitable for high-pressure transmission systems and for medium pressure natural gas distribution networks.

According to the European Standard EN 334, it is classified as Fail Open.


  • Accuracy class AC: up to 5 (depending on working conditions)
  • Nominal sizes DN: 1″
  • Lock-up pressure class SG: up to 10 (depending on working conditions)
  • Design pressure: up to 250 bar
  • Design temperature: from -20 °C to +60 °C
  • Connections: class 1500 RF or RTJ according to ASME B16.5
  • Range of downstream pressure Wd: from 1 to 75 bar
  • Inlet pressure range bpu: from 2 to 250 bar
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