Birkett Safeset Series Pilot Operated Safety Relief Valves

Pop action and modulating pilot operated safety valves with a unique full nozzle design and dimensions to API 526

Features

Unique full nozzle design reduces seat stresses, inlet pressure losses, increases discharge co-efficient and enables lower specification body materials on corrosive duties.
All process wetted parts in stainless steel as a minimum, reducing seal contaminations and prolonging service life.
Non-flowing pilot eliminates freezing risk, improves service life and ensures trouble-free operation.
System pressures of 95% to 98% of set pressure possible.
Full lift capability against high levels of back pressure.
Pop action pilots adjustable for zero overpressure and blowdown equal to 3% of set pressure.
Soft pilot and main valve seats in a range of material options provide optimum leak tightness and reduce maintenance.
Adjustable orifice areas within 8 standard body sizes accommodating all 21 standard orifice sizes.
Integral sensing gives a compact design and accurate pressure sense from within the flow stream.
Remote pilot sensing option ensures trouble free operation even with high inlet pressure losses.
Dual outlet, full bore model available for high capacity duties.