The BS&B BPAV set pressure is controlled by a precision buckling pin that is calibrated to respond to the forces generated by inlet pressure acting on the valve plug. When the pin activates, the valve plug lifts to achieve a full diameter flow area. The BPAV has a soft seat. Standard valve materials are carbon steel and stainless steel for process contact components. Special materials are available upon request.

  • 1 x 1.5 inches (25 x 40mm) to 8 x 10 inches (200 x 250mm); larger sizes available upon request
  • Full bore relief for maximum flow capacity; 0.8 coefficient of discharge/Kd = 0.8 for gas, Kd = 0.686 for liquid
  • Fast acting
  • Set pressure independent of back pressure, suitable for variable back pressure applications
  • Operable to 90% of set pressure – no simmering
  • Suitable for gas, liquid and two-phase flow
  • Higher flow capacity than equivalent sized relief valve
  • ANSI/ASME – EN/DIN – JIS and GOST flange compatibility
  • ASME “UD” stamped, Section VIII, Division I
  • Pressure Equipment Directive “CE” marked

Additional materials

Buckling Pin Relief Valve CatalogDownload
By BS&B, Buckling Pin Relief Valves