piston actuator valve / electric / pneumatic / hydraulic
Blakeborough® BV830/BV831 WEIR Oil & Gas



  • Type:

    piston actuator

  • Operation:

    electric, pneumatic, hydraulic

  • Function:

    flow control

  • Media:

    for water, for oil, for chemicals, for gas, for air

  • Body:

    stainless steel, carbon steel, Hastelloy®

  • Applications:


  • Other characteristics:

    standard, socket weld, 3-way

  • Temperature:

    Max.: 800 °C (1,472 °F)

    Min.: -196 °C (-321 °F)

  • Pressure:

    Max.: 250 bar (3,625.9 psi)

    Min.: 10 bar (145 psi)

  • DN:

    Max.: 400 mm

    Min.: 40 mm


Overview Key features/benefits Top and skirt guided Wide range of trim sizes High capacity High stability Balanced Optional design features: Soft seating for class VI shut off, Downstream silencer for noise reduction End Connections: Flanged, Butt weld (optional), Socket weld (optional), Screwed (optional) Bonnet forms: Standard – standard range of temperatures, Normalising – protection of gland packing for temperatures beyond standard, Bellows Seal – high leak protection system, Cryogenic – for extremely low temperatures to prevent packing freezing Actuators: Pneumatic single spring diaphragm; Pneumatic multi-spring diaphragm, Pneumatic double acting piston actuator, Self-contained electro-hydraulic, Hydraulic (separate HPU and controls unit), Electric