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Pneumatic Stainless Steel (BI-SS)

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Actuator Type
BI TORQ BI SS Actuator
BI TORQ BI SS Actuator


BI-TORQ Valve Automation's Pneumatic Actuators are compact and reliable actuators in rack and pinion design for consistent torque output. The BI-Series actuator is housed in corrosion resistent stainless steel, ideal for environments where sanitary requirements are necessary and where objects corrode in damp conditions. Pulp and paper, marine, and dairy are ideal markets plus many others. The series has an anti-blowout system that prevents damage from over pressurization. Durable, precision cast pistons provide full engagement with the pinion. The one-piece alloy shaft has machine gear teeth for precision operations. Heavy-duty spring cartridges allow for easy conversion of a double acting actuator to a spring return actuator, or to modify the torque output depending on air pressure. A slotted shaft, along with the Namur bolt pattern, allows for direct mounting of Namur standard switches and positioners.

Our actuators are also available as part of a complete automated valve package or as a retrofit to existing valves in the field with our customized mounting hardware. Available in double acting or spring return. Pnuematic Actuator in Aluminum housing is also available.

Features and Options

  • 304 Stainless Steel housing is ideal for harsh environments where corrosion resistance is crucial
  • Standard air supply pressure is 80 psi; Maximum pressure rating 120 PSI / 8 BAR
  • ISO 5211 bottom mounting for direct mount actuation with true ISO valves
  • ISO and NAMUR standards for top mounting for adding limit switches and positioners on select units
  • Star pinion output design for greater flexibility in actuator to valve mounting
  • NAMUR air port configuration for easy solenoid mounting
  • Double Acting (DA) and Spring Return (SR) options
  • Standard seal is NBR, but Viton seals are optional upon request. Contact Us for pricing.
  • Fail open or fail close configurations
  • ±4 degree travel adjustment in both open/closed positions
  • Cartridge style spring sets
  • Limit switches, modulating positioners, NAMUR solenoids and many other custom options available (BI-45 is too small for accessory options)
  • Ideal for use with BI-TORQ®'s sanitary or stainless steel ball valves