Manufacturer: Biffi

Double acting gas-over-oil actuators for remote and local operation of valves in on-off and modulating heavy-duty service. Available with output torques up to 750,000 Nm.


GPO gas-over-oil actuators offer the major benefit of using the gas flowing in the pipeline for their operation, with no need for any other power source. They are ideal for pipeline applications in the most extreme environments.

Technical Specifications

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Technical Specification

  • Canted or symmetric scotch yoke design achieves high break torques for operating all kinds of quarter-turn valves.
  • Control system components engineered specifically to suit remote gas pipeline applications.
  • Control components are sealed within a dedicated enclosure, ensuring low maintenance.
  • Electronic control groups available to enable full valve network communication.
  • Electroless nickel plated and polished cylinder provides maximum corrosion resistance and reduces friction.
  • Integral manual handpump enables valve cycling when sufficient line pressure is not available.
  • Totally enclosed weatherproof carbon steel housing for maximum strength.
  • Environmentally-friendly design ensures up to 50% less gas discharge than alternative systems.
  • Gas over oil tanks separate the feeding gas from the hydraulic cylinder.

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