Rack-and-pinion units. Confirm air supply and fail action first.
Rack-and-pinion quarter-turn unit for ball and butterfly valves, 0.4–0.6 MPa air.
Torque9–4000 N·m @ 0.6 MPa
Fail-safe open or close when air is lost. Used on emergency isolation.
Torque9–2500 N·m end of spring
