Rotary & linear actuators sized to torque, media and fail-safe duty.
A pneumatic rotary actuator is a quarter-turn drive that opens and closes a ball or butterfly valve using compressed air acting on a rack-and-pinion mechanism, mounted to the valve per the ISO 5211 flange standard.
We supply the full range - single-acting spring-return for fail-safe duty, double-acting for stay-put applications - sized to the actual torque, temperature and cycle-life requirement of the installation, with limit switches and solenoid valves fitted as a complete automated package.
Rack-and-pinion, dual-rack design for ball and butterfly valve automation - the actuator body used across our valve automation systems.
Spring-return: air to open, spring to close (or reverse) - fails to a defined safe position on air-supply loss.
Air to open, air to close - no spring, holds last position on air-supply loss ("stay put").
IllustrationRotary actuator fitted with a limit switch box for open/close position feedback to the control room.
IllustrationActuator pre-piped with a mounted solenoid valve - a ready-to-wire automated valve package.
ISO 5211 is the international standard defining the mounting flange dimensions and drive-square size between a part-turn actuator and the valve it operates - matching to it means an actuator from one manufacturer can mount to a valve from another.
Single-acting (spring-return) is specified when the valve must move to a defined safe position on loss of air supply. Double-acting holds its last position on air loss and is generally the more economical option when that fail-safe behaviour isn’t required.
Send the duty, media and sizing you have - we target a quote inside 24 hours.
