Actuation Accessories

​​​​​​IMI Critical Engineering designs and produces a wide range of actuation accessories to ensure superior performance and to satisfy the most demanding requirements in modulating, on/off and heavy duty service.

Accessory - 2030 Electronic Position Transmitter
The Electronic Position Transmitter (model 2030) is suitable for installation on quarter turn and linear actuators. It has been designed to meet various industrial application requirements, for exampl
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Accessory - 2130 Limit Switch
The Limit Switch (model 2130) is suitable for installation on rotary motion. It has been designed to meet various industrial application requirements, for example on board pneumatic actuators. The enc
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Accessory - AL Air-lock 101 Device
The Air-Lock pressure static device is composed of a TP Pneumatic pressure switch combined with 2 x 3 way valves ND 1/4 in a single body. The Air-Lock pressure static device is mounted on pneumatic ac
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Accessory - AV Volume Booster
The Volume Booster (model AV), available sizes 14 and 34, is designed to meet high speed control valve applications. It produces a high volume boosting action and contains an integral stabilizing
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Accessory - BD Derivative Booster
The Derivative Booster (model BD) is used in conjunction with a positioner on a control valve to increase stroking speed on pneumatic double acting actuators. It has been designed to exhaust one
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Accessory - BV Big Volume Booster
The Big Volume Booster (model BV) is designed to meet high speed control applications. It produces a high volume boosting action and contains an integral stabilizing by-pass valve, adjusted by a screw
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Accessory - BW Ultra High Capacity Booster
The BW Ultra High Capacity Booster is designed to meet high volume boosting requirements. The volume booster contains two activation regulators, one for supply amplification adjustment and the ot
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Accessory - CF Fast Commutator
The Fast Commutator (CF) is designed to be combined with two 3-way valves providing a shared pilot conduit. This accessory is designed to operate with a pilot pressure greater than 2 bar while still m
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Accessory - CO 3-Way Pneumatic Operating Valve
The 3-Way Pneumatic Operating Valve (model CO) is pilot operated, and designed for high flow applications. The 3-way valve is available in sizes , , 1, 1 and 2. The valve can be used in one or more s
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Accessory - CS Quick Exhaust
The Quick Exhaust (model CS) is a two-way valve used for on/off movement (trip or fail) to fully exhaust the connected chamber of the actuator. When this device is pilot operated and mounted on a modu
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Accessory - GR Manual Override
The Manual Override (model GR) is designed to manually move the actuator stem using a handwheel. The internal gear is mounted on ball bearings for high efficiency and for long operating life. All STI
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Accessory - MC Motion Converter
The Motion Converter (model MC) is suitable for the easy installation of rotary positioners on linear actuators. The device is available with an adjustable and changeable coupling kit to connect with
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Accessory - SAR Snap Acting Relay
The Snap Acting Relay (model SAR) is a narrow-band pneumatic controller with an adjustable setpoint. Pressure in the input chamber opposes the load on the adjusting spring. Whenever this input pr
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Accessory - SL Exhaust Protection System
The Exhaust Protection System (model SL) has excellent exhaust and silencing characteristics with minimal resistance to air flow. In addition, it has an integral check valve that enables the maximum I
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Accessory - TP Pneumatic Pressure Switch
The Pneumatic Pressure Switch (model TP) device has been designed to drive lock-up devices to the safety shut down position in the event supply air pressure falls below the operating safety value. The
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Accessory - UD Derivative Unit
The Derivative Unit (model UD) is a specific device to amplify the exhaust. The regulating system is specifically designed for modulation and allows an accurate calibration (tuning) to maximise speed
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Actuation Accessories