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IMI Critical Engineering is a world-leading provider of critical flow control solutions that enable vital energy and process industries to operate safely, cleanly, reliably and more efficiently.
We design, manufacture and install customised, highly engineered solutions for new plant builds and also provide complete plant lifecycle service support. This ensures that our customers benefit from efficient maintenance, speedy issue resolution and plant optimisation at all times.
We deliver great solutions to our customers through a unique combination of engineering know-how and fluid controls technology. At the heart of our 'Engineering great solutions' ethos is customer value.
The unique combination of our IMI Critical Engineering companies' know-how and worldwide experience underpins our reputation as a leading global supplier to the major energy and industrial process sectors.
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Two shaft designs
Internal shaft (Type 440). The valve shaft is located inside the cross-section of the pipe. This effects a higher pressure drop, but due to the short length of the levers a relative low torque at the shaft is required. Due to the small free cross-section on small nominal diameters not recommended below DN 600 (24“).
External shaft (Type 450). The valve shaft is located outside the cross-section of the pipe. Due to the long levers, the required torques increase significantly, whereas the pressure drop decreases slightly. Nominal diameters from DN 200 (8”).
Worm gear box with hand / chain wheel or electric actuator.
Hydraulic / Pneumatic actuators. Cylinders or rotary actuators, including safety function (spring or counter weight) if desired.
Electro-hydraulic actuator. Independent actuation system, including safety function by hydraulic accumulator if requested.
Choice of shaft location depending upon application
Locked grease holes for easy regreasing
Maintenance free operation
Good performance under high static pressure
Choice of actuation
Strong reference base for installed valves.
Execution with internal shaft-type 440. A turning motion of approx. 70° at the actuation shaft effects a tilting motion of 90° of the valve disc
Execution with external shaft - Type 450. Only a turning motion of approx. 42° is necessary for a 90°- movement of the valve disc.
IMI Critical Engineering, Lakeside, Solihull Parkway, Birmingham Business Park, Birmingham B37 7XZ
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