Rotork’s hydraulic valve actuators

Rotork RHQ extreme duty rack and pinion hydraulic actuators are designed for the most challenging applications in industry, mining and offshore offering typical examples. The balanced design incorporating four power cylinders creates a very compact footprint and provides efficient power consumption across an economical range of eight model sizes.
The range features the benefits of rugged rack and pinion mechanics including IP68 environmental protection, low maintenance and ease of servicing. Cylinder life is optimised through the combination of electroless nickel plating and redundant piston seals. Individual cylinders are easily serviced on the valve without disturbing the other actuator parts.
The maximum standard output torque is 700,000 Nm (6,200,000 lbf-in) with up to 5,650,000 Nm (50,000,000 lbf-in) available upon request.
Rotork can also design and supply customised hydraulic power units (HPU) for RHQ actuator operation, providing a single source for the complete valve actuation package. Rotork HPUs meet any global engineering and manufacturing standards and can be optimised for hazardous, corrosive or environmentally sensitive areas. The choice of specifications includes stored energy accumulators, redundant pumps and controls, and multiple prime movers including solar power and gas to support traditional electrical drives.

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