A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. This enables the direct control of flow rate and the consequential control of process quantities such as pressure, temperature, and liquid level.

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An automatic control valve consists of three main parts in which each part exist in several types and designs:

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• Valve actuator - which moves the valve's modulating element, such as ball or butterfly.

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• Valve positioner - Who ensures the valve, has reached the desired degree of opening. This overcomes the problems of friction and wear.

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• Valve body - in which the modulating element, a plug, globe, ball or butterfly, is contained. , which can be summarized as per the following main groups :

  • Sliding Stem Control Valve ( Angle Seat Piston Type / Globe Valve)

  • Rotary Control Valve ( Butterfly / Ball Valves / V Notch Ball Valves)

  • Pinch Valve

  • Diaphragm Valves

 

Gastech with Their principles in Italy / USA  builds on a proud tradition of designing and manufacturing quality Control Valves for the Power, Desalination, Oil and Gas industries. From both design and engineering perspectives.