Flow Control Valves

Flow control valves are powered from hydraulic and pneumatic sources. The length ranges from 25-35mm and above, breadth from 16-38mm and above, height from 20-25mm and above, diameter from 13-26mm and above. The device is manufactured using cast iron, ductile iron and stainless steel. It is mainly used in sewage and water treatment plants.

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Detailed Description for Flow Control Valves

A flow control valve adjusts the movement or pressure of a liquid. Control valves usually react to signals made by independent equipments like flow meters or temperature gauges.

Control valves are usually connected with actuators and positioners. Pneumatically-actuated globe valves and Diaphragm Valves are widely used for regulating various objectives in several industries, although quarter-turn types such as (modified) ball, gate and butterfly valves are also used.

Flow control valves will be controlled with external monitoring equipments such as pressure and temperature gauges. A flow control valve is generally a diaphragm or globe valve, although other valves—such as modified ball and gate valves—have been used in certain applications.

Most of the time, a flow control valve will be controlled using a hydraulic mechanism. This kind of flow control valve is known as an automatic control valve, as it does not need any outside mechanism or sensor to regulate the valve opening. Instead, these valves use a built-in relief mechanism. These relief mechanisms are available in wide variety and use the unideal conditions of the liquid being regulated to operate.

One example of this is known as a relief valve. Also known as a pressure flow control valve, relief valves are normally found on steam generators and are used to prevent steam explosions. If steam goes uncontrolled, it could inflate to the point where the boiler tubing would rupture. In the relief valve itself, the only exit for steam to leak is held under a certain amount of resistance. The power needed to overcome the resistance of the relief valve is equivalent to the extreme pressure capacity of the boiler; this means that once the steam reaches too high a pressure, the pressure from the steam alone will be enough to open the valve.

Another type of flow control valve is known as an altitude valve, which regulates the volume of fuel and water tanks. Altitude valves help to avert tanks from overflowing, which is very essential for filling processes. The valve will be kept open until the tank reaches its maximum capacity. When this happens, the valve is closed automatically through a built-in switch.


Some flow control valves are controlled through exterior devices, such as monitors and gauges. These gauges or monitors are often designed to send a signal to the valve when the working liquid goes out of a certain flow or pressure range. When this happens, these exterior devices send a signal to the control valve, which will further open or close to help adjust the flow or pressure of the fluid.



·         For gas or oil transmission, for gas supply to industrial and power plants

·         For all tasks of flow-rate or pressure control with small change dynamics

·         Suitable for natural gas, other non-aggressive gases and Liquid



·         High capacity and high range ability due to axial flow

·         Accurate control due to the pressure balanced trim

·         Valve sleeve with full pressure compensation

·         Noise reducing devices as a standard feature

·         Bi-directional flowing and sealing

·         Unique 90º Tooth-rack transmission

·         In case of a current failure → valve remains in last position

·         Pneumatic electric and electro-hydraulic actuators available



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