Flow Valve And Accessories

Flow Valve And Accessories

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Flow Valve And Accessories


What is a flow control valve?

A flow control valve is an element that controls pressure and flow in a system or process. These mechanical devices are used to control liquids, gases, steam, slurries etc. Some control valves are manual, automatic control valves can also be used when environmental conditions are suitable for such installations.

Flow control valves manufactured by Huade are hydraulically operated and throttled to maintain a preset flow or limit a maximum flow, regardless of upstream and downstream pressure changes. The throttle position of the main valve is controlled by an adjustable pilot valve that senses the pressure across the orifice.

If you are looking for the leading flow control valve supplier, welcome to choose Huade, with high-tech, high-precision, high-efficiency process equipment and testing methods, as well as independent product research and development capabilities. Our hydraulic valves are exported to India, Vietnam, Russia, Europe and other countries and regions, and are well received by customers.


Functions of different control valve parts:

Control flow

Relieve specific stress on the system

Increase or decrease traffic

Open or close the stream

Regulate flow or process pressure


How does a flow control valve work?

The control valve is a device that controls the fluid flow rate by changing the size of the flow passage. The control valve is applied to directly control the flow of fluid and indirectly control the process quantities such as liquid level, temperature and pressure, the signal command is given by the controller in the closed control loop.

Components of the control valve:

Valve: This is the regulating element of the control valve, which contains a ball, plug, butterfly or plug. The part of the valve that regulates the flow is called the trim.

Actuator: Designed to move the valve stem. It can be carried out pneumatically, hydraulically or electrically. Pneumatic valves are the simplest because they only require a supply of compressed air. Motorized valves require additional cables and switchgear. Hydraulically actuated valves require high pressure supply and return lines as well as for hydraulic fluid.

Valve Positioner: Make sure the position of the valve stem corresponds to the set point of the controller system. It requires position feedback from the valve stem and delivers pneumatic pressure to the actuator to open or close the valve.


Flow control valve types:

Based on the drive media used: 

Manual valve: Contains a handwheel or a lever and can be manually operated.

Pneumatic valve: driven by compressed material medium. The most common medium is air. Nitrogen and hydrocarbons can also be used.

Hydraulic valve: Actuated by incompressible material. The most common medium is water, but oil is sometimes used.

Electric Valves: They are driven by electric motors.

Valve-based functionality: 

Proportional Control Valve: Flow is controlled by an automatic proportional action based on a signal received by the controller. Valves that can be used include ball valves, globe valves, etc.

On-Off Valve: The valve is either fully closed or fully open. There are gate valves, ball valves, globe valves, etc.

Check Valves: Motion profile based on control elements.

Rotary Valve: It contains a disc that performs a rotary motion, the rotation causing the flow channel. Such as ball valve, butterfly valve, etc.

Welcome to contact us for detailed information about wholesale flow control valve!

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