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Types of Proportional Valve and their Application

Proportional Valve

For the uninitiated, a proportional valve is a device that has gained wide application in different industries, including agriculture, aerospace, and manufacturing. It is a sophisticated hydraulic system designed to regulate fluid flow within a hydraulic system. This blog post will discuss the different types of proportional valves available in the market and their various applications. As a reader, you can rest assured of a comprehensive understanding of proportional valves.

What is Proportional Valve?

Proportional valves are precision hydraulic and pneumatic control devices used to regulate fluid flow. They can provide accurate, repeatable, and stable control over various operating conditions. The valve is actuated with an electrical signal that determines the fluid flow rate in proportion to changes in pressure or current.

Types of  Proportional Valve and their Application

Servo Proportional Valve:

A servo proportional valve is one of the most common types of proportional valves. It combines electronic and hydraulic control to ensure precise positioning accuracy. It works by converting the electronic signal into a proportional hydraulic flow rate. Servo proportional valves are used in applications that require high accuracy control, such as die casting, injection moulding machines, and aerospace applications.

Electro-Hydraulic Proportional Valve:

This proportional valve type is ideal for applications requiring accurate pressure control. It is designed to maintain a constant pressure by controlling the flow rate in the hydraulic system. Electro-hydraulic proportional valves are widely used in press machines, metalworking equipment, and automotive applications.

Proportional Pressure Relief Valve:

A proportional pressure relief valve is a hydraulic pressure relief valve that controls the pressure in the system by modulating the flow rate. This type of valve is commonly used in various applications, such as marine applications, offshore drilling rigs, and hydraulic gear pumps.

Proportional Solenoids:

Proportional solenoids are electrically operated valves that can control the flow rate of hydraulic oil by regulating the opening size of the valve. They are used in applications that require precise control of flow rates. Proportional solenoids are commonly used in the automotive industry, marine applications, and agricultural equipment.

Proportional Directional Control Valves:

This valve is widely used in many applications because of its versatility and flexibility. The proportional directional control valve controls the direction and flow rate of hydraulic fluid. They are used in various mining, construction, and industrial machinery applications.


In conclusion, proportional valves are important in regulating fluid flow in a hydraulic system. By understanding the different types of proportional valves available and their various applications, industries can make informed decisions when selecting the best valve for their hydraulic system. Servo proportional valves are ideal for high accuracy control; electro-hydraulic proportional valves are used to maintain constant pressure, while proportional solenoids are used for precise control of flow rates. Proportional directional control valves are versatile and widely used in various industries. Understanding the different types of proportional valves and their applications is essential to maximize their benefits.

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