What are the types and characteristics of hydraulic valves?

Hydraulic valve is an important element in the Hydraulic System, it is mainly in the line for flow control, pressure regulation, 

direction control and safety protection and other roles. There are many types of Hydraulic valves, 

each type of hydraulic valve has its own characteristics and scope of application. This article will introduce the types and characteristics of hydraulic valves in detail.

First, the flow Control Valve

Flow control valve, referred to as flow valve, is an important valve element in the hydraulic system, it is by adjusting the size of the valve opening to control the size of the flow. There are many types of flow valves, including throttle valves, plug valves, needle valves, injection valves, etc., and their characteristics and scope of application are not the same.

1, throttle valve

Throttle valve is a kind of flow control valve, it reduces the cross-section of the flow path to achieve flow control. The working principle of the throttle valve is to produce a certain resistance in the flow cross-section, so that the flow rate is reduced. Throttle valves are widely used in hydraulic systems, mainly used for flow regulation and pressure reduction and speed reduction.

2、Plug valves

Plug valve is a multi-channel liquid control valve, in the hydraulic system to play the role of shunt and merge. Plug valve is characterized by a simple structure, easy maintenance and other advantages, especially suitable for use in poor working conditions. Plug valve is widely used in agricultural machinery, mining machinery and other industries.

3, needle valve

Needle valve is a flow control valve, needle valve by adjusting the position of the needle valve spool to achieve flow control. Needle valves are characterized by high flow regulation accuracy, wide flow range, etc., commonly used in precision hydraulic systems, such as metal cutting processing in the hydraulic follower.

Hydraulic valve

4, injection valve

Injection valve is a flow control valve, usually used in gasoline or diesel engines on the injection system. Injector valves are characterized by precise flow control for smooth and efficient engine operation.

Second, pressure control valve

Pressure control valve is an important element in the hydraulic system, which is used to control the pressure level of the system. There are many types of pressure control valves, including safety valves, Relief valves, pressure reducing valves, etc., and their characteristics and applications are different.

1、Safety valve

Safety valve is a valve component used in the hydraulic system to protect the system safety, usually used to prevent the system pressure is too high and lead to the explosion of the hydraulic system. Safety valves are characterized by a large flow, fast pressure reduction, sensitive action and other characteristics, widely used in a variety of mechanical equipment.

2、Relief valve

Relief valve is a kind of pressure control valve, mainly used for controlling the system's larger working pressure and protecting the system from being overloaded, when the system's pressure reaches the set value, the relief valve will flow the hydraulic oil back into the tank to keep the system pressure stable. Relief valve is characterized by a wide range of pressure, good stability and other advantages, commonly used in hydraulic systems to stabilize pressure control.

3, pressure reducing valve

Pressure reducing valve is a pressure control valve, mainly used to reduce the output pressure of the system or to ensure that the downstream equipment within a certain range of larger working pressure. Pressure reducing valve is characterized by simple structure, low cost and other advantages, usually used in low-pressure hydraulic or cyLinder operation control.

Third, the directional control valve

Directional control valve is an important element in the hydraulic system, used to control the flow of fluid to realize the hydraulic system of positive and negative rotation and movement. There are many types of directional control valves, including check valves, two-way valves, cartridge valves and so on.

1, check valve

One-way valve is a kind of valve element that allows the free flow of liquid, it only allows the liquid to flow in one direction, while in the other direction is blocked. One-way valve is characterized by simple structure, reliable operation and other advantages, commonly used in hydraulic systems for safety protection.

2、Bidirectional valve

Bidirectional valve is a kind of valve element that can let the liquid flow freely in two directions, and it can control bidirectional flow. Bidirectional valve is characterized by a large flow rate, fast flow rate, reliable and other advantages, widely used in hydraulic systems in the forward and reverse control.

3, cartridge valve

Cartridge valve is a kind of directional control valve, usually used in program control system, can be installed through the plug connection, convenient maintenance and replacement. Cartridge valves are characterized by easy installation, simple maintenance and other advantages, commonly used in construction machinery and road rollers and other industries.

In general, there are many types of hydraulic valves, and different types of hydraulic valves have their own characteristics and application scope. A good grasp of the classification and characteristics of hydraulic valves has an important role in design, maintenance and other aspects.

Recommended Goodies：

Eaton 4621 4623 5421 5423 6423 7620 Hydraulic Control Valve