Zoomlion crane pressure-limiting pressure reducing relief control valve

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Introduction to the functions and classification of relief valves:

I. Overview of relief valves

Relief valve is a commonly used flow control component and is widely used in hydraulic, pneumatic and mechanical transmission systems. Its function is: when the fluid pressure exceeds a certain value, the excess fluid is brought back to the oil storage tank to ensure the safe operation of the system.

In applications, relief valves are widely used in flow control, hydraulic protection, circuit processing, machinery safety, etc. Different types of relief valves have different characteristics and application ranges. The following is an introduction to several common types such as hydraulic relief valves, pneumatic relief valves and solenoid relief valves.

II. Classification introduction of relief valves

1. Hydraulic relief valve

Hydraulic relief valve, also called pressure relief valve, is one of the commonly used components in hydraulic systems. When the hydraulic flow in the system exceeds the safe range, the hydraulic relief valve will automatically open and return the excess hydraulic oil flow to the tank. The working principle of the hydraulic relief valve is to achieve the purpose of flow control and pressure protection by adjusting the valve core, spring force and pressure signal on the movement.

2. Pneumatic relief valve

Pneumatic relief valve, also called overload pneumatic valve, transmits the overload signal to the valve core through compressed air, causing the relief valve port to open and discharge excess gas to play a protective role. Pneumatic relief valves can be used for overload protection of air compressors and pneumatic machinery.

3. Solenoid relief valve

The solenoid relief valve is a valve driven by an electromagnet. The electromagnetic attraction of the electromagnet is used to move the valve core to control the liquid flow. Solenoid relief valves can be used for flow control, pressure protection and loop processing.

III. Application cases of relief valves

Relief valves are widely used in engineering practice. Here are some common application cases:

1. In the aircraft hydraulic system, the hydraulic relief valve can protect the system from factors such as high pressure and high temperature and ensure the safe operation of the system;

2. In fixed hydraulic cranes, the hydraulic relief valve can control the lifting speed of the hydraulic cylinder to ensure the stability and safety of the machine;

3. In pneumatic jacks, the pneumatic relief valve can control the pressure so that the jack can rise and fall smoothly while preventing mechanical damage caused by overload.

As an important flow control component, the relief valve is widely used in engineering practice. Different types of relief valves have different characteristics and application ranges, and should be selected according to specific circumstances. Regardless of the type of relief valve, it must be well maintained and used during application to ensure the safe operation of the system.