In the complex system of modern industrial production, the hydraulic system, as a key link in power transmission and control, plays a decisive role in the efficient and stable operation of equipment. As one of the core components of the hydraulic system, the cartridge valve has become the first choice in many industrial fields due to its excellent performance and wide applicability.
The structure and working principle of the cartridge valve
The basic structure of the cartridge valve consists of three parts: the insert element, the control cover plate, and the channel block. The insert element is the basis, which is precisely composed of the valve core, valve sleeve, spring and seal, providing the execution unit for the basic action of the valve. The control cover plate cleverly installs the corresponding pilot control level components according to different control functions, just like a brain, accurately regulating the operation of the cartridge valve. The channel block is not only a solid basic valve body for embedding the insert element and installing the control cover plate, but also a key connecting body between the main oil circuit and the control oil circuit, ensuring the orderly transmission of fluid in the hydraulic system.
From the working principle, the cartridge valve is like a well-trained traffic commander, which can accurately realize the opening and closing of the A and B oil ports of the main oil circuit by controlling the pressure changes of the oil port. When there is no hydraulic action at the control port, the hydraulic pressure at the bottom of the valve core instantly exceeds the spring force, the valve core is quickly pushed open, the A and B oil circuits are smoothly connected, and the fluid can flow as needed, and its flow direction is flexibly determined by the pressure of the A and B ports. Conversely, when there is hydraulic pressure at the control port and the pressure meets certain conditions, the space between port A and port B will be quickly closed, effectively preventing the passage of fluid.
Significant advantages of cartridge valves
Cartridge valves have many remarkable advantages, and their core performance data are as follows:
Flow capacity: The flow capacity of some cartridge valves can reach more than 10,000L/min, far exceeding traditional tubular valves, and can easily cope with large flow conditions.
Response speed: In scenarios such as die-casting machine clamping mechanisms that require extremely high response speed, high-pressure switching can be completed within 0.02 seconds.
Working reliability: The cone sealing technology is adopted, and the sealing performance is excellent; there is no strict matching requirement between the valve core and the valve sleeve, and the wear is light, not easy to clog, and there is no hydraulic clamping phenomenon. Statistics from a construction machinery company show that the failure interval time (MTBF) of the hydraulic system using cartridge valves is 12,000 hours, which is 40% higher than that of traditional valve groups, and the annual maintenance cost is reduced by 35%.
|
Advantage Type |
Specific data |
|
Flow capacity |
Up to 10000L/min or more |
|
Response speed |
High-pressure switching is completed within 0.02 seconds (such as die-casting machine clamping mechanism) |
|
Time between failures |
12,000 hours (40% higher than traditional valve groups) |
|
Reduced annual maintenance costs |
35% |
Wide application of cartridge valves in the industrial field
Due to its excellent performance, cartridge valves have shown strong applicability in multiple industrial fields:
Heavy-duty engineering machinery field: large-diameter cartridge valves (DN40-DN50) can withstand high pressures above 35MPa, with a flow capacity of ≥500L/min, suitable for high-load conditions such as excavators and cranes.
Quick response system: The response time of cone valve cartridge valves is ≤3ms, suitable for precision control scenarios such as high-speed stamping machines and hydraulic servo robots.
Highly polluted environment: The explosion-proof cartridge valve group adopts stainless steel valve core + two-stage filtration and is ATEX certified to meet the needs of harsh environments such as coal mines and metallurgy.
Energy-saving system: The pressure loss of load-sensitive cartridge valves is reduced by 40%, and the system efficiency can be achieved ≥85% with variable pumps. It is widely used in energy-saving transformation of equipment such as injection molding machines and die-casting machines.
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Application Areas |
Applicable cartridge valve types |
Key Performance Indicators |
Typical equipment |
|
Heavy-duty construction machinery |
Large diameter cartridge valve (DN40-DN50 |
Withstands high pressure above 35MPa, flow capacity ≥500L/min |
Excavators, cranes |
|
Rapid response system |
Poppet-type cartridge valve |
Response time ≤3ms |
High-speed stamping machine, hydraulic servo robot |
|
Highly polluted environment |
Explosion-proof cartridge valve group |
Stainless steel valve core + dual-stage filtration, ATEX certified |
Coal mining and metallurgical equipment |
|
Energy saving system |
Load Sensing Cartridge Valves |
Pressure loss reduced by 40%, system efficiency ≥85% |
Injection molding machine, die casting machine |
With the advent of the Industrial 4.0 era, the manufacturing industry has put forward higher requirements for the intelligence, efficiency and energy saving of production equipment. As the core component of the hydraulic system, the cartridge valve will continue to innovate and upgrade its technology to meet the growing market demand. It is believed that in the future, the cartridge valve will play a key role in more fields and inject strong impetus into the efficient and stable operation of industrial production.
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Post time: Jul-01-2025