Introduction to the advantages of electro-hydraulic reversing valves

Electro-hydraulic reversing valve is the core element in the hydraulic system to realize fluid direction control. It drives the pilot valve through electromagnetic force to control the main valve core to switch oil circuits, and is widely used in industrial automation, engineering machinery, agricultural machinery and other fields. Its core advantages are as follows:

1. High response speed and accurate control

Short response time: the solenoid drives the pilot valve, and the reversing time can be as low as milliseconds (such as within 50ms), which is suitable for high-frequency action scenarios (such as injection molding machine molding, machine tool feeding).

High control accuracy: By adjusting the pilot valve flow, the main valve core displacement can be accurately controlled, achieving stable start-stop and speed adjustment of the hydraulic cylinder.

Case: In CNC machine tools, electro-hydraulic reversing valves and servo systems can achieve accurate control of tool feed speed, with processing accuracy up to ±0.01mm.

2. Large flow rate and high voltage adaptability

Large flow processing capacity: The diameter range covers 10mm to 32mm, and the flow rate can reach 1100L/min, meeting the needs of heavy equipment (such as excavator hydraulic systems).

High pressure working capacity: The working pressure can reach 31.5MPa, adapting to high load conditions (such as die-casting machine mold clamping, crane rotation).

3. High reliability and durability

Wet electromagnet design: The electromagnet is oil-soaked, has excellent heat dissipation performance, and has a lifespan of up to 1 million commutation times.

Strong anti-pollution ability: the gap between the main valve core and the valve body is designed reasonably, which can tolerate a certain degree of oil pollution and reduce maintenance frequency.

Test data:

Wet electromagnet life: ≥1 million times (ISO 4401 standard)

Anti-pollution level: NAS 1638 Level 9 (tolerable particle size ≤10μm)

4. Flexible control method

Electromagnetic pilot control: supports DC (DC) or AC (AC) electromagnets, adapted to different power supply environments (such as industrial power grid, vehicle power supply).

Main valve reset method: Spring centering: The valve core is automatically reset after power is cut off to ensure system safety.

Hydraulic centering: The valve core positioning is achieved by controlling the oil circuit, suitable for complex working conditions.

Application scenarios:

Spring centering: Excavator hydraulic system, automatically switch to the safe position when power is cut off.

Hydraulic centering: Injection molding machine mold clamping control, the valve core position needs to be carefully ensured.

5. Strong environmental adaptability

High protection level: IP65 protection, dustproof and waterproof, adapted to harsh industrial environments (such as mines and ports).

Wide temperature range: The operating temperature range can reach -40℃ to +120℃, meeting extreme climatic conditions.

Case:

Polar engineering equipment: At low temperatures of -40℃, the electromagnet is kept working normally through heating elements.

Equipment in tropical areas: IP65 protection ensures continuous operation during the rainy season.

6. Energy saving and low power consumption

Zero power consumption retaining valve position: Some models adopt permanent magnet retaining technology, and the valve core position is locked after power is cut off, and there is no need for continuous power supply.

Low-power electromagnet: The power consumption of DC electromagnet is only 5-20W, reducing system energy consumption.

7. Easy to integrate and maintain

Modular design: It can be combined with other hydraulic components (such as pressure reducing valves and throttle valves) to form an integrated control unit.

Easy maintenance: The valve body is compact, and the replacement of seals or solenoids does not require disassembly of the entire system.

Case:

Automated production line: Through integrated design, the hydraulic station area is reduced by 30%.

Maintenance efficiency: The time to replace the electromagnet is reduced from 2 hours to 30 minutes.

8. Wide application scenarios

Industrial automation: machine tools, injection molding machines, die-casting machines.

Construction machinery: excavators, cranes, and road rollers.

Agricultural machinery: tractors, combined harvesters.

Transportation: automobiles, ships, rail transit.

Summarize:

With its advantages of high response, large flow rate, high reliability, flexible control, and strong environmental adaptability, electro-hydraulic reversing valves have become the core control element of hydraulic system. Through reasonable selection and maintenance, equipment performance and life can be significantly improved and operating costs can be reduced.