How to use 4WE10 single-head solenoid reversing valve

4WE10 single-head solenoid reversing valve is a common hydraulic control element. It is widely used in industrial hydraulic systems. It is used to control the flow direction of hydraulic oil and realize the start, stop, reversal and speed adjustment of actuators (such as hydraulic cylinders and hydraulic motors). The following are the detailed usage methods and precautions:

1. Basic structure and working principle

Structural composition:

Valve body: usually made of cast iron or steel, with multiple oil passages inside.

Electromagnets: divided into two types: AC (AC) or DC (DC), and the valve core is controlled by power-on/off.

Valve spool: It can slide in the valve body under the action of a solenoid to change the oil circuit connection method.

Spring: Used to reset the valve core (restore the initial position when power is off).

Seal: Prevent hydraulic oil leakage.

How it works:

Power-off status: The spring pushes the valve core to its initial position, hydraulic oil flows from the oil inlet (P) to the oil return port (T), and the actuator stops or returns.

Power-on state: The solenoid generates magnetic force to attract the valve core, change the oil circuit connection, and causes hydraulic oil to flow from the oil inlet (P) to the working oil outlet (A or B), driving the actuator to operate.

2. Prepare before use

Selection confirmation:

Select the appropriate specifications of 4WE10 valves (such as rated pressure, diameter) according to the system pressure and flow rate.

Confirm that the solenoid voltage (such as AC220V, DC24V) matches the power supply.

Check whether the valve installation method (plate type, tube type) is compatible with the system.

Installation environment check:

Ensure that the installation location is dry and ventilated to avoid high temperatures, corrosive gases or liquids.

Stay away from vibration sources to prevent the valve core from being stuck.

Hydraulic system preparation:

Clean the hydraulic pipeline to prevent impurities from entering the valve body.

Confirm that the cleanliness of the hydraulic oil meet the requirements (usually NAS grades 6-8).

3. Installation steps

Fixed valve body:

Use bolts to securely install the valve body on the hydraulic station or equipment to ensure no looseness.

The plate valve must be connected to the system through the bottom plate, and be sure to install the seal ring in place.

Connecting oil circuit:

Oil inlet (P): Connect to the hydraulic pump outlet.

Oil return port (T): Connect the oil tank or oil return pipeline.

Working oil port (A/B): Connect the inlet/return oil port of the hydraulic cylinder or hydraulic motor.

Leak oil port (L) (if any): Connect to the oil tank to discharge internal leaked oil.

Electrical connection:

Connect the solenoid coil leads into the control circuit and pay attention to the polarity (DC solenoids need to distinguish between positive and negative poles).

Install an overload protection device (such as a fuse) to prevent the coil from burning.

4. Debugging and operation

Manual debugging (some models support):

Use a manual reversing rod (if any) to test whether the valve core is flexible.

Observe whether there is any leakage in the valve body.

Power-on test:

Low-pressure start: First turn on the power at low pressure (such as 20%-30% of the system pressure) to check whether the valve core is moving smoothly.

Full pressure test: Gradually boost the pressure to the rated pressure to confirm that there is no abnormal noise or vibration.

Direction verification: Use a pressure gauge or flowmeter to confirm whether the hydraulic oil flow direction meets the design requirements.

Linked debugging:

Connect the solenoid valve to the PLC or relay control circuit to test the automation control function.

Adjust the delay parameters (if required) to ensure that the commutation process is impactless.

5. Daily maintenance and troubleshooting

Regular inspection:

Check the valve body sealing every 3-6 months and replace the aging sealing ring.

Clean the valve body surface and prevent dust from entering.

Common faults and handling:

Valve spool stuck:

Cause: Oil contamination, valve core wear.

Treatment: Disassemble and clean the valve body, replace the filter element or valve spool.

Electromagnets do not attach to:

Cause: The coil is burned, the power supply is malfunctioning.

Treatment: Use a multimeter to detect the coil resistance, replace the damaged coil or check the power supply.

Serious leak:

Cause: Sealing ring damaged, valve body cracks.

Treatment: Replace the seal ring or valve body.

Great commutation impact:

Cause: System pressure fluctuations and valve core response is slow.

Processing: Add an accumulator or buffer device to optimize the control logic.

6. Safety precautions

Power-off operation: During maintenance, power supply must be cut off and system pressure must be released to prevent accidental start-up.

Anti-electric shock: The electrical connection must be operated by professionals to avoid exposed wires from touching metal parts.

Pressure limit: It is strictly forbidden to use exceeding the rated pressure of the valve to prevent the valve body from bursting.

Oil Management: Use the recommended model of hydraulic oil, regularly replace and monitor oil quality.

7. Application cases

Hydraulic cylinder reversing control: The extension/retraction action of the hydraulic cylinder is controlled through the 4WE10 valve.

Machine tool clamping system: clamp the workpiece when power is on and loosen when power is off.

Automated production line: cooperate with sensors and PLC to achieve sequential action control.

Through standardized operation and regular maintenance, the 4WE10 single-head solenoid reversing valve can operate stably for a long time, significantly improving the reliability and efficiency of the hydraulic system. If there is a complex failure, it is recommended to contact professional maintenance personnel to deal with it.