Product Description

Sany crane original electro-hydraulic reversing valve LH3G1 electromagnetic hydraulic reversing valve

60212019 Suitable for Sany mobile cranes STC250T-STC800T use

Function:

Crane electromagnetic hydraulic reversing valve has a variety of important role, the following is a specific introduction:

1. **Control the hydraulic oil flow direction **
- **Changing the direction of the actuator action**: In the hydraulic system of the crane, the electromagnetic hydraulic reversing valve controls the movement of the spool through the energization and de-energization of the solenoid, thus changing the direction of flow of the hydraulic oil. For example, when the boom needs to rise, the reversing valve switches the oil circuit, so that the hydraulic oil flows into the rodless cavity of the boom telescopic cylinder, pushing the boom to rise; when the boom needs to fall, the reversing valve switches the oil circuit again, so that the hydraulic oil enters the rod cavity, and the boom descends under the joint action of gravity and hydraulic oil. In this way, according to different operational requirements, the crane can accurately control the direction of the action of each actuator, such as boom expansion and contraction, luffing, slewing and so on.
- **Realize compound action**: It can control the action of multiple actuators simultaneously or separately to realize complex compound action. For example, in the process of lifting goods, both the lifting and lowering of the boom, but also the need for crane slewing and luffing action, electromagnetic hydraulic directional valve can coordinate these actions, so that all parts of the crane in accordance with the predetermined procedures and sequences of movement, to improve operational efficiency and accuracy.

2. **Regulating hydraulic oil flow**
- **Control the speed of the actuator**: In addition to controlling the flow direction of the oil, the flow rate of the hydraulic oil can also be adjusted by changing the size of the opening of the valve port, thus controlling the movement speed of the crane actuator. For example, in the case of lifting fragile goods or having strict requirements on lifting speed, the flow rate of hydraulic oil can be reduced by decreasing the opening of the valve port of the reversing valve, so that the lifting and turning of the crane arm can be more stable and slow, and damage to goods or safety accidents can be avoided due to excessive speed.
- **Satisfy the demand of different working conditions**: In different working conditions, the speed requirement of the crane is also different. The electromagnetic hydraulic reversing valve can flexibly adjust the flow of hydraulic oil according to the actual demand, so that the crane can maintain good working performance under different working conditions, such as high-speed unloading and low-speed precise positioning.

3. **Guaranteeing safe and stable operation of the system**
- **Prevent hydraulic shock**: In the hydraulic system of the crane, due to the change of load, sudden stop of the actuator, etc., hydraulic shock may be generated. Electromagnetic hydraulic reversing valve can reduce the sudden change of the flow of hydraulic oil by switching the oil circuit quickly and accurately, thus effectively preventing the generation of hydraulic shock, protecting the components of the hydraulic system from damage and prolonging the service life of the system.
- **Realize overload protection**: When the load of the crane exceeds the rated value, the pressure of the system will rise. Electromagnetic hydraulic reversing valve can be used in conjunction with pressure relay and other devices, when the system pressure reaches the set value, it will automatically switch the oil circuit or limit the flow rate, preventing the system from overloading and guaranteeing the safe operation of the crane.
- **Remote control and automated operation**: Electromagnetic hydraulic reversing valve can be remotely controlled by electrical signals, and the operator can input control signals through control buttons, joysticks, etc. in the driver's cab or in a place far away from the crane to realize remote control of the crane. This not only improves the convenience and safety of operation, but also can be linked with other equipment or systems to realize the automated operation of the crane and improve work efficiency and production benefits.