(1) Motor reversing valve, motor reversing valve is also known as travel valve. (2) Electromagnetic directional valve, electromagnetic directional valve is the use of electromagnetic attraction to control the direction of the spool transposition valve.

Ensure that the hydraulic control check valve has sufficient control pressure, and do not allow the control pressure to lose pressure. Attention should be paid to whether the control pressure meets the requirements of reverse opening. If the control of the hydraulic check valve leads to the autonomous system, the influence of the change of the main system pressure on the control oil circuit pressure should be analyzed to avoid the misoperation of the hydraulic check valve.

The hydraulic control check valve is a valve that can reverse the flow of the check valve by controlling the fluid pressure. This kind of valve plays an important role in the hydraulic support equipment of coal mine machinery. The difference between the hydraulic check valve and the ordinary check valve is that there is more than one control oil path K

Nowadays, mining machinery and equipment enterprises are paying more and more attention to the research and development and production of high-energy, energy-saving and environmental protection equipment. For example, mining machinery uses the design principles of long life, low energy consumption and weight reduction. Materials with low environmental load are used in actual production, and harmful materials such as freon, chlorine-containing rubber, resin and asbestos are not used as much as possible.