Technical performance: 

1. Work pressure: 15-31.5MPa. 

2. Handle force during liquid injection: 157N. 

3. Working medium: emulsion containing 1% 2%M10. 

4. Working principle. 

For the control valve of the hydraulic support for coal mining in coal mine, the valve core in the valve core assembly is placed in the hole in the center of the valve sleeve, the left end of the valve tightens the valve seat with a fixed plug, and the right end passes through the outer circle of the valve core. 

The upper shoulder rests on the hollow shoulder of the valve sleeve, so that the valve core is the whole valve core (assembly) structure, which can be assembled separately into the valve hole or taken out, which makes the assembly process simpler and the downhole maintenance more convenient. 

Under the condition of keeping the same size as the same type valve, the over-liquid area in every part of the valve is increased by structural design. 

Ability

The return port in the valve is adjacent to the working port, which effectively reduces the return resistance and improves the working efficiency of the hydraulic system. 

Implementation Standard: MT419-1995 "Valves for hydraulic supports"