In general, the cylinder can be deformed or even damaged only if the cylinder is pressed and reaches or exceeds the strength limit of the cylinder.
The safety valve in the three-way valve is a key component that keeps the strut in a constant-resistance operating characteristic.
Strengthen and improve the water quality supervision and management of working medium in hydraulic system of working face.
At present, the injection chamber of the single hydraulic prop is the inner cavity of the living column, and the prop need to inject a large amount of working liquid to raise the living column.