1. Reasonable product structure, reliable sealing, excellent performance, beautiful shape;

2. Inverted pressure balanced structure, light switch action;

3. There is an oil groove between the valve body and the sealing surface, which can be injected into the valve seat at any time through the oil nozzle to increase the sealing performance;

4. The material and flange size of the parts can be selected according to the actual working conditions or user requirements to meet the needs of various working conditions.