1. The product is designed, manufactured and inspected according to the national standard GB 12235, with reliable sealing and excellent performance.

2. The sealing surfaces of valve clack and valve body are made of iron base alloy or stellite cobalt base hard alloy by surfacing welding, with good wear resistance, high temperature resistance, corrosion resistance, scratch resistance and long service life.

3. Various piping flange standards and flange sealing surface types can be used to meet various engineering needs and user requirements.

4. The valve body materials are complete, and the gaskets can be reasonably selected according to the actual working conditions or user requirements, which can be applicable to various pressure, temperature and medium working conditions.

5. Check valves with different structural forms and connection forms can be designed and manufactured according to user requirements for supporting use of various equipment.