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

2. The sealing surface of valve disc and valve body is made of iron-base alloy or Stellite cobalt-based hard alloy. It has good wear resistance, high temperature resistance, corrosion resistance, abrasion 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 material variety is complete, gasket can be selected according to the actual working conditions or user requirements, can be suitable for a variety of pressure, temperature and medium conditions.

5. It can design and manufacture check valves with different structure forms and connection forms according to user requirements, and it can be used for all kinds of equipment.