1. The product is designed and manufactured according to the national standard GB/T12236, with reasonable structure, 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, which is wear-resistant, high temperature resistant, corrosion resistant, with good 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. The valve disc rotates around the pin outside the valve seat to reduce the violent impact when closing.

6. The pin shaft is connected with the valve disc in a built-in structure, without any external leakage point, so the use is more reliable.