1.  Bidirectional seal, solve small opening, large pressure difference

2. Using polytetrafluoroethylene bellows as sealing elements, it has excellent elasticity and sealing performance

3. With a limit block, control the stroke, and protect the four-fluorine bellows from cracking or damage due to excessive compression

4. The valve body has a guide bar, so that the valve will not shake during in the opening and closing process, because the medium scour the disc, improve the service life of the spool and valve stem

5. The spool and bellows are designed with socket structure, connected through the screw thread at the bottom of the valve stem, and the bellows are closely fitted with the spool, making the seal safe and reliable

6. It has the characteristics of large flow coefficient range and large adjustable ratio range. The disc can be adjusted according to different flow requirements