1. Opening the full cross-section flow, and the pipe smooth excessive, no curvature change, operating rotary resistance is small, thus reducing the medium on the valve spool and valve body wear, prolonging the service life, and protecting the dome sealing surface.

2. The sealing ring is made of special rubber, which has wide wear resistance and wide temperature range.

3. Simple structure, directly drive the spool to make the valve in the open and close state, easy to maintain.

4. The dome valve is strong in design and can be used for other valves.