1. The packing chamber of the valve cover in our factory has a water seal structure. When the interface is filled with water of pressure 0.6-1.0 MPa, the system can be isolated from the atmosphere to ensure good air tightness of the system.

2. The inverted seal is made of stainless steel thread connection seal or body surfacing welding Austenitic stainless steel, and the seal is reliable. The packing replacement can be carried out without stopping the machine, which is convenient and quick without affecting the operation of the system.

3. the product structure is simple, compact and reasonable, convenient maintenance, long service life.

4. To be used as an opening and closing device in a pipeline, it must be in a fully open or closed state and not be used to regulate the flow rate.

5. the product structure is novel and the shape is beautiful. The connection ends are flanged and welded, and can be configured according to the different requirements of users.