●The seat ring uses the floating seat ring structure with o-seal ring sealed and pre-tightening force applied to have inlet and outlet dual-way sealed; and the open-close moment with this structure is ? that of the common valves only, able to lightly open and close valves.

●The seat ring uses the sealing face inlaid with PTFE, so has dual seals of PTFE to metal and metal to metal, the PTFE sealing face also acts as removing the dirt on the wedge disc.

●The wedge disc of the valve is always fitted with the sealing face whether in full open or full close status to have the sealing face protected without being directly eroded by the medium so as to extend the duration.

●When fully opened, the valve's channel is smooth and linear, with an extremely small flow resisting coefficient and no pressure loss, and the pipeline can be cleaned with hair-ball through it.

●Automatic removal of the high pressure in the internal cavity when the valve is about to close(see the working principle diagram for the details) so as to ensure safety.

●Use a sealed gear-driving open-close indicating mechanism, which is able to clearly show the open-close condition of the valve in a long term.

●The external surface of the directly built-in valve is corrosion resisting treated with epoxy coal bitumen and can be the same duration as the pipeline.