The valve seat is designed to facilitate on-site maintenance, and it is designed in the whole basin, which is not easy to be blocked by impurities. The joint "O" type sealing line at both ends enables the pipeline installation to maintain reliable sealing without additional gaskets, and different materials can be selected according to different use requirements.

The axle pin adopts the American patent design withdrawal pin structure, which can tightly connect the valve flap and valve shaft together without loosening, weakening the strength of the shaft, and has good interchangeability.

The operating structure is flexible, and different rotating devices such as handles, worm gears and worms can be configured according to customer requirements. The worm gears and worms can also be equipped with signal devices at the same time.