1. S/Z series adopts double gate bidirectional elastic sealing, flexible opening and closing, quick and reliable sealing

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

3. When used as an opening and closing device on the pipeline, it must be in the state of full open or full closed, and shall not be used to regulate the flow

4, the valve connection way has flange and welding two, the drive way is manual and electric, the structure is more complex.