Uses Z45X elastic soft seal valve seat is widely used as a regulator and shut-off devices on the use of product features a water, sewage, construction, petroleum, chemical, food, pharmaceutical, textile, electric power, shipbuilding, metallurgy, energy systems, fluid lines, flat-type seat, dirt accumulation does not appear to make more reliable seal 2, the overall package of nitrile rubber valve 3, the valve parts are rust resistant steel and copper alloy material that can be used for sewage systems adapt to poor working conditions 4, small size, light weight, ease of installation and maintenance 5, the valve stem three O-ring seal, greatly reducing the frictional resistance switch, the switch lightweight and watertight