Worm gear plug valve

Plug valve of the structure is simple, rapid switching, fluid resistance small, corner fast trip operation. Under a state of emergency in the accident, etc., can be quickly connected or cut off the pipeline. With the valve, the valve compared to a more flexible operation, switch more quickly. Stopcock is used with the plug-hole as a hoist parts, with the plug stem rotation in order to achieve the headstock moves. Small non-filler plug valves, also known as "Hancock." Stopcock plug for the cone (also another cylinder), with the valve hole of the conical sealing surface with the composition .