Some use the valve

Some use the valve
Valve is a pipe attachment. It is used to change the channel section and flow direction of medium to control the flow of a device transmission medium. Specifically, the valve has the following purposes:
(1) connect or disconnect the line of media. Such as gate valve, globe valve, ball valves, plug valves, diaphragm valves, butterfly valves and so on.
(2) regulating, controlling the flow pipe and pressure in the medium. Such as throttle, regulating valve, reducing valve, safety valve and so on.
(3) pipeline in the medium to change the direction of flow. Such as the distribution of valves, three cocks, three, or four-way ball valve and so on.
(4) to prevent the line of medium back. A variety of different structures such as check valve, bottom valve.
(5) separation medium. A variety of different structures, such as steam traps, air traps and so on.
(6) direct and regulate fluid levels. Such as liquid level indicators, liquid level regulator, etc..
(7) other special purposes. Such as temperature control valve, over-current protection of emergency shut-off valve and so on.
Commonly used in these valves that are used to connect and disconnect the line media flow valve, the use of all the valves of the total number of about 80%.