(1) Cut off: Almost all valves have cut off function. Simply used to cut off without the need to adjust the flow can choose gate valve, ball valve, etc., requiring rapid cutting, then to plug, ball valve, butterfly valve, etc. more appropriate. The cut-off valve can both adjust the flow and cut off.

Butterfly valve can also be suitable for large flow adjustment.

(2) Change the direction of flow: Choose two (channel for L-shaped) or tee (channel is T-shaped) ball valve or plug, can quickly change the flow of materials, and because a valve up to more than two straight valve function, can simplify the operation, make the switch accurate, and can reduce the space occupied.

(3) Regulation: cut-off valve, plunger valve can meet the general flow adjustment, needle valve can be used for micro-adjustment, in a large flow range of stability (pressure, flow) of the regulation, the throttle valve is advisable.

(4) Check: Check valve should be used to prevent material from flowing back. (5) Different production process can choose to have additional function of the valve, such as with jacket, with row Kangkou and with bypass valve, there is used to prevent the deposition of solid particles with the valve, such as blowing.