1, for the diversion of the valve

Depending on the commutation, this valve may have three or more channels, suitable for use with plug valves and ball valves. Most of the valves used for diversion are selected for this type of valve. In some cases, other types of valves, with two or more, are only properly connected to each other and can also be used as a commutation for media.

2, with medium valves with suspended particles

If the media with suspended particles, the most suitable for use with its opening and closing parts along the sealing surface with a wipe the role of the valve. Such as flat gate valve.

3, cut off and connect the media with the valve

Usually choose a smaller flow resistance, the flow channel for the straight-through valve. Such valves have gate valves, globe valves, plunger valves. Down closed valve, because the channel twists and turns, flow resistance than other valves, so less use. However, in the case of allowing higher flow resistance, closed valves can also be used.

4, control the flow of the valve

Usually choose to easily adjust the flow of the valve. Such as the control valve, throttle valve, plunger valve, because its seat size and the opening and closing of the stroke between the proportional relationship. Rotary (such as plug valves, ball valves, butterfly valves) and deflection valve type (pinch valve, diaphragm valve) valves can also be used for throttle control, but usually only in the limited range of valve diameter. In most cases, people usually use the valve to change the shape of the valve after the throttle. It should be noted that it is unreasonable to achieve the throttling effect by changing the opening height of the gate valve or shut-off valve. Because the medium in the pipeline in the throttling state, the flow rate is high, the sealing surface is easy to be washed wear, loss of sealing effect, the same token, with a throttle as a cutting device is unreasonable.