According to the flow feature selection of pneumatic valve

, control flow with pneumatic valve
usually choose easy to adjust flow pneumatic valves. Such as regulating pneumatic valve, throttle valve, pneumatic valve, plunger because its pneumatic valve seat size and a journey into direct proportion relationship between opening and closing. Rotary ( Such as cock pneumatic valves, pneumatic ball valve, butterfly valve) And deflection type pneumatic valve body ( Clip pipe pneumatic valve, pneumatic diaphragm valve) Pneumatic valve can also be used to throttle control, but usually only in a limited range of pneumatic valve diameter. In most cases, people usually use change by the pneumatic valve pneumatic disc shape after for throttling. It should be pointed out that, with the change of pneumatic valve or by the pneumatic brake valve opening to implement throttling effect is very reasonable. Because, medium in throttling state in pipeline, the flow velocity is very high, easy to wash and wear on sealing surface, cut off the seal mechanism, in the same way, using pneumatic valve throttle as cutting device is unreasonable.
, truncation and on medium with pneumatic valve
usually choose small flow resistance, flow channel for straight-through pneumatic valves. This kind of pneumatic valve pneumatic valves have a gate, globe pneumatic valve, pneumatic valve plunger. Down close type pneumatic valve, due to the port twists and turns, flow resistance is higher than other pneumatic valve, therefore, less to choose. However, in the higher flow resistance is allowed, also can choose close type pneumatic valves.
、. Medium with suspended particles with a pneumatic valve
if medium containing suspended particles, the most suitable for using the open-close part along the sliding with wiping the pneumatic valve sealing surface. Such as flat brake pneumatic valve.
and the reversing shunt with pneumatic valve
, as required by the reversing shunt, the pneumatic valve can have three or more channels, suitable for choosing cock pneumatic valve and pneumatic ball valve. Most of pneumatic valves are used in the reversing shunt choose this kind of pneumatic valve. In some cases, other types of pneumatic valves, with two or more properly connected each other, also can be used as a medium of the reversing shunt.
the shape of the pneumatic valve opening and closing parts and pneumatic valve port pneumatic valves have a certain flow characteristic. When choosing pneumatic valves, must consider this.