Check the pneumatic valve definition, function and classification

check flow pneumatic valve refers to rely on the media itself, and automatically open, her breath valve, used to prevent the backflow medium pneumatic valve, also known as non-return pneumatic valve, pneumatic valve, one-way flow pneumatic valve, pneumatic valve and back pressure.

check pneumatic valve function

check pneumatic valve belongs to a kind of automatic pneumatic valve, its main role is to prevent the backflow medium, to prevent the pump and drive motor reversal, and the discharge of the container medium. Check the pneumatic valve can also be used to give the pressure could rise to more than the system pressure of the auxiliary system supply piping.

check the classification of the pneumatic valve

check pneumatic valve according to its structure and installation method can be divided into:

a pneumatic valve, swing check: swing check pneumatic valve pneumatic valve disc shaped, pneumatic seat around the tunnel axis rotation movement, as in the pneumatic valve passage into a streamlined, flow resistance than lift check pneumatic valve is small, suitable for low flow velocity and flow not often change the large diameter of occasions, but should not be used for oscillating flow, its sealing performance than lift. Pneumatic valve swing check points, single type, double disc type and mostly type three, the three forms mainly by the pneumatic valve diameter, the purpose is to prevent the backflow medium flow or stop, decrease hydraulic shock.

2, lift check pneumatic valve, pneumatic valve pneumatic valve body along the vertical centerline sliding check pneumatic valve, pneumatic valve lift check can only be installed in horizontal pipe runs with the high pressure small check pneumatic valve pneumatic valve can be used on the ball. Lift check pneumatic valve pneumatic valve body shape as well as by the pneumatic valve ( With the pneumatic valve and general, so its fluid resistance coefficient is larger. Its structure is similar to stop pneumatic valve, pneumatic valve body and disc is the same as the cut-off pneumatic valve. Pneumatic valve upper part and lower part of the pneumatic valve cover processing has a guide sleeve, Jane Jane pneumatic disc guide can be freely within the pneumatic valve light guide Jane, when medium downstream, pneumatic disc by medium thrust open, when stop the flow of medium, landing on the hanging in the pneumatic pneumatic valve seat valve, prevent medium counter-current role. Straight-through lift check pneumatic valve medium import and export channel direction and pneumatic seat vertical direction; Vertical lift check pneumatic valve, its media channel direction and pneumatic valve seat in the same direction of imports and exports, its a straight-through flow resistance is small.

3, disc check pneumatic valve, pneumatic disc around a pneumatic seat inside the pin shaft rotation check pneumatic valve. Disc check pneumatic valve has simple structure and can only be installed in horizontal pipe runs, poor sealing.

4, pipeline check pneumatic valve, pneumatic valve disc sliding along the center line of the pneumatic valve pneumatic valves. Pipeline check pneumatic valve is a new kind of pneumatic valve and its small size, light in weight and good fabrication procedure, check the pneumatic valve is one of development direction. But fluid resistance coefficient than the swing check valve is slightly larger.

5, the compression type check pneumatic valve: this pneumatic valve is used as boiler feed water and steam to cut off the pneumatic valve, it can lift check pneumatic valve pneumatic valve and globe or Angle valve of the comprehensive function.