Plate and frame air cleaner's safety arrangement

The utility model relates to an air filtration apparatus of fan provides a plate and frame air cleaner's safety arrangement. A plate and frame air cleaner's safety arrangement who provides has the shell of installing on the air filter cartridge internal frame, the shell in install the pressure port assembly, the pressure port assembly is a set of at least, and every group pressure port assembly includes malleation pressure port assembly and negative pressure pressure port assembly, malleation pressure port assembly, negative pressure pressure port overall composition do not install the different positions at the air filter cartridge inside casing, the incline direction of malleation pressure port assembly door frame and the slope opposite direction of negative pressure pressure port assembly door frame, the front of door frame is provided with the door plant, the door plant slope sets up, a pot head of door plant is put on the door -hinge, and can wind door -hinge swing, the axle headconnecting plate is passe