Exchangeable Filter Of Treatment Device For Treatment Of In Particular Liquid Fluids And Treatment Device

The present invention discloses a processing device, in particular a filtering device, or a replaceable filter therefor and a processing device for processing fuel, oil or water. The replaceable filter has a housing equipped with a housing pot, a housing cover, an input end and an output end. The replaceable filter can be connected with a joint head of the processing device on the condition that a bayonet type connection mechanism rotates or inserts around the connection axis of the processing device. The connection mechanism has a housing-connecting part by the side of the housing and cooperates with at least one head-connecting part by the side of the joint for connecting the connection mechanism. The input end can be connected with an input part of the joint and/or the output end can be connected with an output part of the joint. The housing-connecting part has functional surfaces at the opposite side parts about the axial direction of the connection axis. The edge of the housing pot is axially and externa