Abstract: Filtering element for corrosive liquids to be filtered under pressure, which displays only minimal filtrate loss when the filter is changed, consisting of a pressure-resistant, cup-shaped outer supporting body (2) and a coaxial, also cup-shaped, pressure-resistant inner supporting body (3) having bottom surfaces (4, 5), wherein a filter cartridge (6) is disposed in the annular gap open towards the top between the supporting bodies (2, 3), said filter cartridge (6) consisting of an annular base portion (17) and cover portion (18) having inlet and outlet holes (9, 10) and, if desired, rigid or flexible wall portions (11, 12) between the base and cover portions and filtering material (15) between the wall portions, through which the liquid to be filtered is pressed radially from one hollow space to the other (FIG. 3).

Abstract: A clamping connection unit for joining two hollow cylindrical pipes together is described. The unit consists of two abutting identically constructed coupling halves (1,2), an elastic O-ring (16) placed between them and a clamping connection (15) pressing the two coupling halves together. The clamping connection is in the form of a pipe clamp and is chamfered off on the internal surfaces of the clamping jaws to form V-shaped surfaces which slide down on similarly chamfered surfaces of annular ridges at the pipe ends to connect the two coupling halves together without leaving a gap.