Filter module

A filter module comprising:

• a housing;
• a bundle of semipermeable hollow fibers;
• a potting compound;
• and
• connecting caps,
• wherein:
• the housing comprises a central housing part and two housing end caps,
• the two housing end caps are attached to each end of the central housing part,
• each of the two housing end caps is formed in one piece,
• the bundle of semipermeable hollow fibers is arranged inside the housing,
• the housing comprises a first liquid chamber and a second liquid chamber,
• the first liquid chamber is formed within the bundle of semipermeable hollow fibers,
• the second liquid chamber is formed within the housing but outside the bundle of semipermeable hollow fibers,
• the potting compound is positioned in an end region of the central housing part and in a region of the two housing end caps,
• the potting compound forms a separating seal between the first liquid chamber and the second liquid chamber,
• the connecting caps are attached onto the two housing end caps,
• each of the two housing end caps has a cylindrical stub,
• the cylindrical stub is plugged onto the central housing part,
• the cylindrical stub transitions into an end-face end contour over a convex rounded section,
• the end-face end contour has a central through-opening that is axially extending,
• the central through-opening is lined by an annular rim,
• the annular rim is provided to receive the bundle of semipermeable hollow fibers,
• the annular rim forms an annular protrusion,
• the annular protrusion extends axially at least in a direction of the central housing part, and
• the annular protrusion forms a receiving area for the potting compound in an inner region of the convex rounded section between a circumferential receiving contour and the annular protrusion.