Bellows accumulator, in particular pulsation damper

A bellows accumulator comprising:

• an accumulator housing having first and second media chambers therein;
• and
• a bellows inside said accumulator housing separating said first and second media chambers from each other, said bellows having bellows folds movable at least partially along an inner wall of said accumulator housing, said bellows folds having an outer diameter slightly smaller than an inner diameter of an inner wall of said accumulator housing with interspaces being formed between said bellows folds and said inner wall forming a hydraulic damper for medium in at least one of said first and second media chambers, said interspaces having a size achieving a damping effect with medium being in a gap between outer free ends of said bellows folds and said inner wall of said accumulator housing and forming a sliding guide of said bellows folds in said gap, said gap has a gap width being between 3.0 mm and 0.15 mm in a radial direction transverse to a longitudinal axis of said bellows, said bellows having a length along said longitudinal axis of 1.0 to 1.5 times an internal diameter thereof in an extended state of said bellows, said outer free ends and inner free ends of said bellows folds being tapered in cross section radially outwardly and inwardly, respectively.