The invention relates to a valve (1) comprising a valve housing (4), in which housing a valve slide chamber (5) is formed that accommodates a valve slide (7). The valve slide (7) can occupy different switch positions, in which positions the valve slide can be releasably locked means of holding means (27). The holding means include a substantially ovoid spring element (45) which is bent exclusively two-dimensionally to obtain its shape and which is inserted into a spring chamber (35) that extends in a peripheral direction (34) around a portion of the valve slide chamber (5). The spring element (45) has two detent sections (53a, 53b) which can cooperate with detent arms (32a, 32b) of the valve slide (7) to releasably fix the valve slide in its switch positions.