| 摘要 |
The present invention relates to a differential pressure regulator (1) having a lower part (2) and an upper part (3), the upper part being connected to the lower part. The lower part has an inlet (4) and an outlet (5). Between the inlet and the outlet there is a partition (6) with a valve seat (7), against which a valve body (8) acts at one end of a valve spindle (9), mounted in the upper part and actuatable in an axial direction by means of a biased compression spring (33) and surrounded by a membrane (30), which is fastened by means of a bead (27) all around between the upper part (3) and the lower part (2) and seals these parts against each other. According to the invention the coupling end (21) of the upper part (3) beyond a stop flange (20) in a direction towards the lower part is designed as an axially directed, annual projection (24), which at its free end forms a radially outwardly directed holding flange (25), enclosing a groove (26) all around, in which the membrane bead (27) is inserted. The fastening area of the membrane (28) is axially directed, i.e. mainly parallel to the insertion direction. A sealing is accomplished through a radial compression of the bead area (27) between an axial inner wall (18) of the coupling end (55) of the lower part and the bottom of the groove (26). The stop flange (20) acts against a step (19) in the coupling end of the lower part and a locking ring (23) rotatably retains the upper part on the lower part. |
