PRESSURE REGULATING

In known pressure regulating apparatus, the pressure regulating valve placed in a holder is provided with a plunge-cut sealing groove for receiving a sealing ring. A filter is also disposed inside the pressure regulating valve. The novel embodiment of the pressure regulating apparatus is intended to make it easier to embody and install the seal between the holder and the pressure regulating valve. To avoid a plunge cut on the bottom part of the valve housing of the pressure regulating valve, the bottom part is provided with a step, defining one side of a sealing groove, while the sealing groove bottom is formed by a restriction extending as far as one end face of the bottom part. The sealing ring is defined on the other side by a ring, which is placed upon the restriction, and being connected with a filter disk extending radially inward and serves as a retaining means for the filter disk. Defining a sealing groove by means of a ring is applicable to other apparatus, in which a sealing ring is to be retained, as well.