Rotating pressure distributor (1) for a carousel-type machine for treating hollow bodies in a plurality of identical treatment stations, comprising two rings, (2) fixed and (3) rotating, in sealing contact, the ring (3) having orifices (6) each adapted for being connected to a station and opening onto the contact face (5) thereof, the ring (2) having at least one aperture (7) which may be connected to a pressure source and opening onto the contact face (4) thereof by being on the trajectory of the orifices (6); grease is spread between the contact faces (4, 5) of the two rings (2, 3) to provide the seal; at least one annular channel (13) covers the annular opening (19) of the joint plane (P) and is connected to the atmosphere; in the channel respective flanges (14) are mutually interlaced without contact with one another, forming chicanes; the channel is filled with grease.