A rotary valve.

摘要

A rotary valve for dosing dry substances from one section of a system to another, during which pressure differences may arise, comprises a generally cylindrical housing (1), which is provided with a feed inlet (2) and a discharge outlet (3) and which is sealed at ends by means of covers (6, 9). A rotor (18) is accommodated in the housing (1), which rotor comprises a hub (19) rotatably supported by the covers and a plurality of blades (20) projecting radially from it, and extending substantially as far as the wall of the housing and the covers. The rotor can be driven from one end (21) projecting outside a respective one of the covers. Means (25-30) is provided between the housing and at least one of the covers (9) for guiding and supporting the cover (9) so that it is displaceable in the axial direction, relative to the housing, and so that it can also be swivelled in order to clear an opening (31) of the housing after the cover has been moved a sufficient distance from the housing.