Rotary valve

A valve comprising a housing including an inlet, an outlet and an access open end, a detachable closure means mounted on said housing for closing said open end, a drive shaft journalled in said housing having a free end disposed between said inlet and outlet, adjacent said closure means, a rotor mounted on the free end of said shaft having an annular surface engageable with said housing, said annular surface having at least one recess communicable with said inlet and said outlet by rotating the drive shaft for conveying material therebetween, a detachable sealing assembly mounted on said housing in sealing engagement with said shaft, between the journalled portion of said shaft and said rotor, said sealing assembly comprising a sleeve removable mounted on said shaft, a mounting member detachably secured to said housing and having a bore for receiving said shaft mounted sleeve therethrough, said mounting member bore having an enlarged section, packing disposed in said enlarged bore section between said mounting member and said shaft mounted sleeve, and means for compressing said packing, causing it to expand radially and provide a seal between said mounting member and said shaft mounted sleeve, a first axial seal disposed between said housing and said rotor, and a second axial seal disposed between said rotor and said closure means, in substantial longitudinal alignment with said first axial seal.