| 摘要 |
A rotary valve which is particularly useful in handling foodstuff or materials which will not tolerate cross-batch contamination, said valve including a housing having an inlet and an outlet which may be connected to a pneumatic conveying duct or the like, and having an access open end, a detachable closure mounted on said housing for closing said opening and, a drive shaft journalled in said housing having a free end disposed between said inlet and outlet, adjacent said closure, 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 outlet by rotating the drive shaft for conveying material from said inlet to said outlet, a first axial seal disposed between said housing and said rotor, and a second axial seal disposed between said rotor and said closure, in substantial longitudinal alignment with said first axial seal.
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