a manifold assembly is provided for delivering flowable solid material , such as pelletized resin , for example , from a silo to a plurality of delivery pipes leading to extruding machines . the manifold is provided with gate valves for each delivery pipe , the valves being self - cleaning and easily controllable . a base portion of the manifold has a plurality of gated delivery tubes , while a top portion has at least one delivery tube of a larger diameter . circular mounting flanges with equally spaced bolt holes between the lower and upper portions of the manifold facilitate any desired relative orientation of the delivery tube of the upper portion with respect to those of the lower portion . also the upper portion has a circular flange for mounting in any desired position of index on a matching flange of a silo or hopper .