ORIFICE VALVE FOR BULK SOLIDS

摘要

This invention relates to an orifice valve (10) having a moveable gate to control the flow of solids in a closed conveying system. The invention encompasses a valve housing (12) with two complementary sections (18), each of a unitary construction. A single plate is laser cut and bent to present a first planar surface (20), two opposed sidewalls (24) and an end wall (28). The sidewalls (24) include an integral flange section (26) which presents planar surfaces that are placed in facing relationship with the planar flange surfaces of a second section (18) so that the two form a closed cavity. A blade (40) is received in the cavity and is reciprocal between open and closed positions so as to accommodate the flow of material or to block the flow. Appropriate retainers hold the two sections in place. In the preferred embodiment a second end wall (30) is also integral with the housing section (18) and is formed from the same plate stock as the first planar section, the sidewalls (24) and the first end wall (28).