Abstract: This invention relates to an orifice valve having a moveable gate to control the flow of solids in a closed conveying system. The invention encompasses a valve housing with two complementary valve sections, each of a unitary construction. A single plate is laser cut and bent to present a first planar surface, two opposed sidewalls and an end wall. The sidewalls include an integral flange section which presents planar surfaces that are placed in facing relationship with the planar flange surfaces of a second housing member so that the two form a closed cavity. A blade 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 is also integral with the housing section and is formed from the same plate stock as the first planar section, the sidewalls and the first end wall.

Abstract: A high-pressure gate valve for control of bulk materials includes a main body with an opening for passing bulk material, an upper body, a slidable blade, and lifting structure configured to raise the blade in a planar motion, perpendicular to the primary direction of travel and seal it against the upper body when the blade is extended. An actuating cylinder coupled with a rear edge of the blade extends and retracts the blade. A rear portion of the valve is enclosed to protect the rear edge of the blade, the actuating cylinder, and the coupling between the two.

Abstract: A high-pressure gate valve for control of bulk materials includes a main body with an opening for passing bulk material, an upper body, a slideable blade, and lifting structure configured to raise the blade in a planar motion, perpendicular to the primary direction of travel and seal it against the upper body when the blade is extended. An actuating cylinder coupled with a rear edge of the blade extends and retracts the blade. A rear portion of the valve is enclosed to protect the rear edge of the blade, the actuating cylinder, and the coupling between the two.