Abstract: 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 has 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.

Abstract: A diverter valve for bulk solids is disclosed. The valve has a single inlet and two or more outlets, preferable three. Two pivotal gate valves are used for three outlets so that one is open and two are closed. The valve includes a novel pivotal gate structure which includes a resilient planar component sandwiched between two rigid planar components. The resilient component engages the valve housing so as to avoid metal to metal contact. The invention also includes a seal bar on each side of the housing which presents a linear surface that is perpendicular to the plane of the gate structure so as to present a firm surface against which the gate structure seals. The seal bars for each gate structure are discontinuous so as to accommodate positioning of the other gate structure in a smooth non-deformed sealing relationship to the housing. Additional seal bars engage the top and sides of each gate structure when moved to a “closed” position.

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.

Abstract: An iris valve for controlling the flow of bulk solid materials includes a flexible cylindrical sleeve, a control ring, and a polymeric isolator disc, all sandwiched between upper and lower body members. Rotating the control ring twists the flexible sleeve in an iris pattern to close an opening through the valve. Clamp bands attached to the upper body member and control ring include a machined helical pattern to securely grip the ends of the flexible sleeve, and a threaded handle locks the control ring in place against the body members.

Abstract: A gate valve for controlling the flow of a material is provided which has first and second flange assemblies oriented adjacent to one another. Each of the flange assemblies has an opening through which the material can flow. A pair of load seals are placed between the first and second flange assemblies and a pair of pressure plates are placed between the load seals. A blade is located between the pressure plates and has an opening therein which is sized similarly to the openings in the first and second flange assemblies. The blade is movable between an open position such that the openings of the first and second flange assemblies are aligned with the opening of the blade, and a closed position such that the opening of the blade is not aligned with the openings of the first and second flange assemblies so that material is prevented from flowing past the blade. The first and second flange assemblies are coupled together with a coupling mechanism operable without the use of any tools.