Profile: Hart Industries, Inc. provides hose assemblies, accessories, conveyor belt and tank truck related equipments. Our product line includes hydrolet, butterfly & hydraulic valves, hydraulic pumps, gauges, reducers and fusible caps. We also provide pumps, compressors and truck equipment. Our quick clean butterfly valve is low maintenance tank outlet equipment. The valve has increased flow capacities, with less pressure drop. The valve can be supplied with either 3" TTMA or 4" TTMA flanged connection, enabling it to be used to upgrade existing tank outlets. Our master control valve is a push button type on-off valve, spring loaded to the closed position. It is designed for use when the emergency valve air system is operated with air from the brake system.