Superior Valve provides low pressure check valves to the petrochemical and power plant industries. Their over two dozen models come in carbon/stainless, cast bronze, ductile iron, carbon steel, stainless steel and cast iron materials. Types of low pressure check valves include short pattern wafer, threaded in-line silent, swing wafer single disc, wafer style dual disc, globe style flanged, wafer style mini, and silent center guided designs.