Sureflow Eqiupment Inc. designs and manufactures cast iron, silent check valves; stainless steel, wafer silent check valves; and cast iron, globe silent check valves. The three check valve types are available in 2" through 12" sizes, and 2" through 24" sizes. Used for municipal water systems, industrial class HVAC, industrial piping systems, and irrigation systems, the check valves feature vertical or horizontal installation and pressures of 150 psi, 200 psi, 275 psi, or 285 psi.