... Valve, China manufacturer, factory, mill, supplier, cheapCast Iron Check ValveHuachao Cast Iron Check Valves are designed and manufactured to ensure low ... product design and manufacturing criteria consistently result in the huachao cast iron check valve meeting a maximum of leakage prior to ... : 2 1/2" to 12"Pressure rating: class 125Material: gray cast iron, ductile cast ironEnd connections: flanged