Cast Steel Gate Valve Class 150 Class 150 Cast Steel Gate Valve Class 150 WCB Cast Steel Gate Valve Class 150 Stainless Steel Gate Valve API603 GATE VALVE Cast Steel Gate Valve Class 150/300/600 Class 150 Gate Valve Class 300 API603 Stainless Steel Check Valve 18 Inch Class 150 WCB Cast Steel Gate Valve Flanged Gate Valve API603