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The NIBCO® cast iron gate valve features a Class 250 flanged, raised face end connection for easy installation and accessibility. Outside screw and yoke (OS&Y) gate valves are recommended when positive shutoff and a quick visual indicator of open/closed position is required. It is listed by Underwriters Laboratories (UL) at 350 PSI and FM Approved at 350 PSI. Please refer to NIBCO technical data sheets, chemical resistance guides and catalogs for engineering and installation information.