ANSI Class 300 flanged gate valve WCB/CF8/CF3M specification 300 American standard flanged gate valve is a rising stem OS&Y stem gate valve. The main body is made of carbon steel and stainless steel. Turn the hand wheel clockwise downwards to close the gate valve; When the handwheel rotates the gate counterclockwise upwards, the valve opens.
ANSI Class 300 Gate Valve 
Class 300 refers to a gate valve pressure of 300 PSI
Chinese 300 level gate valve manufacturer 
Design standards: API 600, API 603, ASME B16.34 Face to face: ASME B16.10 Flange standard: ASME B16.5 Inspection and testing: API 598 Nuclear power source: 2 "-20" Main body materials: WCB, CF8, CF8M