GB/T590-2008 Cast iron stop valve 

    Stop Valve, also known as globe valve, is one of the most widely used valves. The popularity of the Marine Globe Valve is due to the small friction between the sealing surfaces when opening and closing, it is more durable, the opening height is small, it is easy to manufacture, and it is convenient to maintain. Not only for medium and low pressure, but also for high pressure. The closing principle of Marine Stop Valve relies on the pressure of the valve stem to make the sealing surface of the valve disc and the sealing surface of the valve seat closely fit, preventing the flow of the medium. The flow direction of the globe valve is from top to bottom, so it is directional during installation. The structural length of the globe valve is longer than that of the gate valve, and the fluid resistance is large. During long-term operation, the sealing reliability is not strong.