Angle valve is also called triangle valve, angle valve, angle water valve. This is because the pipe is in a 90-degree corner shape at the angle valve, so it is called an angle valve, an angle valve, and an angle valve. The triangle valve is divided into two types: "cold" and "hot" according to the hot and cold. The valve body of the angle valve has three ports: the water inlet, the water volume control port, and the water outlet, so it is called a triangle valve. Of course, the current angle valve is constantly improving. Although there are still three ports, there are also angle valves that are not angular. "Cold" and "hot" (distinguished by blue and red marks), the materials of the cooling and heating triangle valves in the same model of the same manufacturer are mostly the same, and there is no essential difference. The main purpose of distinguishing between cold and warm is: cold and hot marks, mainly In order to distinguish which is hot water and which is cold water. Only some low-grade slow-opening triangular valves are rubber-ring spools, and the rubber-ring material cannot withstand 90-degree hot water, so it needs to be divided into cold and hot. "Quick open" and "slow open" two Kind. Quick opening refers to the rapid opening and closing of the valve at 90 degrees. Slow opening refers to the 360-degree non-stop rotation of the angle valve handle to open and close the valve. Now basically fast opening is used.