Low temperature shut-off valve

Low temperature globe valve refers to a globe valve in which the valve body, valve cover, valve disc, valve seat, valve stem and other overcurrent components are made of materials that have undergone special low-temperature treatment. Low temperature treatment requires placing the globe valve material in liquid nitrogen at a temperature of -196 degrees Celsius for nitriding treatment. After soaking for a certain period of time, the metallographic structure of the material is thoroughly adapted to a low-temperature environment of -196 degrees Celsius. Low temperature globe valve is a type of forced sealing valve with an extended stem. When it is closed, pressure must be applied to the valve disc to ensure that the sealing surface does not leak. When the medium enters the valve from below the valve disc, the force required to close the valve is greater than that required to open the valve, so the diameter of the valve stem also needs to be larger than that of a typical valve, and it needs to be specially lengthened to prevent freezing. The opening and closing component of a globe valve is a plug shaped valve disc, which moves linearly along the centerline of the valve seat and achieves opening and closing through the movement of the valve stem.