The commonly used globe valve is used in the vacuum system, mainly to ensure a normal sealing form under the negative pressure state. Such as vacuum boilers, such as steam systems, such as vacuum gas and so on.
We all know that the globe valve is a low-in and high-out valve, and its sealing form is a conical structure. The general conical structure globe valve is suitable for ordinary water pipelines or steam pipelines, but the function of gas pipelines is not It is not big, because of the defects of the design structure, it will leak under the negative pressure state, but the unique structure of the vacuum shut-off valve can be strictly sealed under the negative pressure state, and can keep the sealing state when the normal fluid passes through. The valve is a vacuum valve.
The globe valve is a kind of convenient and fast cut-off valve which is driven by the screw rod to move the central shaft to rotate, lower or raise to open or close the cut-off medium. The main function of the system is that it can be sealed normally under negative pressure. For example, it can be closed or adjusted under normal use. For example, when it is a vacuum system in use, we should consider whether its sealing can be in the medium. Can it be completely sealed when it is introduced in the opposite direction? If it can be wiped and sealed during reverse flow, then it is a vacuum stop valve. If it cannot guarantee that the gas or liquid cannot be completely sealed during reverse flow, it is an ordinary stop valve. The types of globe valves are divided into manual, pneumatic, electric, and hydraulic. They mainly have a unique sealing form in terms of sealing performance, otherwise they are all ordinary shut-off valves.
