Stop valve
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Question: Given that a globe valve allows flow in only one direction, does this mean that both gases and liquids can only flow in one direction as well?
The normal function of a globe valve is to allow flow in one direction only; however, this does not mean that it cannot prevent backflow of the medium. Yet, if the pressure of the medium is too high, poor sealing may occur, which is determined by the structural characteristics of the globe valve. Its performance is basically similar to that of an eccentric butterfly valve with one-way sealing.
The globe valve, also known as a stop valve, is the most widely used type of valve. It is popular because it experiences low friction between its sealing surfaces during operation, is durable, requires little opening height, is easy to manufacture, and convenient to maintain. It is suitable not only for medium and low pressures but also for high pressures. The closing principle of a globe valve is that, through the pressure exerted by the valve stem, the sealing surface of the valve disc presses tightly against the sealing surface of the valve seat, thereby preventing the flow of the medium.