Function of top and bottom valves
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In the company’s pilot plant, I saw that one of the bottom valves on the reactor was a top-bottom valve. What is the function of a top-bottom valve? What are its applications? And what are the things to keep in mind when using it?
It can be used in industries such as chemicals, papermaking, and petroleum
Is it to prevent materials from depositing at the bottom of the tank?
Short neck, no material buildup. It is estimated that materials that do not flow can easily solidify or deteriorate (in the pharmaceutical industry). The opening of the bottom valve also has a very short neck, or no neck at all and is simply a flange surface.
According to the poster’s description, it should be an upward-opening discharge valve that is directly connected to the bottom of the reactor. In the closed position, the valve disc is essentially level with the flange, which helps to reduce dead zones at the discharge outlet and makes it less likely for material to accumulate there.
It is an upward-opening discharge valve; when closed, the valve core is at the same level as the bottom of the reactor, so no material accumulates inside the valve. Even if there is solid material at the bottom of the reactor, when the valve is opened, the valve core is pushed upward, clearing the passage and preventing blockage.
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