Is another liquid filled inside the magnetic flap level gauge on the ammonia tank?
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When I first came into contact with ammonia, I thought that beneath the large tank there must be liquid ammonia, while the upper part contained the gaseous form. But what is inside that magnetic flap pressure sensing tube? Anger? Liquid? I don’t know; I’d like to ask the experts!
It’s ammonia inside; once the liquid phase is opened, the ammonia will flow in
Inside a magnetic flip-type level gauge is liquid ammonia or ammonia gas (the part below the liquid level is liquid ammonia, while the part above the liquid level is gaseous ammonia). There is a magnetic float inside, and its specific gravity is lower than that of liquid ammonia; the position indicated by the magnetic flip plates, driven by this float, represents the liquid level.
What is displayed is the level of liquid ammonia. Liquid ammonia has a higher density than the float, so the float floats at the boundary between the gas and liquid phases; magnetic forces then cause the indicator to turn, thereby showing the exact liquid level
The part below the liquid surface is liquid ammonia, while the part above the liquid surface is gaseous ammonia
A magnetic flap level gauge is used to measure liquids
It is in a gas-liquid equilibrium state, with both liquid and gas present. If the upper pipe is not insulated, then the gas phase will constitute the majority; thus, the ambient temperature will heat the gaseous ammonia. Therefore, the entire level gauge (including the upper and lower connections) needs to be insulated; otherwise, the float may not be able to float. @jiaguoyun
The disk version relies on the principle of a communicating vessel; in simple terms, the liquid level shown is the same as that inside the storage tank, so there is both a liquid phase and a gas phase