Problems with level gauges in high-pressure equipment
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What is the best type of local-level gauge to use on high-pressure equipment? For media that are relatively clean, such as in hydrogenation units, or for media that are quite viscous, such as in solvent deasphalting units.
I don’t know what the pressure is; the local level gauge uses high-pressure glass panels, with a maximum operating pressure of 25 MPa, while the magnetic flip-type level gauge has a maximum operating pressure of 16 MPa. It’s not easy to choose when the medium is quite viscous.
For high viscosity, level gauges made of steel strips can be used.
It’s better to use a differential pressure level gauge! High pressure can be avoided
High-pressure magnetic flap valves are problematic when it comes to measuring the level. Due to the small density difference between the phases, the float needs to be thin and light; moreover, it must have a thin wall while still being able to withstand high pressures, which makes it quite challenging.
I am using high-pressure glass plates (tubes). According to the specifications, the applicable pressure level for ordinary glass plates (tubes) is generally below 5.0 MPa. What are the structural differences between high-pressure glass plates (tubes) and ordinary ones? If there is a difference in thickness, could that lead to unclear interfaces? I decided not to use magnetic flip plates because the clients mentioned that they have a high failure rate; in most cases, they need to be replaced after just one year of use. The maintenance requirements are too high (by high-pressure here, I mean 42 MPa grade)