Magnetic flap level gauge for vacuum tanks; the medium cannot enter the level gauge.
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Question 1: May I ask how this should be handled? Or which practical instrument should be replaced? Question 2: A vacuum is created in the mirabilite crystallization tank; why is the differential pressure level gauge from E+H continuously giving inaccurate readings? No material was added during the process, and the liquid level showed a slow upward trend. How should it be handled? Or replace the gauge?
There is another tank that uses a single-flange differential pressure level gauge; the medium used is sodium persulfate. The valve in front of the gauge always crystallizes, and the sensing surface of the gauge is constantly covered with dirt. There is stirring inside the tank; the material enters the front valve. Although the stirring continues, it is ineffective. It will still crystallize; what should be done? Without adding steam? I’m tired of having to take it apart and clean it so many times. The table is from E+H.
This post was last edited by 1111111 on 2020-1-23 at 19:32...........................
I posted it in the wrong place. Sorry! Wish you a happy New Year!
I posted it in the wrong place. Sorry! Wish you a happy New Year!
I posted it in the wrong place. Sorry! Wish you a happy New Year!
1. The flap-type level gauges used for vacuum equipment on-site are perfectly fine; we have been using them, and even at pressures as low as -90 KPa, there are no issues. The owner needs to confirm whether the root valve is open or blocked, whether the float has too high a density and thus cannot rise, or whether the medium crystallization has caused the float to get stuck, etc. 2 The differential pressure method for measuring liquid level in a high-vacuum environment doesn’t work well; there are posts on the forum about this. It’s acceptable if the vacuum level isn’t high, but it will also affect the service life.
The magnetic flap medium can’t enter or exit; it’s probably because one of the upper and lower connection pipes is blocked
Try to add backwashing and flush it regularly.
1. A magnetic flap level gauge is used for vacuum tanks; if the tank is relatively small, the float can be easily drawn upward, resulting in inaccurate readings. I don’t understand your manufacturing process; is it feasible to use glass sheets directly? Or use a hollow float. In your current situation, the gap between the float and the pipe wall is too small; it’s like a piston that is drawn upward by the vacuum. 2 Are you using a flange diaphragm type? This kind of thing is very unstable when used in a vacuum. Especially the capillary type is even less useful. A differential pressure transmitter with 1/4 inch ports can be used directly. If no crystallization occurs inside the tank, an insert-type pressure transmitter will suffice. It’s the type where the flange face extends 20 or 30 centimeters into the tank, and it can be customized.