How to control the liquid levels in two tanks
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A pump feeds two tanks; how can the liquid levels in these two tanks be kept equal? A control valve can be installed on the feed pipe for each tank, and the liquid level in each tank can be controlled by its respective control valve. Is this a viable approach? Is the control effect good?
A connecting pipe can be installed between the two tanks.
A flow meter needs to be added, which increases the cost
Such questions are best discussed with images. There are many methods; I’m not sure which one is suitable for you, so it might be better to send an illustration.
I don’t know the required precision level; there are many control methods. Please let me know the requirements so we can discuss ways to save money
Since it’s not possible to add a connecting pipe, then each liquid level gauge and control valve must be used for control; theoretically, this works.
This post was last edited by 1111111 on 2018-8-4 at 16:12. 1. Measure the difference in liquid levels between tanks A and B. 2. Based on the magnitude of this level difference (–x to x), the instrument outputs a 4–20mA control signal. Note that what is meant here is not a linear transmission signal; this signal can be nonlinear. 3. The main flow pipe is divided into two branches to supply material to tanks A and B; there is a significant difference in the diameters of these pipes. A control valve is installed on the larger-diameter pipe. 4. The 4–20mA control signal mentioned above is used to regulate the opening degree of this valve. Thus, the opening degree of this valve determines the total flow rate, as well as the distribution of fluid between tanks A and B. For example, if the liquid level in tank A is lower than that in tank B, then the 4–20mA control signal will adjust the valve’s opening degree so that more fluid flows into tank A than into tank B; as a result, the liquid levels in both tanks will end up being equal. 5. To buy a Gaotai level difference gauge to achieve this is extremely simple – as simple as urinating a small amount of urine.