Segmented installation of remote transmission magnetic flap level gauge
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There is a storage tank with a height of approximately 7.5 m. The equipment manufacturing drawings specify 4 flange connections with a flange spacing of 3.6 m each; the nominal diameter of these flanges is DN25. It is planned to install 2 remote-type magnetic flap level gauges with a flange spacing of 3.6 m between them, with measurement ranges of 0–3.6 m and 3.6 m–7.2 m respectively. In this case, if the liquid level is at 5m, would a remote-type magnetic flap level gauge with a range of 0-3.6m be outside its specified range? Will this have an impact on its transmitter at this time? I need some advice.
It won’t have any impact; it will just show that the 3.6-meter glass panel is full. The remote transmission of the magnetic flap is merely a detection of the position of the internal magnetic float.
There’s no need for a direct connection for deities and demons; the level gauge in my gym is 15 meters long in total, and there’s no separate measurement taken
Long ones have high manufacturing and transportation costs. If you’re using a 15m magnetic flap valve, why not go with a split-type ultrasonic one? Or use a radar level gauge?
There should be no impact; 0–3.6 meters display 100%
The transmitter will output 20mA at full scale; in this case, just look at a transmitter with a 7.2m range
If it weren’t for the fact that magnetic flip plates are too heavy, such as high-pressure magnetic flip plates – they are simply too heavy! The regular ones don’t require segmentation; another reason is that the originally imported magnetic flip plates are too long to be transported!
I don’t like them either. It is said that their accuracy over long distances is not high, except of course for magnetostrictive transmitters
Is it necessary to repeat important things three times? . . ! ! !
Let me answer your question first: the liquid level is at 5m, which means that the magnetic level gauge is showing a reading of 3.6–7.5m; it has not exceeded the range. Both of these magnetic level gauges are independent units, with each one having its own float at 3.6m. Moreover, the remote transmission is based on float sensing, with an accuracy of plus or minus 10 mm. As long as there is a level display and the float is moving, there’s no problem. 1. First of all, a 7.5m tank can be fully equipped with a magnetic flap level gauge with an L=7.5m length, and transportation is no problem either. 1. Logistics are available to deliver the goods to the site. 2. If a segmented approach is to be used, it is likely that the simplicity of installation is taken into consideration at the site; 7.5m is considered too long and makes installation difficult. It becomes much easier if it is divided into 2 units of 3.6m each. 3. When a segmented approach is used, if the two sections are connected directly on site, there will definitely be a blind spot in between; that is, there is an error range of around 10-30 centimeters at the 3.6m mark, both above and below. 4. Nowadays, to avoid blind spots in segmented systems, offset installation is used; that is, the center of the flanges for the 0–3.6 m range and the 3.6–7.5 m range must be on the same plane.