The principle of the delta, meter scale and structure

Abstract: the delta and the principle and structure of information flow meter scale produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Measuring principle and delta flowmeter were using the working principle of differential pressure type, plug-in installation method, the design of the generated a flow sensor. Take pressure method is through a diameter of about 20 mm probe ( Or probe) Two rows, before and after the probe is uneven. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the delta meter scale details the principle and structure of the article. Measuring principle and delta flowmeter were using the working principle of differential pressure type, plug-in installation method, the design of the generated a flow sensor. Take pressure method is through a diameter of about 20 mm probe ( Or probe) , there are two rows of uneven distribution of probe around, several 8 mm hole. Through the second hole will be pipeline (from top to bottom / from left to right) The different pressure ( / velocity) In the hole by averaging, Because the pipeline on both sides of the flow velocity is slow, fast) among Constitute the differential pressure and mass flow or volume flow rate can be calculated. Scope 1, nominal pressure: 25 mm & le; DN≤ 6000 was, nominal pressure: PN≤ 25 mpa3, medium temperature: t≤ 650 ℃, precision grade: 0. Level 2, 0. Level 5, 1, 1. Level 5 detail pipe low power loss, Loss of pressure small) : usually velocity-equalizing tube pressure loss is much smaller than orifice, only 5 to 10% of the orifice plate; On the other hand, due to the loss of pressure is small, can bring the differential small ( High pressure and low pressure differential) , making the choice for higher differential pressure transmitter, cost, or you will make the output of the transducer precision drops, because unable to achieve the full scale range. So a good detector must be balanced with loss of pressure and differential pressure two aspects. Delta fully into account the factors of surface design, section itself is symmetrical, curved surface is divided into three parts, The diagram below) , right against the face part is smooth, smooth probe in contact with the medium; The second part is the acceleration section, three times the average speed of medium velocity, by increasing the contact area of with the media, raise the pressure head on segment; The third part is the boundary between high and low voltage spike, resistance to disappear suddenly, behind the probe form the low pressure area, the actual color spectrum can fully reflect the change of medium velocity. So, the delta of the probe design can meet the small loss of pressure and differential pressure big request. High precision: after the third party test, and according to zui new data show that although in a relatively short straight pipe, also can achieve the accuracy of 2%. Reach 1% accuracy of straight pipe much shorter than the general products, the following figure. Repeatability is 0. 1%. Because of the small pressure loss, and to probe the wear small, as long as the appropriate installation, to be able to maintain high precision for a long time. Low operating costs: due to the loss of pressure is small, makes the power loss in the pipe is small, usually sense, velocity-equalizing tube running cost is only one over ten of the orifice plate. Installation: small amount of work for the sensor is plug-in works, have installer makes, the characteristics of simple. For most sizes just open a small hole in the pipe. According to many years of experience in installing, opening need 5 minutes, the welding probe casing for 20 minutes, insert the fixed probe for 10 minutes, three valve group for 5 minutes, 10 minutes with differential pressure transmitter, wiring for 10 minutes, the whole process only about 60 minutes ( Integration) 。 Integration/fission installation free choice: the delta of the probe is a full sense of the integration of the probe, regardless of the measured medium is a gas or liquid, or high temperature of superheated steam, differential pressure sensor, the temperature and pressure can be measured and differential pressure transmitter installation on a probe, the probe and the connection between differential pressure to have more than 10 kinds of ( Choose) , specifically for the superheated steam condenser, is used to directly connect the transmitter elliptical flange, also has a simple R1/2 & Prime; External thread, and provide all kinds of connection of fission installation/integration, can meet various needs. As for superheated steam, most product requirements fission installation, users have to match the condenser and other accessories. And German Barbara along with condenser, cut-off valve or ball valve are provided, along with all the safe and reliable, simple and feasible, is the real integration of the probe. Hole big not easy blocking: for flue gas or gas/liquid particles with measurement, plugging problem is a problem concerned by most users. If the dust in the medium is not more than 130 mg/m3, do not need to undertake any maintenance for the delta of the probe and purging. From the perspective of fluid mechanics, the wedge of any shape in the fluid, fluid accumulation in the front, the pressure increased, after the wedge pressure decreases, and the movement of dust no matter how high pressure, low pressure how small, will likely into the hole of the wedge. Due to Brownian motion in static fluid, the dust will enter the wedge in the inner hole. So the question is not high and low pressure, nor in any kind of cross section, which is how to let the dust out, do not pile up. There is no doubt that regular purging is a solution. My company in the holes on the distribution and the aperture of the probe to do a lot of research, large aperture ( 8 mm) Foreign body easy and also easy; Up and down two hole edge closer to the probe ( Pipe edge) , foreign body not easy accumulation. Aperture small, will no doubt cause it's not easy to into, also not easy, in is absolute, how much is only a matter of time. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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