Flow meter and installation method shall be select

The flowmeter and installation method used for measuring steam

rotor flowmeter, electromagnetic flowmeter, turbine flowmeter, etc. cannot be used to measure steam. Orifice flowmeter was used to measure steam in the past. Now more and more people choose vortex flowmeter

vortex flowmeter is characterized by small pressure loss, large range and high accuracy. It is almost unaffected by fluid density, pressure, temperature, viscosity and other parameters when measuring volumetric flow under working conditions. There are no movable mechanical parts, so the reliability is high and the maintenance is small. The instrument parameters can be stable for a long time. Vortex flowmeter adopts piezoelectric stress sensor, which has high reliability and can work in the working temperature range of -20 ℃ - +250 ℃. The capacitive vortex flowmeter can be made above 250 degrees. It has analog standard signal and digital pulse signal output. It is easy to be used with digital systems such as computers. It is a relatively advanced and ideal measuring instrument. The vortex flowmeter is equipped with temperature and pressure compensation, and the temperature and pressure integrated vortex flowmeter makes the measurement of steam more stable and reliable

then what are the characteristics of the steam until the sample is damaged by the vortex flowmeter:

1. The temperature and pressure compensation function is integrated in the table body at the same time, which can measure the standard volume flow or standard mass flow of the fluid

2. Fully intelligent and digital circuit design, which can automatically compensate the calculation of measured fluid density or standard condition volume

3. The new digital filtering and correction functions make the flow measurement more accurate and reliable

4. Battery powered type can work continuously for more than two years without external power supply

5. All 2. Basic performance of Jinan assay fixture. The new dot matrix Chinese character LCD is more convenient to use and operate

what should be paid attention to in the installation of vortex flowmeter for measuring steam flow meter:

(1). The flow sensor can be installed indoors or outdoors, avoiding high-voltage lines, rotating machinery and equipment, toxic and harmful environments, strong mechanical vibration and other environments that endanger personal and instrument safety, as well as temperature and humidity environments that are inconsistent with the service conditions of the flow sensor. The axial tension applied in each safety test is 40MPa, 80MPa, 120MPa, 160MPa, 200MPa, 240mpa and 280mpa respectively, which is convenient for installation, commissioning and maintenance and has a better environment

（2）。 When designing the installation position of the flow sensor, in addition to considering the conditions of the straight pipe section, enough operation space should be reserved around the flow sensor to facilitate installation, commissioning and maintenance. In particular, a safe and convenient operation space should be reserved for people. When the instrument is installed at high altitude, an operation platform shall be made to ensure the safety of people operating at high altitude

（3）。 The flow sensor can be installed on horizontal, vertical or inclined pipes. However, when measuring liquid, the flow sensor installed on the vertical or inclined pipeline must ensure the flow direction of liquid from bottom to top, so as to ensure that the pipeline is full of liquid and offset the impact of additional gravity

（4）。 The upstream and downstream of the flow sensor should have a long straight pipe section, and the size of the straight pipe section varies according to the upstream pipe type

（5）。 The inner diameter of the pipe where the flow sensor is installed must be consistent with the inner diameter of the flow sensor. Otherwise, the upstream and downstream pipelines where the flow sensor is installed shall be reduced. The principle of selecting pipe diameter is that the inner diameter of the pipe must be consistent with the nominal inner diameter of the flow sensor. The relative error of the two inner diameters should be controlled within ± 1%. On the premise of ensuring the compressive strength, the nominal pressure should be as large as possible