First, the use of mass flow meter installation
(1) Routine points The distance between the sensor and a large transmitter or motor must be at least 0.6m. Because the sensor works depends on the electromagnetic field. Therefore, it must be avoided to install the sensor near a large interference electromagnetic field. In addition, you should carefully select the installation location to avoid vibration.
(2) Installation position when measuring liquid The installation of the sensor should ensure that the liquid is full. In order to reduce the impact of density changes on the accuracy of the measurement. When the process piping needs to be cleaned, the installation position should ensure that the liquid is completely drained. In order not to collect gas inside the sensor. Avoid installing the sensor at the highest end of the piping system.
(3) When measuring the gas, the mounting position is such that the liquid inside the sensor does not collect, and should be installed at the low point of the pipe.
(4) The direction of the installation process and the location of the process piping already laid out determine the orientation of most sensors.
Although the installation angle of the sensor does not affect the operation of the flowmeter. However, the following recommendations should be considered as much as possible:
(a) When measuring liquids. The sensor housing should be mounted downwards to prevent air from collecting in the flow tube:
(b) When measuring gas. Sensor housing should be installed upwards. To avoid condensation in the flow tube:
(C) When measuring the liquid slurry, the sensor should be mounted vertically, like a flag, to prevent particles from accumulating in the flow tube. The process medium should flow from bottom to top to avoid spouting empty tubes.
(5) Whatever the direction of flow is. The sensors can accurately measure the flow. The arrow on the general sensor indicates the normal flow of the fluid.
(6) The valve is used to make the flow meter zero. A stop valve should be installed downstream of the sensor. For ease of batch operation. The sensor and stop valve should be as close as possible to the receiving container. No hose should be installed between the sensor and the shut-off valve. Avoid batch errors caused by expansion or compression. In addition. A regulating valve can be installed downstream to prevent vaporization or evacuation of the medium.
(7) Gas-liquid two-phase flow such as process medium produces gas-liquid two-phase flow. The sensor housing should be mounted downwards. Or installed on a vertical pipe. This installation method can effectively prevent the gas in the medium from accumulating in the flow tube.
(8) Load and unload metering in load and unload metering applications. The sensor housing should be installed facing upwards or vertically. A one-way valve should be installed downstream of the sensor to prevent backflow of the medium. The check valve should be installed as close as possible to the sensor. In some cases, the process media can not be completely excluded from the pipeline, flag-type installation is generally recommended at this time. When loading or unloading applications, you should try to follow the following driving steps:
(a) Install stop valves upstream and downstream of the sensor:
(b) Close the upstream valve:
(C) Opening part of the downstream valve:
(d) Slowly open the upstream valve to vent air and fill the sensor with media:
(e) When the flow system starts to measure. Slowly open the downstream valve until it opens completely.
Two in sodium carboxymethyl cellulose (CM C)
The use of production in the key process of the production of toothpaste grade carboxymethylcellulose sodium - alkalinization reaction, the precise amount of chemicals used to participate in the reaction need to be controlled. To ensure product quality. After a lot of examination and comparison. We finally selected a Fisher-Rosem ount R-type mass flow meter to measure the quality of hydrochloric acid, concentrated alkali, and alkalinizing solutions. According to the above installation principle. We install 3 sets of flowmeters.
In the trial run. It was found that there was an error of about ± 5% between the measured hydrochloric acid and the empirical value of the process. Installation schematic as shown.

After careful inspection, we found that the hydrochloric acid added during trial production was less than normal production. In the case of the full-opening valve at the rear of the mass flowmeter, hydrochloric acid could not completely fill the medium, affecting the instrument measurement. Slightly close the rear shut-off valve and retest. The results match the experience of the process. After normal production, the globe valve is fully operational. The production operation results in the past 8 months show that the mass flowmeter measurement is accurate and reliable, maintenance-free, and gives full play to the monitoring functions of automated instruments. Fully meet the high quality requirements of the company.

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