Pressure gauge installation problem? Teach you to install the pressure gauge correctly

Pressure gauge is a commonly used measuring instrument, which is used to measure the pressure of liquid or gas in containers or pipelines. The accuracy of pressure gauge installation is closely related to good service life. The following is a guide on the correct installation of pressure gauges.

First of all, before installing the pressure gauge, it is necessary to confirm the specification and pressure range of the pressure gauge to ensure that it matches the use environment and can withstand the measured pressure.

Secondly, the installation location is also very important. The pressure gauge should be installed in the vertical part of the pipeline or container that makes the liquid or gas flow through it, so as to measure the pressure of the liquid or gas at this position. Before installing the pressure gauge, it is necessary to clean the pipeline or container to avoid impurities or blockages affecting the measurement.

Thirdly, the pressure in the pipeline or container will also affect the accuracy of the pressure gauge, so it is necessary to install noise reduction and decompression measures to avoid pressure fluctuation affecting the reading of the pressure gauge.

When installing the pressure gauge, it is necessary to ensure that it is closely connected with the pipeline or container, and the correct joints and seals need to be used. When fastening the joint, it is necessary to control the strength, not too tight or too loose, so as to avoid damaging the sealing pipe or causing leakage.

Finally, after installing the pressure gauge, it is necessary to test and calibrate the pressure gauge to ensure its accuracy and reliability, and check and maintain it regularly to avoid failure or damage.

How to choose a suitable pressure gauge manufacturer

Pressure gauges are mainly divided into two types, one is mechanical, and the other is electronic. Now let's talk about mechanical pressure gauges. Mechanical pressure gauges are divided into Bourdon tube pressure gauges, bellows pressure gauges, differential pressure gauges, diaphragm pressure gauges and so on. In our practical work, Wuxi Quanjun Instrument Co., Ltd. generally needs to confirm the following parameters:

I. Diameter of dial

The dial diameter means that we can default to the diameter of the casing of the pressure gauge. The stainless steel shock-resistant gauges are generally 50 mm, 63 mm, 100 mm and 150 mm (listed by European standards, China and some other countries will be a little different).

Pressure Gauge Manufacturer _ Stainless Steel Seismic Gauge _ Diaphragm Pressure Gauge-Wuxi Quanjun Instrument Co., Ltd.

Pressure gauge manufacturer

Second, the shell material

Generally, the shell materials of pressure gauges are ABS (engineering plastics), carbon steel, 304 stainless steel and copper alloy. We should choose the shell materials of pressure gauges according to the specific environment. Usually, diaphragm pressure gauges use ABS and 304 stainless steel.

Third, the connection mode

The connection mode of pressure gauge can be divided into axial (back connection) and radial (bottom connection), but in reality, customers can choose some options according to the specific situation. If it is panel installation, the axial direction can choose front flange edge or rear fixed bracket, and the radial direction can choose front flange edge or rear fixed edge and so on.

Fourth, the measuring medium

Generally, there are only two kinds of materials (standard) for liquid contact of pressure gauges, namely copper alloy and 304 stainless steel. If the medium you are measuring is not suitable for these two kinds or corroded, you can choose to use the pressure gauge together with the chemical seal (the role of the chemical seal is to effectively prevent the measuring medium from contacting the measuring element without affecting the pressure of the pressure measuring element, thus protecting the measuring element and prolonging its life).

V. Liquid filling

We found that there are many pressure gauges filled with liquids in some environments with relatively large mechanical vibration. In fact, the main function of these liquids is to increase the resistance and effectively prevent the pointer of the pressure gauge from constantly vibrating, so that we can read the pressure value accurately. Generally, it is commonly used near the pump or in an environment with severe vibration.

Six, the medium temperature

Generally, the measuring medium temperature of copper alloy measuring elements is +80 degrees, and that of stainless steel is +200 degrees; However, if the pressure gauge you choose is a liquid-filled shock-resistant pressure gauge, the medium temperature at this time can only reach +100 degrees; If the temperature is too high, but it must be earthquake-resistant, the way we adopt is condensation bend.

Seven, measuring range

Because the pressure gauge drives the pointer to rotate through the deformation of the measuring element, so as to display the pressure value, we should also pay attention when choosing the measuring range. Generally, it is ideal to measure the pressure at 3/4 or 2/3 of the measuring range of the pressure gauge. If you choose a large one, the pointer changes little, and the read pressure value will be inaccurate. If you choose a small one, the pressure gauge will be damaged due to overload.

Eight, the connection size

Now, due to the different thread standards in different countries, M (metric system), G (British system), NPT (American system), R (more used in Japan and South Korea) and so on are mainly used.

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