Instructions for using pressure gauges
Some important knowledge that must be mastered when using a pressure gauge.
If you don’t know the usage of the pressure gauge very well when you are using it, it should be difficult to guarantee its correct use. In many cases, its performance is very important to everyone’s usage, so I hope everyone will be able to use it. Strictly follow the correct method to operate, the following is some specific content.
The pressure gauge has reliable performance and good adaptability. At present, it is mainly used in petroleum, chemical, chemical fiber, dyeing, pharmacy and soda food industries to complete the measurement of the pressure of various fluid media on the pressure gauge. Some pressure gauges are specifically used to measure the pressure of liquids and gases that are highly corrosive, high viscosity, easy to crystallize, easy to solidify, or high temperature.
In addition, for the measurement of the pressure of some media containing particulate solid floating matter, it is often necessary to use a pressure gauge for detection. When the pressure of the measuring medium acts on the diaphragm, the diaphragm is deformed, compressing the sealing liquid of the pressure gauge pressure measurement system. Therefore, for a certain stroke pressure, if the rigidity of the diaphragm is small enough, and P is also small, the pressure of the diaphragm pressure gauge formed by the pressure measuring system of the diaphragm pressure gauge can be regarded as equal to the pressure of the measuring medium.
1, about the temperature characteristics of the pressure gauge:.
Since the sealing liquid is used inside the pressure gauge, and the sealing liquid is a medium that transmits pressure, when the temperature changes, it will cause the volume of the sealing liquid to change. In this way, when the pressure of the medium is actually measured, It is often affected by temperature, especially for pressure gauges with small ranges.
2, on the corrosion resistance of the pressure gauge:.
In the actual measurement operation, some working environments of shock-resistant pressure gauges may be corrosive, or the measured medium is corrosive. Then, at this time, it is necessary to use a pressure gauge with corrosion resistance. As far as the table is concerned, its corrosion resistance can be ensured by appropriately selecting the materials of the diaphragm, flange and sealing gasket in contact with the measuring medium.
3, about the connection form of the pressure gauge and the equipment:.
At present, when using pressure gauges, there are three main types of connection methods, namely threaded connection, flange connection and sanitary interface.
