How to choose the right industrial pressure gauge? Let's talk about the selection of common pressure gauges and diaphragm pressure gauges.
1, the process of production process requirements for measurement, including range and accuracy. In case of static test (or slow change), the maximum value of the measured pressure shall be set to two-thirds of the full-scale value of the pressure gauge; in the case of pulsation (fluctuation) pressure, the maximum value of the measured pressure shall be selected. One-half of the full-scale value.
2, on-site environmental conditions, such as ambient temperature , corrosion, vibration, humidity and so on. Such as vibration pressure gauge for vibration environment conditions.
3, the nature of the measured medium, such as the state (gas, liquid), temperature , viscosity , corrosion, degree of contamination, flammable and explosive degree. Such as oxygen table, acetylene table, with "oil ban" signs, dedicated to special media corrosion pressure gauges , high temperature pressure gauges, diaphragm pressure gauges .
4, suitable for staff observations. According to the location of the instrument and the lighting conditions, the meter with different size (dimensions)
In daily industrial production, all kinds of pressure gauges are also indispensable as a commonly used measuring instrument. There are many kinds of pressure gauges, there are pointer indication type and digital display type, function can also have a remote transmission, pressure data can be monitored when not in the field, and so on. Today we will talk about diaphragm pressure gauges .
Diaphragm pressure gauge in the measurement of medium pressure, the role of its principle is to set the isolation device in the pressure gauge periphery. The pressure of the medium is transmitted through the sealing fluid to the internal pressure gauge and an indication value is obtained.
Its characteristic is to work with media isolation. Diaphragm pressure gauges consist of a pressure gauge itself and specialized isolation devices. Diaphragm pressure gauges are a special category of products used in pressure gauges to measure specific media. Can measure strong corrosion, high temperature, high viscosity media.
At present, petroleum, chemical, chemical fiber , pharmaceutical, and other places that involve the measurement of fluids with special properties have common applications. Diaphragm pressure gauges have a wide range of applications in industrial production. Especially in high temperature, highly corrosive work environments, diaphragm pressure gauges play a very important role.
Diaphragm pressure gauge has a special isolation device, which avoids the accumulation of substances in the medium inside the pressure gauge. Therefore, the easy-to-crystallize, easily solidified liquid medium with solid particles can be measured using a diaphragm pressure gauge.
However, diaphragm pressure gauges inevitably have some disadvantages because of the pressure conduction through the sealing liquid. Therefore, the self-expansion of the sealing liquid at a high temperature will affect the indication value of the pressure gauge. When the temperature increases, the pressure felt by the pressure gauge will increase, which is more significant for a diaphragm pressure gauge with a low range.
　　 Diaphragm pressure gauge can adapt to a variety of harsh measurement environment, it works in isolation from the medium, it also has the characteristics of high precision, wide measurement range, large selection space, and diversified internal structure.
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