1. The maximum range (scale limit value on the dial) of the stainless steel micro-pressure pressure gauge installed on the boiler and pressure vessel should be compatible with the working pressure of the equipment. The range of the pressure gauge is generally several times the working pressure of the equipment. If the range of the selected pressure gauge is too large, the larger the range of the pressure gauge with the same accuracy, the greater the absolute value of the allowable error and the greater the deviation of the naked eye will affect the accuracy of the pressure reading; otherwise, if the selected stainless steel micro The range of the pressure gauge is too small, and the working pressure of the device is equal to or close to the scale limit of the pressure gauge, which will cause the elastic element in the pressure gauge to be in the largest deformation state for a long time, and it is easy to cause permanent deformation, which will cause the error of the stainless steel micropressure gauge to increase. Large and reduced life.
2. The accuracy of the working pressure gauge is expressed as the percentage of the tolerance on the dial scale. The accuracy level is generally marked on the dial. When selecting a pressure gauge, the accuracy should be determined according to the pressure level of the equipment and the actual work needs. Dial diameter In order to allow the operator to accurately see the pressure value, the diameter of the stainless steel micro-pressure pressure gauge should not be too small. If the pressure gauge is installed higher or far from the post, the diameter of the dial should be increased. If the medium used by the pressure gauge for measurement is corrosive, then different elastic element materials must be selected according to the specific temperature, concentration and other parameters of the corrosive medium, otherwise the intended purpose cannot be achieved.
3. Pay attention to daily use and maintenance. Regularly check, clean and keep a record of usage. Stainless steel micro-pressure gauges generally have a calibration cycle of half a year. Mandatory verification is a legal measure to ensure the reliable technical performance of pressure gauges, accurate transmission of values, and effective guarantee of safe production. In addition, the range of the pressure gauge is too small. In case of overpressure operation, the pointer will approach the zero position beyond the maximum range, which will cause the operator to have an illusion and cause a greater accident. Therefore, the working pressure range of the stainless steel micro-pressure pressure gauge should not exceed the scale limit.
