Introduction to the Selection of Precision Grades for Pressure Gauges

1. What is a pressure gauge?

The pressure gauge is a universal measuring instrument, which is widely used in various fields. It can visually display the pressure change of each process link, observe the condition formation in the product or medium process, monitor the safety trend in the production and operation process, and establish fast and reliable safety guarantee through automatic chain or sensor device, plays an important role in preventing accidents and ensuring the safety of people and property, and is called "safety eye".

Ⅱ. The selection of pressure gauge accuracy

1. The range of pressure gauge China installed on boilers and pressure vessels should be suitable for the working pressure of the equipment. The range of the pressure gauge is generally 1.5 times the working pressure of the equipment, and the pressure gauge is 2 times that of the equipment.

When the range of the pressure gauge is too large, the larger the range of the pressure gauge, the greater the deviation between the allowable error value and the visual observation, the larger the range of the pressure gauge, the greater the allowable error value, the greater the deviation observed by the naked eye, and the greater the visual observation The greater the allowable error value of, the greater the deviation observed by the naked eye. This will affect the accuracy of pressure readings.

2. The accuracy of the working pressure gauge is expressed by the percentage of the allowable error in the limit of the scale, and the accuracy level is generally indicated on the scale. When selecting a pressure gauge, the accuracy of the pressure gauge should be determined according to the pressure level of the equipment and actual work needs.

3. In order to enable the operator to see the pressure value accurately, the dial diameter of the pressure gauge should not be too small. If the pressure gauge is installed higher or farther from the column, the dial diameter should be increased.