To keep the pressure gauges sensitive and accurate, in addition to reasonable selection and correct installation, the maintenance and inspection of pressure gauges should be strengthened during the operation of boilers and pressure vessels. The operator should do the following for the maintenance of the pressure gauge
应保持洁净，表盘上的玻璃应明亮清晰，使表盘内指针指示的压力值能清楚易见，表盘玻璃破碎或表盘刻度模糊不清的压力表应停止使用。 1. The pressure gauge should be kept clean. The glass on the dial should be bright and clear, so that the pressure value indicated by the pointer in the dial can be clearly seen. The pressure gauge with broken glass or dial scales should be stopped.
2. The connecting pipe of the pressure gauge should be purged regularly to avoid clogging. In particular, pressure gauge connecting pipes for gases with a lot of grease or other viscous substances should be purged frequently.
3. Always check whether the rotation and fluctuation of the pointer of the pressure gauge is normal, and check whether the cock on the connecting pipe is in the fully open position.
4. The pressure gauge must be calibrated regularly, at least once a year by a qualified unit of measurement. After verification, the verification record and verification certificate shall be filled in carefully and sealed. Pressure gauges that have exceeded the inspection period should be discontinued. in
指示不正常或有其他可疑迹象，应立即检验校正. During the normal operation of boilers and pressure vessels, if it is found that the pressure gauge indicates abnormality or there are other suspicious signs, it should be checked and corrected immediately.