压力表用来准确地测量蒸汽锅炉上所需丈量部位压力的大小，也是保证设备和人身的平安以及经济运行的重要措施。压力表主要用以监视给水泵运行是否正常及测量给水母管压力。
1．蒸汽锅炉经常使用的压力表有：液柱式压力计：包括有v型管压力计、单管压力计、倾斜式微压计等。弹性压力计：单圈弹簧管压力计、多圈弹簧管压力计、膜盒式风压计等。远传式压力计：如电接点式压力计等。
Gauge steam boiler frequently used are: liquid column manometer: including v-tube manometer, single-tube manometer, inclined micro-pressure meter. Flexible gauge: lap Bourdon tube pressure gauge,multi-turn spring tube manometer, bellows pressure meter. Remote pressure gauge: If the electrical contact pressure gauge and so on.
2．弹簧管式压力表以弹性元件受压后的变形量来反映压力的大小。弹簧管式压力表主要由弹簧弯管、齿轮传动机构、示散装置（指针和分度盘）以及外壳等组成。
Bourdon tube pressure gauge to the deformation of the elastic element to reflect the pressure after compression size. Bourdon tube pressure gauge is mainly composed of a spring bends, gear transmission mechanism, showing scattered device (pointer and sub-dial), and shell and other components.
