⎝⎛星力捕鱼⎞⎠

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Flow meter series
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Level instrument series
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Industry Information
Selection of pressure gauge accuracy
2011-8-25 15:25:02

锅炉 工作压力小于2.5MPa 那么 压力表 精度不应 低于2.5 级; 如果 工作压力 要大于或者等于 2 If the working pressure of a boiler is less than 2.5MPa , then the accuracy of the pressure gauge should not be lower than 2.5 ; if the working pressure is greater than or equal to 2 . 那么 压力表 的精度不应 低于1.5 级; 如果 工作压力 大于 14MPa 的锅炉, 那么 压力表 的精度应为1 级。 For a boiler with a pressure of 5 MPa , the accuracy of the pressure gauge should not be lower than 1.5 ; if the boiler with a working pressure greater than 14 MPa , the accuracy of the pressure gauge should be level 1 .
锅炉实际工作压力选用压力表盘上刻度值,根据锅炉工作压力来选择压力表量程,量程刻度的极限值应 工作压力的1.5 3 之间 所以 最好是2 倍。 In actual operation , the scale value on the pressure gauge dial should be selected according to the actual working pressure of the boiler, and the pressure gauge range should be selected according to the boiler working pressure. The limit value of the range scale should be between 1.5 and 3 times the working pressure , so It is preferably 2 times.
      保证司炉人员能清楚地看到压力指示值, 选择 压力表 的直径大小 要适当 ,表盘直径不应 小于100mm In order to ensure that the staff can clearly see the pressure indication value, the diameter of the pressure gauge should be selected appropriately , and the diameter of the dial should not be less than 100mm . 一般高度达5m 的锅炉选用压力表的直径 要大于或者等于 200mm 高度 超过5m 时, 压力表的直径应 该大于或者等于 300mm For example , the diameter of the pressure gauge used for boilers with a height of 5m should be greater than or equal to 200mm ; when the height exceeds 5m , the diameter of the pressure gauge should be greater than or equal to 300mm . 高度较高 ,最好用内径10mm 的无缝钢管,从锅炉顶上压力测管接口处引下,到锅炉前方或 前侧离地1.7m 处,固定在锅炉外壳便于观察 ,同时 又便于定期冲洗操作 装卸更换压力表的位置。 If the height is high , it is best to use a seamless steel pipe with an inner diameter of 10mm , leading down from the pressure pipe connection on the top of the boiler, to the front or front of the boiler 1.7m above the ground, and fixed to the boiler shell for easy observation . At the same time, it is convenient for regular flushing operations , and the position of the pressure gauge is replaced.