⎝⎛星力捕鱼⎞⎠

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How to choose the type of pressure gauge
2011-9-30 10:56:07

压力仪表 的时候 ,首先应 考虑被测介质的性质, 比如它的 温度的高低、黏度的大小、腐蚀性、易燃易爆性能等, 以便 选择相应的仪表。 When selecting a pressure instrument , the properties of the measured medium, such as its temperature, viscosity, corrosiveness, and flammable and explosive properties, should be considered first in order to select the appropriate instrument. 1 稀硝酸、酸、氨等腐蚀性 介质,可 不锈钢为膜片的防腐压力表 2 于容 易结晶、黏度大的介质应 选择用专用压力表 ( 1 ) For dilute nitric acid, acid, ammonia and other corrosive media, stainless steel can be selected as the anti-corrosion pressure gauge of the diaphragm; ( 2 ) For the medium that is easy to crystallize and has a large viscosity, a special pressure gauge should be selected . 如果 油进入氧气系统 易引起爆炸 氨对铜腐蚀性极强,不能采用铜合金材料制造的弹簧管,而 应该 采用碳钢 The oxygen pressure gauge is forbidden from oil. If the oil enters the oxygen system, it is easy to cause an explosion . Ammonia is very corrosive to copper. Spring tubes made of copper alloy materials cannot be used . Instead, carbon steel should be used . 测量硫化氢的压力仪表,采用钼不锈钢等抗腐蚀弹性材料。 The pressure gauge for measuring acetylene generally uses brass elastic materials, and the pressure gauge for measuring hydrogen sulfide uses anti-corrosive elastic materials such as molybdenum stainless steel.
    Second, consider the conditions of the site. 1 湿热环境。 ( 1 ) For hot and humid environments. 采用热带型压力表; 2 )对于 震动环境, 应该 采用抗振型压力表 3 )对于 易燃易爆环境, 应该 采用防爆型压力表 4 )对于 腐蚀性环境,则应 选用防腐型压力仪表等。 Tropical pressure gauges should be used; ( 2 ) For vibration environments, anti-vibration pressure gauges should be used; ( 3 ) For flammable and explosive environments, explosion-proof pressure gauges should be used; ( 4 ) For corrosive environments, it should be Use anti-corrosive pressure instruments .
    根据工艺对压力测量的要求,确定采用现场指示型仪表、远传指示型压力传感器或 是用于控制的压力变送器,从而 合理的 选择压力仪表的类型。 Finally, according to the requirements of the process for pressure measurement, it is determined to use on-site indicating instruments, remote transmission indicating pressure sensors or pressure transmitters for control, so as to reasonably select the type of pressure instrument.