的安装 Installation of differential pressure transmitter
变送器 和差压源之间的导压管的长度越短越好，一般在3m到50m之间，内径要大于8mm ；导压管要保持大于1:10的倾斜度，即两端高度差为1m时，水平方向敷设10m 。 The shorter the length of the pressure guiding tube between the differential pressure transmitter and the differential pressure source, the better, generally between 3m and 50m , and the inner diameter should be greater than 8mm ; the pressure guiding tube should maintain an inclination greater than 1:10 , that is, When the height difference between the two ends is 1m , lay 10m horizontally. The slope of the pressure guiding pipe should meet:
）当介质为气体时，变送器安装位置要高于压源，才能使气体中的冷凝胶自动顺着导压管流回工艺管道或者设备中；如果在实际安装中做不到这一点，应该将液体收集器和排液阀门安装在导压管路的最低点。 ( 1 ) When the medium is a gas, the installation position of the transmitter must be higher than the pressure source, so that the cold gel in the gas can automatically flow back to the process pipe or equipment along the impulse tube; if it cannot be done in actual installation At this point, the liquid collector and drain valve should be installed at the lowest point of the pilot line.
）当介质为液体时，变送器安装位置要低于取压源，才能使液体中析出的气体顺着导压管流回工艺管道或者设备中，如果做不到这一点，应该将气体收集器和放气阀门安装在导压管路地最高点 ( 2 ) When the medium is liquid, the installation position of the transmitter must be lower than the pressure source, so that the gas precipitated from the liquid can flow back to the process pipe or equipment along the impulse pipe. If this is not possible, the The gas collector and bleed valve are installed at the highest point of the pilot line
差压变送器 In short, pilot pressure lines and differential pressure transmitters The slope and direction of the pressure-conducting pipeline must exist, and only a single-phase medium, such as a gas phase or a liquid phase, can prevent additional errors and ensure the stability of the measurement.
） 当介质为蒸气时，在导压管路中应安装冷凝容器，是为了防止差压变送器因高温蒸气进入而损坏。 ( 3 ) When the medium is vapor, a condensing container should be installed in the pressure guiding pipeline to prevent the differential pressure transmitter from being damaged due to the entry of high temperature vapor. When installing the condenser, make sure that the condensate levels in the two impulse pipes remain at the same level for a long time. The pressure-conducting pipeline from the condensing container to the transmitter should be laid according to the requirements when the measured medium is liquid.
） 当介质为有腐蚀性时，为了防止差压变送器被腐蚀，应安装相应的隔离设在导压管路中备。 ( 4 ) When the medium is corrosive, in order to prevent the differential pressure transmitter from being corroded, corresponding isolation should be installed in the pressure-conducting pipeline. 液相转换温度低，易聚合等状况下，也应采取相应的隔离设备，以防导压管被堵塞。 When the measured medium has a large viscosity, it is easy to precipitate or crystallize, the gas / liquid phase transition temperature is low, and it is easy to polymerize. Therefore, corresponding isolation equipment should be adopted to prevent the impulse tube from being blocked.