Differential pressure transmitters are widely used in the industrial field, through which differential pressure transmitters can measure differential pressure measurement in liquid, gas, compressed air and fluid industries, and the use of differential pressure transmitters is of great significance to industrial automation production. The range of the differential pressure transmitter is generally very small, and in the process of installing and unloading the differential pressure transmitter, the differential pressure transmitter is subjected to one-way static pressure, which is easily damaged. For example, when the differential pressure we want to measure is 50KPa and the pressure in the pipeline is 1MPa, whether the positive pressure chamber or the negative pressure chamber is taken first, it will immediately cause the differential pressure on both sides to far exceed the set value. This is where we need a differential pressure transmitter in conjunction with a three-valve group. The three-valve group consists of a valve body, two shut-off valves and a balancing valve. First of all, open the two blowdown valves on the differential pressure transmitter, then open the balance valve, and then slowly open the two shut-off valves to remove the air or dirt in the impulse pipe, close the two blowdown valves, and close the balance valve, and the differential pressure transmitter can be put into operation. When it comes to unloading a differential pressure transmitter, the process is reversed. When the differential pressure transmitter is calibrated online at zero point, the differential pressure transmitter is also required to be used in conjunction with the three-valve group. The balance valve is opened first and the two shut-off valves are closed to perform a zero calibration of the differential pressure transmitter. When the whole plant has been running for a period of time, if the pipes need to be cleaned, the use of a three-valve group can also make the differential pressure transmitter unaffected by the entire cleaning process. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi: 400-600-4496!