Advantages of orifice flowmeter:▲The structure of the throttling device is easy to replicate, simple, firm, stable and reliable, and has a long service life.▲Suitable for the measurement of larger diameter pipelines (currently, flow meters with a diameter greater than DN600mm generally can only use orifice plates);▲Durable;▲Comprehensive calibration;▲The price is cheap.Disadvantages of orifice flowmeter:▲The installation requirements for throttling device, pressure pipe and condensing tank are very high, and the installation is more complicated.▲It is difficult to calibrate the orifice flowmeter as a whole. At present, we can only calibrate the differential pressure sensor, pressure sensor, and temperature sensor separately, and it is difficult to ensure the overall accuracy.▲The structure of the orifice plate determines that when the fluid flows through the orifice plate, the static pressure of the fluid is significantly reduced, and the flow rate is significantly increased, which causes the fluid to wash the orifice plate seriously, erode the sharp metal edge in the center of the orifice plate, and cause the accuracy of the orifice plate to decrease continuously. . In the flow measurement of liquids that are easily vaporized such as liquefied gas and propylene, the change in the physical form of the fluid causes more serious erosion of the orifice plate.▲The structure of the orifice plate causes a large static pressure loss after the fluid flows through the orifice plate. On the whole, the orifice plate flowmeter is an energy-consuming instrument, which increases the mechanical power loss of the pump. Conducive to the improvement of the energy efficiency of the device, it is an unfavorable factor for the increasingly stringent energy saving requirements.
Post time: 21-09-21