Hi, this is little control in the housekeeper, today for everyone to explain why high limit flow depends on the measurement principle of mass flowmeter,

High accurate mass flowmeter, also known as the upper limit of flow meter of full flow or maximum flow, when we choose the calibre of the flowmeter should be used according to the measured pipe flow range and limit of selected flowmeter, flow and lower limit flow to configuration, can't simply according to pipe sizes with, generally speaking, a design of pipeline fluid is according to the economic flow rate to determine the maximum flow rate, if you choose is too low, pipe diameter, large investment will; High transmission power is big, to increase the operation cost, than like the low viscosity fluid such as water the economic flow rate of 1.5 ~ 3 m/s, 0.2 ~ 1 m/s high viscosity fluid, most of the upper limit of flowmeter flow velocity is close to or higher than pipeline economic flow velocity, therefore, flow meter when the choice of its diameter as same as the pipe is more, the installation is more convenient, such as different will not vary too much, usually adjacent to a specification, can be connected by reducer,

High accurate mass flowmeter its ceiling or limit of flow velocity restricted by their respective flowmeter measurement principle and structure, as a liquid flow meter as an example, the maximum flow velocity is minimum with glass float flowmeter, generally is between 0.5 ~ 1.5 m/s, the displacement meter between 2.5 ~ 3.5 m/s, vortex flowmeter is higher between 5.5 ~ 7.5 m/s, electromagnetic flowmeter is between 1 ~ 7 m/s, and even between 0.5 ~ 10 m/s, also need to consider the liquid limit velocity does not produce cavitation, because the flow rate is too high in the position of the cavitation is generally in flow velocity, the largest static pressure of the lowest position, in order to prevent the formation of air pockets, often need to control the minimum back pressure meter (maximum flow), should also pay attention to the upper limit of the flowmeter can not easily change,

Here, will continue to update, welcome attention!