DEFINITION:Key structure is made up of rotary carried helical blades which goes around as the same direction of water flow.CHARACTERS:Removable structure, easy installation and maintenance.Dry type, magnetic drive.Measuring system fit for uniform use.An obvious advantage is that the pressure loss is less than 0.01MPa which is only 10% of rotating vane type.Cast iron body.Transmission device.Best choice for water supplying companies.WORKING CONDITION:Water temperature≤45ºC(Hot water meter≤90ºC)Water pressure≤1MpaMAXIMUM PERMISSIBLE ERROR:From the minimum flow-rate (qmin)inclusive to the lower zone of the transitional flow-rate (qt ) exclusive: ±5% .From the transitional flow-rate (qt ) inclusive to the higher zone of the maximum flow-rate (qmax ) exclusive: ±2%(hot water meter±3%.) .
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