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. Best choice for water supplying companies.
   
WORKING CONDITION:
Water temperature¡Ü45ºC(Hot water meter¡Ü90ºC)
Water pressure¡Ü1Mpa
   
MAXIMUM 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%.) .