Definition:
Set of moving device that fitted into a closed conduit driven directly by water flow. Its turbine rotor rotates about the axis which is perpendicular to water flow.

Working Principles:
Water flow drives vane rotate. Rotating times which is proportional to water flow speed are gathered, hence total volume passed through water meter is recorded

Characters:
1.Type: liquid sealed
2.Wide measuring range, high accuracy
3.Stable measuring capacity
4.Long working capacity
5.Low pressure loss
6.All technical fugures are conformed with GB/T778.1-3-1996 which is equivalent to ISO4064 Standard B

Working Condition:
Water temperature ≤45℃ (Hot water meter ≤90℃)
Water pressure ≤1 Mpa

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%.)