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:
Liquid sealed.Keeping surface clear for long.
Smaller body, lighter weight.
Low start flow.
Fit for low quality water.
Painted available as demanded.
Class C.

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 transitionalflow-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%.)