DEFINITION:
Key structure is made up of rotary carried helical blades which goes around as the same direction of water flow.
 
CHARACTERS:
Types: clock hands (C type),both clock hands and numerical rolls (E type),dry type(G type);
For hot or cold water;
Simple structure;
Big flow capable, low head loss;
All technical figures are conformed with GB/T778.1~3-1996 which is to equivalent to ISO4064 Standard Class B.

C type,E type,wet type.
For hot or cold water.
Simple structure.
Big flow capable, low head loss.

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%.)