Key structure is made up of rotary carried helical blades which goes around as the same direction of water flow.

CHARACTERS:
1.Types: clock hands and numerical rolls (E type)
2.For hot or cold water;
3.Big vane structure;
4.Big flow capable, low head loss;
5.All technical figures are conformed with GB/T778.1~3-1996 which is to equivalent to ISO4064 Standard Class B.

WORKING CONDITION:
.Water temperature≤45℃(Hot water meter≤90℃)
.Water pressure≤1Mpa

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%.)