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:Types: Wet, dry, vertical, liquid sealed.Wide measuring range, high accuracy.Stable measuring capacityLong working lifeLow pressure lossAll technical figures are conformed with GB/T778. 1~3-1996 which is equivalent to ISO4064 Standard Class B.WORKING CONDITION:Water temperature≤45ºC(Hot water meter≤90ºC)Water pressure≤1MpaMAXIMUM 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%. )DN/QQ4=1.25Q3 Q3R=Q3/Q1Q2=1.6Q1 Q1R=Q3/Q1Q2=1.6Q1 Q1 l/h l/h l/h 15 31252500 80 50 31.25 100 40 25 20 50004000 80 80 50 100 64 40 Nominal size DN (mm)Class of measurementOverload flow-rate q s (m 3 /h)Permanent flow-rate q p (m 3 /h)Transitional flow-rate q t (l/h) Minimum flow-rate q min (l/h) 15 B 3 1.5 120 30 20 B 3 1.5 200 50 Overall dimensions and weightTypeSize (mm)Length (mm) LWidth (mm) WHeight (mm) HConnecting Thread DWeight(kg)LXSG(R)-13D4 15110/115 77 80 G 3/4"B 0.78LXSG(R)-20D4 20110/115/130 80 80 G 1"B 0.98
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