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 capacity
Long working life
Low pressure loss
All 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≤1Mpa
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%. )
| DN/Q |
Q4=1.25Q3 |
Q3 |
R=Q3/Q1 |
Q2=1.6Q1 |
Q1 |
R=Q3/Q1 |
Q2=1.6Q1 |
Q1 |
| l/h |
l/h |
l/h |
| 15 |
3125 |
2500 |
80 |
50 |
31.25 |
100 |
40 |
25 |
| 20 |
5000 |
4000 |
80 |
80 |
50 |
100 |
64 |
40 |
| Nominal size DN (mm) |
Class of measurement |
Overload 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 weight
| Type |
Size (mm) |
Length (mm) L |
Width (mm) W |
Height (mm) H |
Connecting Thread D |
Weight(kg) |
| LXSG(R)-13D4 |
15 |
110/115 |
77 |
80 |
G 3/4"B |
0.78 |
| LXSG(R)-20D4 |
20 |
110/115/130 |
80 |
80 |
G 1"B |
0.98
|
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