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≤ 45º C(Hot water meter≤ 90º C)
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=1.6 |
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 |
| 25 |
7875 |
6300 |
80 |
126 |
78.75 |
100 |
100.8 |
63 |
| Nominal size DN(mm) |
Class of measurement |
Overload flow-rate q s (m/h) |
Permanent flow-rate q p (m/h) |
Transitional flow-rate q t (l/h) |
Minimum flow-rate qmin(l/h) |
| 15 |
B |
3 |
1.5 |
120 |
30 |
| 20 |
B |
5 |
2.5 |
200 |
50 |
| 25 |
B |
7 |
3.5 |
280 |
70 |
Overall dimensions and weight
| Type |
Size (mm) |
Length (mm) L |
Width (mm) W |
Height (mm) H |
Connecting Thread D |
Weight (kg) |
| LXSG(R)-13D1 |
15 |
110 |
77 |
80 |
G3/4"B |
0.57 |
| LXSG(R)-20D1 |
20 |
130 |
77 |
80 |
G1"B |
0.67 |
| LXSG(R)-25D1 |
25 |
160 |
77 |
80 |
G1 1/4"B |
0.91 |
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