DS78TBR-E is an inferential, multi-stream, wet dial, straight reading type meter for cold water, and it’s suitable for domestic use. Brass body, internal mechanisms are made from wear-resistant, waterproof, antimagnetic and antiscaling plastic material. No leak, mechanical transmission not effected by external magnetic fields or ferrous particles in water.
SPECIALITY:
* Internal filter of adequate filtering section.
* Large measuring range and high flow accuracy
* Low start-up flow, high sensitivity, long life of service time.
WORKING CONDITION:
* The max. admissible pressure: 1.6MPa(16bar)
* Water temp. : not more than 50℃
Maximum permissible error:
Between qt (included) and qs is ±2%;
Between qmin and qt (excluded) is ±5%.
NOTE: The technical data conform to ISO4064 standard, class B.
FLOW-ERROR CURVE
SPECIFICATION AND OVERAL DIMENSIONS
|
Description |
Unit |
Hydraulic data and dimensions |
|
Nominal size |
mm |
15 |
20 |
25 |
32 |
40 |
50 |
|
inch |
1/2 |
3/4 |
1 |
11/4 |
11/2 |
2 |
|
Overload flow-rate (qs) |
m3/h |
3 |
5 |
7 |
12 |
20 |
30 |
|
Permanent flow-rate (qp) |
m3/h |
1.5 |
2.5 |
3.5 |
6 |
10 |
15 |
|
Transitional flow-rate (qt) |
l/h |
120 |
200 |
280 |
480 |
800 |
3000 |
|
Minimum flow-rate (qmin) |
l/h |
30 |
50 |
70 |
120 |
200 |
450 |
|
Min. reading |
l |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
|
Max. reading |
m3 |
99999 |
99999 |
99999 |
99999 |
999999 |
999999 |
|
Nominal pressure |
MPa |
1.6 |
1.6 |
1.6 |
1.6 |
1.6 |
1.6 |
|
ΔP at the qs |
MPa |
0.06 |
0.08 |
0.05 |
0.09 |
0.085 |
0.085 |
|
L |
mm |
165 |
190 |
260 |
260 |
300 |
300 |
|
I |
mm |
243 |
286 |
376 |
376 |
438 |
438 |
|
H |
mm |
108 |
108 |
126 |
126 |
170 |
170 |
|
B |
mm |
98.5 |
98.5 |
98.5 |
98.5 |
130 |
130 |
|
G |
inch |
G3/4B |
G1B |
G11/4B |
G11/2B |
G2B |
G21/2B |
|
R |
inch |
R1/2 |
R3/4 |
R1 |
R11/4 |
R11/2 |
R2 |
|
Weight |
Without connections |
Kg |
1.20 |
1.43 |
2.34 |
2.42 |
3.77 |
4.72 |
|
With connections |
1.37 |
1.69 |
2.79 |
3.05 |
4.47 |
6.12 |
OVERALL DIMENSIONS PRESSURE LOSS CURVE
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