CNIRHURRICANE TECH CO. LTD. DN20 Manuale Utente
2
1. Implementation standards:
China national standard GB/T778.1-2007/ISO4064-1:2005
Water flowrate measurements of drinking cold water meters and hot water meters in
Closed full pipelines
Water flowrate measurements of drinking cold water meters and hot water meters in
Closed full pipelines
2. Main technical parameters
Item
Parameters
Model
PWM
15
PWM2
0
PWM2
5
Diameter
DN15
DN20
DN25
Overload
flowrateQ (m
3
/h)
3.125
5.0
5.0
Permanent flow rate Q
3
(m
3
/h)
2.5
4.0
4.0
Transition flow rate Q
2
(m
3
/h)
0.025
0.04
0.04
Minimum flow rate Q
1
(m
3
/h)
0.015
0.025
0.025
Q
3
/ Q
1
R160
Accuracy class
2
Medium temperature range
T50(0.1℃~50℃)
Sensitivity class of flow profile
U5,D3
Pressure loss at Q3
ΔP63
Hydraulic pressure class
MAP16
Ambient class
Class C
Protection class
IP68
Compatibility class of
electromagnetism
E1
Meansurment cycle
Once/250ms