Flow rate graph
G (l/min)
5
2
2,5
3
3,5
4
10
1
2
5
9
8
7
6
1,2
1,4
1,6
1,8
2,5
3
3,5
4
4,5
12
14
16
18
20
30
35
40
45
20
∆
p (kPa)
100
50
90
80
70
60
4,5
10
6
7
8
9
12
14
16
18
25
30
35
40
45
20
50
Ø 20 mm
Ø 15 mm
120
140
150
Pressure
dr
op
-
kP
a
Use and flow rate
Caleffi series 2522HP tempering valves are typically installed at the hot water heater. In order
to maintain the set temperature, the tempering valve must have a minimum flow rate of 4 l/min.
When used in instantaneous hot water systems, the most stable conditions are achieved with
the hot water temperature set lower than 65°C and with a flow rate greater than 6 l/min.
The system should be sized in accordance with the current legislation in regard to the nominal
flow rate of each outlet.
The reference is AS/NZS 3500.1 Table 3.1.
Flow rate - Litres per minute
Code
Ø (mm)
Kv (m
3
/h)
252212HP
15
1,5
252219HP
20
1,7
4
