CALEFFI 520516AC Handbuch - Seite 4

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Operating principle
The thermostatic mixing valve mixes the hot
and cold water at the inlets to maintain constant
mixed water at the desired set temperature. A
thermostatic sensor (1) is fully immersed in
the mixed water outlet passage (2) which,
as it expands or contracts, continuously
establishes the correct proportion of hot and
cold water entering the valve. The regulation
of these flows is by means of a piston (3)
sliding in a cylinder between the hot and cold
water passages. This controls the passage of
hot (4) or cold (5) water at the inlet. If the inlet
temperature or pressure changes, the internal
element automatically reacts to restore the set
temperature at the outlet. The AngleMix 520
series point of distribution mixing valve is an
angled configuration for easy installation to
most water heaters for direct mounting to the
top pipe connections.
Flow curve
∆p (ft of head)
161
115
46
23
11.5
9.2
6.9
4.6
2.3
1.15
0.92
0.69
0.46
0.23
0.115
0.092
0.069
0.046
0.023
Cv = 2.0
Kv = 1.7
4
MIXED
2
1
4
3
HOT
5
(psi)
(bar)
5.0
70
50
2.0
20
1.0
10
0.5
0.4
5
0.3
4
3
0.2
2
0.1
1
0.05
0.04
0.5
0.03
0.4
0.3
0.02
0.2
0.01
0.1
0.005
0.004
0.05
0.003
0.04
0.03
0.002
0.02
0.001
0.01