Brochure

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VD.52.B4.02 © Danfoss 09/2015
DEN-SMT/SI
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Data sheet Thermostatic actuator RAVK
Sizing
Example:
Temperature control of service hot water
Given data:
Tank output: 14 kW (12.000 kcal/h)
Cooling (ow – return): 20 °C
Flow:
hm6,0
20
12
3

Dierential pressure
p across valve: 0,12 bar
Required:
Correct valve size
Solution:
From water volume (0,6 m
3
/h) and dierential
pressure (0,12 bar), read o the necessary
k
v
value in diagram = 1,75.
In this example, a P-band of 6 °C is required.
From the kv columns in the table, under 6 °C,
nd the appropriate valve body. Here, the most
suitable valve body is RAV 25/8 or VMT 25/8 with
a k
v
value of 1,8.