15
V3.2 03.2015•
Subject to modification
UL marked actuators is optional, please contact your local Sales Representative for details.
Valve selection
The valve is determined using the maximum flow required max.
No calculation of the kvs value is required.
max = 30 … 100% of nom
If no hydraulic data are available, then the same valve DN can be selected as the heat
exchanger nominal diameter.
Minimum differential pressure
(pressure drop)
The minimum required differential pressure (pressure drop through the valve) for achieving
the desired volumetric flow max can be calculated with the aid of the theoretical kvs
value (see type overview) and the below-mentioned formula. The calculated value is
dependent on the required maximum volumetric flow max. Higher differential pressures
are compensated for automatically by the valve.
Formula
∆p
min
= 100 x
max
k
vs theor.
2
∆p
min
: kPa
max
: m
3
/h
k
vs theor.
: m
3
/h
Example (DN25 with the desired maximum flow rate = 50% nom)
Example (DN100 with the desired maximum flow rate = 50% nom)
Installation of immersion sleeve and
temperature sensor
DN65-DN150
The valve is equipped with two temperature sensors:
• T2: One sensor is already mounted in the valve unit.
• T1: The second sensor must be mounted at the installation site ahead of the consumer
(valve in the return line; recommended) or after the consumer (valve in the supply line).
The immersion sleeve required is supplied with the valve unit. The temperature sensor is
already wired with the valve.
~
10 m
G
L
T
L
DN
L
1)
G
L
65 ... 400
≤30 mm
½“
≥15 mm
1)
DN 65 = 30 mm
T
Note
The cables between valve unit and temperature sensors may not be either shortened or
lengthened.
EV..R+BAC / P6..W..EV-BAC
Installation notes
General information
min
= 100 x
max
k
vs theor.
2
= 100 x=
13 kPa
36 m
3
/h
100 m
3
/h
2
kvs theor. = 100 m
/h
Vnom = 1200 l/min
50% * 1200 l/min = 600 l/min = 36 m /h
3
3
min
= 100 x
max
k
vs theor.
2
= 100 x=
6 kPa
2.07 m
3
/h
8.6 m
3
/h
2
kvs theor. = 8.6 m
/h
50% * 69 l/min = 34.5 l/min = 2.07 m /h
3
3
BAC
P6100W2000EV-BAC
10m
