Burkert 0250, Operating Instructions Manual, Page: 9 / 64

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0250 - 9
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Control functions of the valves
Control function e
3-way valve for continuous mixing of the incoming flows
a and B to the port p,
motor-driven, holds position with no power
2-way valve for continuous control of the flow rate in outlet
port a,
motor-driven, holds position with no power
Control function I
Control function F
3-way valve for continuous distribution of the incoming flow
p to the outlet ports a and B,
motor-driven, holds position with no power
M
P
A
M
P
A B
M
B
P
A
Flow characteristic curves
the flow 1) characteristic curve for the 2-way valve and the distribution characterisitc
for the 3-way valve are shown in the following diagrams.
the inlet pressure is 1.5 bar
3).
potentiometer 2) [%]
1)
Flow: Kv value water [m³/h], measurement at +20 °c, 1 bar
3 )
pressure at valve inlet port and free outlet
port.
2 )
relative to the total stroke of the potentiometers = 100 %
3 ) pressure quoted in [bar]: over-pressure with regard to atmospheric pressure
Kv value [m
3
/h]
Flow characteristic curve (2-way-valve)
0 10 30 40 50 60 70 80 20
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
90 100