Burkert Type 0258 - Manual (Page 9)

0258 - 7
english
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 curves for the Kv set-values of 3 m 3 and 6 m 3 are
shown in the following diagrams. The Kv set-value of 1 m 3 is being prepared.
Potentiometer 3) [%]
1 ) Flow: Kv value water [m³/h], measurement at +20 °C, 1 bar 3 ) pressure at valve inlet port and free outlet
port.
2 ) only Mod drive type
3 ) in relation to the total stroke of the potentiometer = 100 %
4 ) Pressure quoted in [bar]: over-pressure with regard to atmospheric pressure
Kv value [m
3
/h]
Flow characteristic curves 2) Kv-Sollwert = 3 m 3