Burkert Type 8623 - Manual (Page 5)

8623 - 3
english
3 APPLICATION AREAS
3.1 Control and display of flows in pipe runs
Fig. 1: Layout of a
control system using the
Type 8623 compact flow
controller (circuit)
3.2 Ratio Control
Q
1
regulated flow
V ratio factor
Q
2
unregulated flow
Fig. 2: Layout of a ratio control using the Type 8623 compact flow controller
(circuit)
• Mixing of two liquids
• Control of a liquid flow above a second liquid flow
In ratio control, the flow in one pipe run is fed into the flow in a second pipe run
at a certain ratio. The ratio is adjustable between 0.01 and 9.99. The two flow
rates are measured using two flow sensors with frequency outputs.
Q
1
= V * Q
2
Proportional valve
Regulated flow
Standard
signal input
Flow controller
Flow controller
Flow sensor 1
Proportional valve
Regulated flow Q
1
Flow Q
2
(unregulated)
Flow sensor
Flow sensor 2