bürkert 8623-2 Betriebsanleitung Seite 52

3.2 Ratio control
• Mixing of two liquids
• Regulation of one liquid flow via a second liquid flow
In ratio control, the flow in one piping system will track the flow in another
piping system within a specific ratio. The ratio can be adjusted between 0.00
and 10.00. The two flows will be measured using two flow sensors with
frequency outputs.
Q = v * Q
1
Flow
sensor 2
Fig. 2: Layout of a ratio regulation using a compact flow regulator type 8623-2
(circuit)
Operating Instructions No. 803 052
2
Set-point input (2- 1,000 Hz)
Flow
sensor 1
Flow Q
Q regulated flow
1
v ratio factor
Q unregulated flow
2
Regulator Type 8623-2
Actual value
(2-1,000 Hz)
Regulated flow Q
1
Proportional valve
(unregulated)
2
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