The intelligent combination of frequency-controlled pump and controlled overflow valve allows the compensation of variations in yeast consistency and wort flow rate. The method we developed for the determination of the yeast cell count through differential turbidity measurement ensures accurate yeast pitching. Variations in the basic turbidity of the wort are compensated. A static mixer developed specially for this application provides proper mixing of the yeast/wort mixture. As an alternative to differential turbidity measurement, the yeast volume can also be determined by a viable cell count.
Design
- Function-tested units preassembled on a compact baseframe
- Use of VARIVENT® components for highest hygienic standard and best CIP-ability
- Individual units can be upgraded from the simplest to the most powerful version without
welding and cutting work
- Capacity adjustment by exchanging parts with detachable connections within the range of
nominal widths DN 50 - DN 125
Technical data
- Integration of a serial interface for linking the line to a master control system
- Separation of wort and yeast pipe by VARIVENT® mixproof or normal shut-off valve
- Differential turbidity measurement, based on the correlation between turbidity and yeast cell count
- Control of the added viable cell count by measuring the electrical properties of intact cell membranes
- Sizes (wort pipe): DN 50 to DN 162 (6“)
- Wort flow velocity: 1.0 - 2.5 m/s
- Wort pressure: yeast pitching unit max. 6.0 bar
- Pressure drop in the wort pipe: yeast pitching unit < 0.5 bar
- Yeast pitching range: 5 - 50 million yeast cells / ml wort
- Nominal width of yeast pipe: DN 40 to DN 80
- Supply pressure of the pitching yeast: > 0.5 bar above the CO2 saturation pressure
> 0.5 bar under the wort pressure at the dosing point
- Product flow rate: up to 1900 hl / h