Mütek DFR-05 Drainage Freeness Retention

The lab device Mütek™ DFR-05 Drainage Freeness Retention simulates
the retention and drainage conditions prevailing in a paper machine
immediately before and during sheet forming. This enables a
systematical assessment of chemical influences. Chemical addition is
fully automatic via an integrated dosing module.
The optionally available RET-20 Lab Sensor directly measures the
filtrate consistency, making a time-consuming manual determination of
stock and ash consistencies superfluous.
The drainage behavior is characterized by gravimetry of the filtrate
volume. Besides, the Schopper-Riegler freeness can be determined
from which the Canadian Standard Freeness (CSF) may be calculated
applying a correlation.