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Measures the drainage rate of a diluted pulp suspension

Widely used to monitor changes in the drainage rate of chemical pulps during beating and refining. The drainage rate being related to the surface conditions and swelling of the fibers.

The refining of pulps is one of the most important stages in the paper production process, because it consumes such a large amount of energy and strongly influences the sheet forming and its physical properties. This offers a measurable index of the efficiency of the refining process.

The CF-21 is designed for bench top use and includes leveling feet with a precision bull-eye level. The pneumatically driven lids for the drainage chamber ensure simple, accurate, safe and quick operation.


  • Complies with TAPPI T227,SCAN C21/65, ISO 5267/2
  • Stainless steel and chromed bronze-cast components provide ruggedness needed for usual intensive routine of QC Tests
  • Calibrated standard screen plate – FP Innovations (PAPRICAN) Optional accessories
  • Device CF-DR used to remove the fibers from the drainage chamber
  • Fitted with pneumatic vacuum generator
  • Consistency cups for quick preparation of 1l testing fraction of pulp suspension

Optional Accessories
Filter for water model GS200UV – 5l/min according to ISO 14487

Calibrated bottom orifice (74.7 ± 0.7) s for 1l of H2O
Drainage Chamber Volume 1000 ml
Drainage Area 2.81 cm2
Air Supply 6 bar, instrument quality
Air Consumption 0.1 m3 /h

(W x L x H): 350 x 500 x 900 mm
Weight: 36 kgs

For further information, please contact our sales team on 01223 492081 or via

Canadian Standard Freeness Tester (CF-21)
Canadian Standard Freeness Tester (CF-21)
Regmed – Rycobel

Regmed – Rycobel