Low consistency refiner

The OptiFiner concept for mechanical pulping, recycled fiber and stock preparation applications focuses on processing to obtain desired fiber properties through accurate refiner gap control.

The OptiFiner refiner ensures stable operation and uniform refining results. This refiner features a cantilevered design with fixed stator and uniformly moving rotor. The single stable gap clearance is maintained by precise control technology.


LC refiners - Spare Parts and components

Shaft assembly

An overhauled and modified shaft assembly is available for all sizes of Conflo/OptiFiner RF refiners.


LC refining - Maintenance and shutdown service

StockBoost for refining

Tailor-made upgrades for existing refiners.

Low-consistency refining performance review

Solution for cost-effective refining.



LC refining - Process and automation upgrades

Turbine housing

Turbine Housing that replaces the existing radial outlet design with a tangential outlet.

Closed mechanical seal

Valmet-developed seal allows the use of a mechanical seal for low-consistency refiners in difficult seal water conditions.

Adjustable Gap Sensor (AGS)

Disc gap calibration during full production.

TVD - Touch point vibration detector

Replaces the old SPM/TPM system.

Mechanical seal – SealMax BA-LC

Valmet mechanical seal type BA-LC for OptiFiner Low consistency refiner.



Refiner segments for LC-refining

Refiner Segments - Micro bar

Enables high cutting edge length and hydraulic capacity, which provides good loadability.

Refiner Segments - Attack bar

Tilted bars and sharp bar edges, facilitates a more effective fiber treatment.

Parallel bar refiner plates

Features one bar per sector at the given angle, with the other at progressively higher angles.