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Defibrator system

The key features of the Evolution Defibrator system include a high-capacity screw-feeder system with a dewatering plug pipe and advanced helical discharge from the refiner housing.


This system includes a bearing system with no axial play, an exterior design that contributes to operating stability and facilitates access for easier maintenance.

Since launch, the EVO series has been expanded to include an EVO 46, EVO 50, EVO 56, EVO 64, EVO 70, EVO 74. Since its launch on Ligna 2005, the EVO series has been a great sales success and is operational on all of the world’s continents.

  • Low operating cost
  • Low electric energy consumption
  • Excellent dewatering capacity
  • Saves energy in the dryer
  • Low steam consumption
  • Minimal water consumption
  • Uniform fiber flow
  • Saves resin
  • Easy to operate and maintain
  • Short time to production
  • Global service network
  • Continuous development

Evolution Defibrator series

EVO models with segments ranging in diameter from 46 to 74”.


Process and automation upgrades for defibrator systems

Diverter Valve

The most price competitive diverter valve in the market.

Blow Valve ET

Wear resistant blow valve, increases service life and provides stable operation.

Preheater Upgrade

Upgrade kit that raises the preheater’s capacity by up to 30%.

High Performance Gear Box

Valmet offers an upgrade kit to replace existing agitator drives for preheaters.

Feeding Technology

Screw feeder technology that provides uniform feeding, optimized dewatering and reduced energy consumption.

Feed Screw LL

The geometry in combination with low friction in the long lasting material contributes to a lower energy consumption.

Tandem blow-back damper

Creates increased load on the blow-back damper for increased dewatering.

Dewatering Plug Pipe

A plug pipe that dewaters the raw material even more before it enters the preheater.

Mechanical Seal for Defibrator system

Highly specialized seals, custom made for optimum sealing performance.

Mechanical Seal for L42 - L46 Defibrators

Kit for conversion to a mechanical seal and an accessory sealing water system.

Steam Cone

Even steam distribution and reduced bridging.

Automation products for Defibrator system

Take control of your Defibrator

Disc Gap Control

Safely control the refiner/ Defibrator from a remote control room.

Refiner Adjustment Device

This is an upgrade device that is more reliable and demands less maintenance.

Refiner Control System Upgrade

Process Automation – Improvement products

TVD - Touch point vibration detector

Replaces the old SPM/TPM system.

Refiner Hydraulic Unit

A complete unit that fits on existing refiners without any modifications.

Water Purifier

Less costs for maintenance and repair of the seal


Spare parts and components for Fiberboard

Refiner Exchange Service

A completely reconditioned drop-in unit, upgraded to the latest design.

Mechanical Seal for Defibrator system

Highly specialized seals, custom made for optimum sealing performance.

Exchange Agreement

Alternative to purchasing spare parts in connection with a new investment.

Valmet Refiner Upgrade

For longer service lifetime for the M/P-series Defibrator


Maintenance and shutdown services for fiberboard

Valmet Refiner Reconditioning

Modular maintenance solutions for flexible service offering.

Recond. of drop-in units – RG(P), L

A profitable investment for maximum service life, availability and performance.

Plugscrew Reconditioning

Reconditioning packages ensures uniform chip feeding.

Segment holders

Maintenance program for refiner segment holders improves refiner operation.


Process support and optimization for Fiberboard

Process optimizer for fiberboard

Your process can do even better!

Process Optimizer Agreement

To helps customers to reduce mat density deviation and specific energy costs.





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