Disc Refiner

A disc refiner uses relative motion between rotor and stator plates to shear, work and fibrillate pulp fibers. Plate segments, bars and grooves form the working surfaces. Shaft sleeves, bearings, seals, housing liners, feed screws and flow guide plates are key maintenance parts.

Equipment Section View

Disc refiner section view showing component positions

Equipment Parts

Part Identification and Technical Details

Explore part names, images, material options and technical requirements. Select a card to open the corresponding replacement part page.

Major Components and Assemblies

Individual and Maintenance Parts

Refiner Disc / Plates

Technical Requirements: Cast iron working surface approximately 50–62 HRC; use corrosion-resistant stainless steel for corrosive wet service

Refiner Plate Segments

Technical Requirements: Approximately 38–60 HRC; balance wear resistance, corrosion resistance and fracture resistance for the pulp grade

Rotor Refiner Segments

Technical Requirements: Requires dynamic balancing; mounting face flatness and segment weight variation to OEM specifications

Stator Refiner Segments

Technical Requirements: Control parallelism and refining clearance in conjunction with the rotor segments

Finebar Refiner Plates

Technical Requirements: Fine bars must be intact and free of shrinkage cavities and cracks; bar height, bar width and open area as specified in the drawing

Refining Bars

Technical Requirements: Typically 45–60 HRC; prioritize resistance to fatigue spalling

Refining Grooves

Technical Requirements: Groove width, groove depth and crossing angle affect specific edge load; measure these features against the original design

Shaft Sleeve

Technical Requirements: Stainless steel surfaces may be hardened to approximately 35–45 HRC; sealing surfaces require precision grinding

Bearings / Seals

Technical Requirements: Raceways approximately 58–64 HRC; select elastomers for temperature and chemical exposure

Housing Liner

Technical Requirements: Control corrosion resistance, weld quality and assembly clearance

Feed Screw

Technical Requirements: Substrate approximately 180–320 HBW; working edges require erosion resistance and resistance to bending

Flow Guide Plate

Technical Requirements: Flat surfaces and smooth edges to prevent fiber buildup and localized erosion

Materials for similarly named parts may differ by OEM, machine model and operating conditions. Confirm the machine model, OEM drawing number and measured dimensions before ordering or manufacture.

Equipment Manufacturers and Series

ANDRITZ Valmet Voith Paper

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Manufacturing Services in China

From Technical Assessment to Finished-Part Delivery

ANRANST provides customers worldwide with coordinated consulting, supplier sourcing, quality control and finished-part delivery for custom parts, wear parts and industrial spares from China, with scope to support other custom industrial parts.

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