Heavy duty Disc chipper

Valmet has supplied more than 2000 heavy duty chippers to date, which is half of the entire number of disc chippers for the fiber processing industry worldwide. This has given us a valuable insight into chipper durability in tough conditions. Our wide experience has been utilized in the development of the chippers we have today. Valmet can offer, and have long experience of, both gravity feed and horizontal feed type of chippers.

Valmet chippers maximize the amount of high-quality chips

The chipper is the heart of the wood handling process and plays a major role in maximizing the amount of high-quality chips for digesting. Correct chipping geometry and knife design are essential in minimizing wood losses and maximizing the amount of accepts. Another important factor affecting chip quality is the optimized control of logs and stable chipping in the direction of the fiber. The main factors in high capacity chipping are an even log feed rate, a wide infeed spout and a large number of knives.

The Valmet Disc Chipper has one of the widest infeed spout on the market, especially designed for multiple log chipping. The spout dimensions give both the extra width and height essential for high capacities with small or large logs and for the reduction of log jams. The ingenious spout design also ensures perfect log guidance for optimum chipping even with a single log.


Valmet Disc Chipper GS, GSN and HGS

The Valmet Disc Chipper GS, GSN and HGS inherited most of its chipping geometry from the Rauma GS chipper. The GS and GSN types are for gravity feed chipping and the HGS for horizontal feed chipping.


The present outstanding design is the result of over 200 years’ combined chipping experience gained from Rauma, Carthage and Murray chippers. The Disch chipper type GS, GSN and HGS offers the benefits of sixteen patented features.

Valmet chipping line and chip handling system.

Valmet Drum Chipper

The Valmet Drum Chipper is especially designed to handle a large variety of wood qualities, combining high capacity with excellent chipping performance. Horizontal feeding ensures safe and trouble-free operation. 



More than 2000 heavy duty chippers supplied worldwide.
Chipping - Spare parts and components

Chipper parts

Chipper parts are critical for the performance of the chipper and the wood handling process in general.

Durable Knife System

Sharp and strong knives ensure continuity of high chip quality.

Durable Counter Knife

Maximize the uptime of the chipper. Particularly suitable for hardwood chipping.

Durable Bed Knife

New generation bed knife designed to beat challenges of high wear hard wood production.

Split Clamp

Patented chipper part for all disc chippers.

Reversible Knife

Superior knife system improves chip quality


Chipping - Maintenance and shutdown services

Bedknife Reconditioning

A bedknife can be reconditioned about ten times depending on the degree of wear.

Bedknife Upgrade

Improved chip quality and easier adjustment of knife to bedknife gap.

Feed Spout Reconditioning

Guarantees stable and continuous infeeding.

Chipper function and condition test

The condition of the chipper is key to the production of high quality chips.

Service agreement for disc chippers

Guarantees reliable chip production and consistent chip quality.

Chipper Audit

Improve availability and end-product quality via pre-maintenance audit.

Chipper knife cleaning machine

Fast and safe cleaning of the chipper knifes.

Valmet chipper disc safety locking device

Safer maintenance of your chipper


Chipping - Process and automation upgrades

Split Spout

Maintenance can be done without removing the feed chute.

Chip Quality Agreement

Improve your process from the beginning.

Durable Chipper Hood

The technology is based on an extremely hard-faced hood wrapper in all areas subject to wear.

Easy Turn

Valmet emphasizes occupational safety with Chipper knife changing device.

Quick Fastening

Innovative knife fastening system with a single bolt.

Chipper Thrust Bearing

Thrust bearing system for disc chippers.

Easy Drive

Chipping speed control system.




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