Low consistency refiner segments for board and paper machines

Common among stock preparation and mechanical pulping applications, Valmet Low Consistency Refiner Segments give customers the flexibility to customize their approach to fiber processing to achieve specific goals in refining performance. Our refining experts work in close cooperation with customers to design and produce segments that are tailored to their individual needs.

Expertise in refiner segments

To achieve optimal results, different refiner applications require different designs as system optimization is undertaken. With the right expertise, a paper mill can optimize its low consistency refining operations by:

  • Monitoring and optimizing as many hydraulic, mechanical and process conditions as possible
  • Ensuring that the proper designs and alloys have been selected

Let us be your co-driver for success. In close co-operation with you we  understand your refining goals and the many related process variables that are critical to achieving success. Derived from the manufacturing legacies of Valmet and J&L Fiber Services, Valmet can offer low consistency fillings & segments for all existing LC refiners on the market. Valmet Refiner Segments offer a wide range of patterns/features for all refining needs.

Low consistency refining in mechanical pulp production is an energy efficient way to reduce shives or freeness in second or third stage refining. 


Selecting the right alloy

Alloys are an important process control tool in refining that can have an impact on the wear properties of a refiner segment. Proper alloy selection helps to:

  • Maintain a sharp bar edge
  • Create stronger segments
  • Increase durability and  segment life
  • Improve pulp quality

Valmet experts work with customers to optimize their refining processes using the right mix of alloys for each refining application.

Most important though is using clean pulp without any debris.

Low consistency refiner segment PERFORMANCE patterns
Alternating deep groove Maximize groove width for less plugging. Achieve maximum hydraulic capacity, KM/Rev and increased wear resistance for longer life.
Attack bar
Refine with a pattern design to maintain fiber length.
Constant angle Refine with a pattern that features bars positioned at a constant angle from the center circle of the segment.
Maximum flow Pumping inlet bars for increased hydraulic capacity.
Micro bar Achieve optimal refining performance in applications requiring significantly denser designs mainly for hardwood and mixed pulp applications.
Milled bar Refine with a pattern featuring precisely machined bars and grooves; particularly for low intensity refining of bleached hardwoods.
Parallel bar Refine with a pattern that features bars positioned parallel to one another across all segment fields.
Pro safe Lighter and safer than conventional segments. Weighing approximately 75% less than traditional alternatives, Pro safe segments are safer and easier to position while bolting to a mounting surface.
Reverse flare groove Prevent plugging with grooves that widen from ID to OD.
Turbulence dams Improve fiber treatment with better fiber-to-blade contact with a pattern that features subsurface Venturi dams in the grooves of the ID zone.
Ultra low intensity Maximize fiber strength development with a segment featuring virtually zero bar draft (0.5 degree) and a large open groove for longer life.
Variable groove Improve performance with a pattern that forces pulp into the disk gap.