J&L Fiber Services’ cast ProSafe segments are a lighter and safer alternative to traditional plates. Easier to position while bolting to the mounting surface, they reduce the risk of personal injury. ProSafe segments are also designed to fit both our own customized, long-life plate holders and competitive plate holders—with overhung and underhung capability.

Easy to lift and position for mounting, our lightweight ProSafe segment plates help prevent knuckle, hand and back injuries. There is also Overhung Plate opportunity to maximize hydraulics and bar edge crossings.

refiner plates
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ProSafe Pattern Offerings

ProMax ReverseFlare


  • Alternating Deep Grooves
  • Radial Feed Grooves for Improved Feeding into Refining Zone
  • No Transition Zones (see case study on the right)
  • Lower Angle Pattern Designs
  • Long Plate Life

ProMax Constant Angle Multi-Zone


  • Alternating Deep Groove
  • Uniform Bar Crossing Angles over Entire Surface of Plate
  • Homogeneous Fiber Treatment and Quality
  • Longer Plate Life
  • Individual Refining Zone Customization [Bar and Groove Width & Bar Angle]

Ultra Bar


  • Low-Intensity Pattern means Increased Pulp Strength
  • Taller Bar Heights mean Longer Plate Life
  • Deeper Grooves equal Higher Refining Capacity
  • 5o Bar Draft Angle



  • Grooves widen from ID to OD
  • Less Prone to Plugging
  • Longer Plate Life
  • Low Operating Costs

Other pattern offerings: 1) Traditional Constant Angle; 2) Traditional Parallel Bar; 3) Parallel Bar Flared; 4) Two-Zone; 5) DynaFlo; and 6) Milled Bar.

ProSafe benefits

  • Lighter and Safer
    At 12 to 14 pounds, our ProSafe segments weigh 75% less than traditional full-size segments
  • Pattern Diversity and Selection
    No one can match the broad choices of patterns we make available through our ProSafe segments
  • Multiple premium Alloys
    Any of our proven alloys can be used in the casting of ProSafe segments
  • Best-in-Class Lead Time
    We can deliver ProSafe segments and holders within four to six weeks of receiving an order

Overhung Capability

Our ProSafe casting process makes us uniquely able to provide overhung designs. That means you benefit from increased capacity at a lower intensity for longer plate life and improved fiber development.

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Refiner Plate Design

Different refiner applications require different plate designs as system optimization is undertaken.

Fiber treatment, hydraulic capacity and breakage resistance are three critical parameters that must be considered when designing and applying low consistency refiner plate patterns.

A paper mill can optimize its low consistency refining operations on two fronts:

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

By working together with our papermakers, J&L Fiber Services seeks to develop strategies to optimize the unique needs and performance of a particular paper mill.

Given the difficulties of being able to control all of the many process variables, refiner plate design becomes extremely critical. The key design parameters, relative to delta P (refiner pressure control) are: groove depth, groove profile, number of bars & total pumping angle.

The intensity of refining that is required will determine the bar width/groove relationship,or pitch. However, groove width should be altered to optimize the throughput rate. This can be done without changing the pitch or intensity by altering the bar width correspondingly.

A special caution when altering groove depth for flow control: While no appreciable negative effect will occur when groove depth is reduced for lower flow rates, increasing groove depth poses some risks. First, it is less efficient than increasing groove width. Second, it can have a negative effect on energy efficiency, because increasing groove depth increases the no-load energy required to spin the rotating element in the stock slurry.

Bar angle is significant to the extent that it affects the delta P and is a tool for hydraulically balancing the refiner.

The relatively infrequently used practice of running the low consistency refiner plates in the holdback position can effectively compensate for low flow conditions which are detrimental to fiber quality, plate life, etc. During holdback, the intersecting bar angle between the rotor and the stator is moving towards the center line of the refiner rather than towards the periphery of the disc, as in pumping position. Holdback will increase the turbulence in the grooves and the plate gap.