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Washer Showers

One of the most important aspects of pulp washing is the application of the shower liquor onto the pulp mat. Inefficient, non-uniform application, or high velocity of the shower liquor results in lower washing efficiency and pulp mat disruption. Low washing efficiency can result in lower black liquor solids, higher carryover to the bleach plant or paper machines, and higher bleach and wet-end chemical use. Pulp mat disruption can lead to roll back and uneven mat formation causing shower liquor displacement to vary.

Uniflow™

In 2008, GL&V added the Uniflow™ shower to our family of washing showers. The Uniflow shower is a modified weir type shower, designed to produce a pond-wash effect for full cover-age of the pulp mat. The patented design enables twice the volume of shower liquor to be applied at the top of the wash arc than a standard nozzle-type shower. It achieves the high volume without the resultant high velocity that can disrupt the pulp mat.

Ultraflow®

With over 600 Ultraflow® showers sold worldwide since 2007, GL&V has the experience and technology to provide you with a custom solution specific for your operation’s needs.



Uniflow™

The Uniflow™ shower body can be manufactured in any of the 300 series stainless steels as well as some of the Duplex stainless steel family that includes 2101, 2304, 2205, and 2507 stainless steels. The extended lip that guides the wash liquor to the pulp map is manufactured out of Fiber Glass Reinforced Plastic (FRP) to provide flexibility as well as corrosion resistance. 

GL&V can offer the Uniflow shower in a variety of lengths and end connections to suit your specific piping arrangement and Vacuum Washer size.

Ultraflow®

The two UltraFlow® showers differ in visual characteristics but accomplish the same goal. The UF-5 Shower is built to the shape of a 5”x5” box. It utilizes a staggered lip and orifice design down the length of the shower to allow for overlapping of liquor spray. The shower 5”x5” ‘base’ is available in the 300 series and Duplex stainless steels as well as Fiberglass Reinforced Plastic (FRP) to allow our showers to be suited for any application. The UF-5 is designed to have bolt on replaceable lips and orifices to allow for easy replacement of damaged lips or the change out of orifices to permit a different flow. GL&V offers our lips and orifices in the 300 series stainless steels, as well as Kynar®* material. 

The UFM shower offers the same advantages of the UF-5 except it is manufactured with welded on lips and orifices. The UFM shower is built using a round pipe design with staggered lip and orifices down the length of the pipe to allow for overlapping of liquor spray. Due to the lips and orifices being welded on they are non-replaceable and are shipped complete. The UFM showers can be manufactured in the 300 series and Duplex stainless steels. UFM shower can offer the same quality and performance as the UF-5, but at a slightly lower cost. 

GL&V can offer both the UF-5 and UFM showers in a variety of lengths and end connections to suit your specific piping arrangement and Vacuum Washer size.

*Kynar® is a registered trademark of Arkema, Inc.
*GL&V has no affiliation with Arkema, Inc. or its associated companies.

Uniflow™

  • Elimination of runback
    • No run back behind the showers, most of the applied wash liquid is drawn into the mat resulting in less air/foam and better displacement
  • Reduction of required wash liquor
    • Total shower flow may be reduced due to the increased displacement efficiency. This can result in reduction in dilution factor
  • Even distribution
    • A pond of wash liquid is maintained to provide even distribution of the available wash liquid across the width of the washer
  • Increased Washing
    • If dilution factor is not an issue, shower flow may be increased significantly, within limits, without foaming and disruption to the mat
  • Increased Vacuum
    • Pound-wash effect reduces cylinder surface area for air to penetrate to help increase vacuum

Ultraflow®

  • Better recovery of cooking chemicals
    • The UltraFlow® showers help remove the maximum amount of the dissolved organic and soluble inorganic material with the last amount of fresh and recycled wash water.
  • Reduce the use of bleaching chemicals
    • The solids carryover can cause an increase in bleaching chemicals to achieve the same degree of delignification and brightness.
  • Reduce Effluent Treatment
    • Solids carry-over are a source of biological oxygen demand, chemical oxygen demand, and color when they reach effluent treatment.
  • No Mat Disruption
    • Correct flow and shower application angle removes pulp run back and mat disruption. Damage to the pulp map can lead to uneven displacement and air entrainment, while improper shower application angle can lead to low discharge consistencies, short extraction zone, air entrainment, and vacuum loss.
general requests

Washer Showers

One of the most important aspects of pulp washing is the application of the shower liquor onto the pulp mat. Inefficient, non-uniform application, or high velocity of the shower liquor results in lower washing efficiency and pulp mat disruption. Low washing efficiency can result in lower black liquor solids, higher carryover to the bleach plant or paper machines, and higher bleach and wet-end chemical use. Pulp mat disruption can lead to roll back and uneven mat formation causing shower liquor displacement to vary.

  • Further Details

    Uniflow™

    In 2008, GL&V added the Uniflow™ shower to our family of washing showers. The Uniflow shower is a modified weir type shower, designed to produce a pond-wash effect for full cover-age of the pulp mat. The patented design enables twice the volume of shower liquor to be applied at the top of the wash arc than a standard nozzle-type shower. It achieves the high volume without the resultant high velocity that can disrupt the pulp mat.

    Ultraflow®

    With over 600 Ultraflow® showers sold worldwide since 2007, GL&V has the experience and technology to provide you with a custom solution specific for your operation’s needs.



  • Technical Information

    Uniflow™

    The Uniflow™ shower body can be manufactured in any of the 300 series stainless steels as well as some of the Duplex stainless steel family that includes 2101, 2304, 2205, and 2507 stainless steels. The extended lip that guides the wash liquor to the pulp map is manufactured out of Fiber Glass Reinforced Plastic (FRP) to provide flexibility as well as corrosion resistance. 

    GL&V can offer the Uniflow shower in a variety of lengths and end connections to suit your specific piping arrangement and Vacuum Washer size.

    Ultraflow®

    The two UltraFlow® showers differ in visual characteristics but accomplish the same goal. The UF-5 Shower is built to the shape of a 5”x5” box. It utilizes a staggered lip and orifice design down the length of the shower to allow for overlapping of liquor spray. The shower 5”x5” ‘base’ is available in the 300 series and Duplex stainless steels as well as Fiberglass Reinforced Plastic (FRP) to allow our showers to be suited for any application. The UF-5 is designed to have bolt on replaceable lips and orifices to allow for easy replacement of damaged lips or the change out of orifices to permit a different flow. GL&V offers our lips and orifices in the 300 series stainless steels, as well as Kynar®* material. 

    The UFM shower offers the same advantages of the UF-5 except it is manufactured with welded on lips and orifices. The UFM shower is built using a round pipe design with staggered lip and orifices down the length of the pipe to allow for overlapping of liquor spray. Due to the lips and orifices being welded on they are non-replaceable and are shipped complete. The UFM showers can be manufactured in the 300 series and Duplex stainless steels. UFM shower can offer the same quality and performance as the UF-5, but at a slightly lower cost. 

    GL&V can offer both the UF-5 and UFM showers in a variety of lengths and end connections to suit your specific piping arrangement and Vacuum Washer size.

    *Kynar® is a registered trademark of Arkema, Inc.
    *GL&V has no affiliation with Arkema, Inc. or its associated companies.

  • Benefits

    Uniflow™

    • Elimination of runback
      • No run back behind the showers, most of the applied wash liquid is drawn into the mat resulting in less air/foam and better displacement
    • Reduction of required wash liquor
      • Total shower flow may be reduced due to the increased displacement efficiency. This can result in reduction in dilution factor
    • Even distribution
      • A pond of wash liquid is maintained to provide even distribution of the available wash liquid across the width of the washer
    • Increased Washing
      • If dilution factor is not an issue, shower flow may be increased significantly, within limits, without foaming and disruption to the mat
    • Increased Vacuum
      • Pound-wash effect reduces cylinder surface area for air to penetrate to help increase vacuum

    Ultraflow®

    • Better recovery of cooking chemicals
      • The UltraFlow® showers help remove the maximum amount of the dissolved organic and soluble inorganic material with the last amount of fresh and recycled wash water.
    • Reduce the use of bleaching chemicals
      • The solids carryover can cause an increase in bleaching chemicals to achieve the same degree of delignification and brightness.
    • Reduce Effluent Treatment
      • Solids carry-over are a source of biological oxygen demand, chemical oxygen demand, and color when they reach effluent treatment.
    • No Mat Disruption
      • Correct flow and shower application angle removes pulp run back and mat disruption. Damage to the pulp map can lead to uneven displacement and air entrainment, while improper shower application angle can lead to low discharge consistencies, short extraction zone, air entrainment, and vacuum loss.

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