Impingement Dryers & Ovens

Impingement dryer designs are common for many web and fabric drying applications. Unfortunately, many of these applications are handicapped by less effective nozzle designs. Glenro offers the process experience, engineering capabilities and testing facilities to maximize the drying performance of this type of hot air system solution for your application.

Nozzle Design Considerations

  • Nozzle Gap
  • Nozzle Opening
  • Nozzle Centerline Spacing
  • Nozzle Air Velocity
  • Nozzle Supply & Return Air Plenum Design


Dryer Design Considerations

  • Horizontal, Arched, Vertical or Conveyorized
  • Single or Dual Impingement
  • Integrated Energy Sources
  • Double Wall Insulated Steel Construction
  • Prepackaged, Skid Mounted Heating Apparatus
  • Clamshell Access, Screw Jack Access or Access Doors
  • Product Threading, Motorized or Manual
  • Constant or Variable Volume Control
  • Process Temperature Control
  • CE, CSA, CUL, FM, IRI, UL Approved Designs

Typical Nozzle Configurations

Tapered Nozzle Design
Glenro’s tapered impingement nozzle design provides excellent directional airflow. Gap, opening and centerline spacing are all application specific.



Return Tube Nozzle Design
Incorporates a tapered nozzle design with return air tubes between the center line spacing of the nozzles. This design is particularly effective for wide product applications.




Mailbox Nozzle Design
This diagram shows "mailbox" impingement nozzles, which generate a specialized airflow pattern.



Tapered Nozzle Design

Horizontal Single Side Impingement Dryer
This dryer is designed to dry a water based silicone release coating of kraft paper. It was delivered completely factory assembled. Good things do come in small packages…

  • Dryer Length: 10’ (3 m)
  • Heat Source: Natural Gas
  • Air Temperature: 500°F (260°C) maximum
  • Line Speed: 250 fpm (76 mpm)


Horizontal Arched Impingement Dryer
This arched dryer, constructed of stainless steel, is designed to dry solvent-based medical adhesives. The design features internal idler rolls supporting the product and access provided by motorized screw jacks.

  • Dryer Length: 40’ (12 m)
  • Heat Source: Heat Recovery from Thermal Oxidizer
  • Air Temperature: Product Dependent
  • Line Speed: Product Dependent


Horizontal Dual Impingement Dryer
Narrow two zone system designed to dry an extruded water based adhesive on multiple wire ends. The design features clamshell access and prepackaged, heating apparatus supported above the dryer enclosures.

  • Dryer Length: 8’ (2.4 m) per zone
  • Heat Source: Natural Gas
  • Air Temperature: 400°F (200°C)
  • Line Speed: 82 fpm (25 mpm)


Vertical Impingement Dryer
This vertical impingement dryer is electrically heated, prepackaged and assembled. It was designed to dry a water based printed adhesive on film.

  • Dryer Length: 7’ (2 m)
  • Heat Source: Electric
  • Air Temperature: 250°F (120°C)
  • Line Speed: 328 fpm (100 mpm)




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Return Tube Nozzle Design

Horizontal Impingement Dryer
Return tube dryer design dries water based silicone finishes on wide nonwovens. This nozzle design promotes very uniform air flow for wide product applications. Access was provided with motorized screw jacks. The supply fans and heating equipment were integral to the base of the enclosure.

  • Dryer Length: 7.75’ (2.4 m)
  • Heat Source: Natural Gas
  • Air Temperature: 375°F (190°C)
  • Line Speed: 125 fpm (38 mpm)


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Mailbox Nozzle Design

Vertical Dual Impingement Dryer
This tall, vertical dual impingement dryer is designed to dry water and remove residual solvent from a microporous, polymer web. The system features mailbox nozzles, integral steam coils and supply air fans to heat and circulate the heated air.

  • Dryer Length: 29’ (9 m)
  • Heat Source: Steam
  • Air Temperature: 250°F (120°C)
  • Line Speed: 210 fpm (64 mpm)


Horizontal Dual Impingement Dryer
Specially designed herringbone mailbox nozzles were included with these steam heated process dryers to remove surface and residual moisture from a stainless steel coil.

  • Dryer Length: 8.5’ (2.6 m)
  • Heat Source: Steam
  • Air Temperature: 250°F (120°C)
  • Line Speed: 185 fpm (56 mpm)


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