Flotation Dryers & Ovens

Flotation dryers are ideal for applications where the web is coated on both sides, or for delicate webs that cannot be mechanically supported. Flotation dryers direct heated air at the product from both sides, producing more effective heat transfer rates per running length of dryer. The specially designed nozzles support the product on a bed of air, thus the term “flotation”. As with any application you bring to our attention, Glenro will apply its process experience as we evaluate your performance criteria and the physical characteristics of the materials to be heated to form the basis of any system recommendation.

Nozzle Design Considerations

  • Low Tension vs. Airfoil
  • Nozzle Gap
  • Nozzle Opening
  • Nozzle Centerline Spacing
  • Nozzle Air Velocity

Dryer Design Considerations

  • Horizontal
  • Integrated Designs
  • 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

Low Tension Nozzle Design
This nozzle design provides a cost effective and competitive alternative for less sensitive materials that require flotation.





Airfoil Nozzle Design
Glenro’s airfoil nozzle design provides exceptional performance and higher heat transfer rates based on flexible nozzle centerline spacing.






Low Tension Nozzle Design

Narrow Web Low Tension Flotation Dryer
This dryer is designed and manufactured by Glenro to dry a narrow, saturated filter media. It came prepackaged and assembled.

  • Dryer Length: 9’ (2.7 m)
  • Heat Source: Electric
  • Line Speed: 10 fpm (3 mpm)
  • Web Width: 15” (6 cm)



Wide Web Low Tension Flotation Dryer
Two zone dryer dries saturated finishes on glass fabric. The design was integrated for use with a thermal oxidizer and a heat recovery system. Access was provided by motorized screw jacks.

  • Dryer Length: 40’ (12 m)
  • Heat Source: Heat Recovery
  • Line Speed: 30 ypm (27 mpm)
  • Web Width: 84” (33 cm)
  • Web Weight: 12.75 oz/yd2 (432 g/m2)


Wide Web Low Tension Flotation Dryer
This three zone dryer is designed to dry water and remove residual solvent from a microporous, polymer web. The system features preassembled, skid mounted steam coils and supply air fans to heat and circulate the heated air, as well as a motorized product threader.

  • Dryer Length: 58’ (18 m)
  • Heat Source: Steam
  • Air Temperature: 300°F (150°C)
  • Line Speed: 200 fpm (60 mpm)
  • Web Width: 76” (30 cm)
  • Web Weight: 22 g/ft2 (237 g/m2)


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Airfoil Nozzle Design

Airfoil Flotation Dryer
This compact dryer is designed to dry residual surface moisture from a polymer film.

  • Dryer Length: 6’ (1.8 m)
  • Heat Source: Natural Gas
  • Air Temperature: 250°F (120°C)
  • Line Speed: 400 fpm (122 mpm)
  • Web Width: 30” (12 cm)
  • Web Weight: 0.01 lb/ft2 (49 g/m2)


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