Air cooling system FH DC

for furnaces and ovensindustrialair-cooled

Product overview
Glass Service designs and supplies distributors and forehearths engineered for controlled thermal conditioning of glass before forming. Available in direct (FH DC) and combined indirect/direct (FH DC-IC) cooling configurations, these units prioritise thermal homogeneity, adjustable cooling and compact installation footprint.

Key features

• Available widths: 400–1500 mm
• Glass depth range: 178–250 mm (model- and glass-dependent)
• Cooling options: Direct central cooling (DC), Indirect radiant cooling (DC-IC) and combinations; optional bottom cooling for high-pull lines
• Independent left/right firing control and temperature measurement by optical pyrometers or platinum thermocouples

FH DC – Direct Cooling

• Central separated cooling channel minimizes interaction with side heating zones
• Uniform cooling air distribution along full zone length
• Simple refractory block design for faster installation and lower refractory costs
• Reduced overall length possible due to central cooling, saving installation space
• Mechanical design with high resistance to bending

FH DC-IC – Indirect + Direct Cooling

• Combination of sinusoidal radiation plates for smooth radiant cooling and direct central air cooling
• Separation of waste gases from cooling air—recommended for low-pull lines and special glass types
• Operator-adjustable balance between radiant and direct cooling for optimal homogeneity
• Bottom cooling can be added for high-pull installations

Direct vs Indirect cooling concept
Direct cooling: controlled cold-air flow along the forehearth centreline provides rapid central glass cooling and fast response during job changes. Indirect cooling: radiant plates transfer heat away smoothly from the centreline, providing gentle central cooling without direct air impingement.

Technical specifications

• Forehearth widths: 400–1500 mm (14"–54" depending on model)
• Glass depth: typically 178–250 mm (6"–9") depending on glass colour and type
• Model ranges: FH DC K16–K54; FH DC-IC K26–K54
• Temperature control: independent left/right firing
• Cooling air fan motor: example 3-phase 400 VAC 50 Hz – 0.55 kW (typical)
• Refractory design: simple block layout for easy installation and high bending resistance
• Indirect cooling surfaces: sinusoidal-profile radiation plates to enhance heat transfer