Coil Type Heat Exchangers

Coil Type Heat Exchangers

Coil Type Heat Exchangers are compact and efficient heat transfer devices designed using precision-formed borosilicate glass coils enclosed within a glass shell or vessel. They are widely used for cooling, heating, condensation, and evaporation duties in corrosive and high-purity process environments.

These exchangers are especially suitable where space constraints, chemical resistance, and easy maintenance are critical.

What is a Coil Type Heat Exchanger?

A Coil Type Heat Exchanger consists of:

• A helical or spiral glass coil acting as the heat transfer surface
• One fluid flowing inside the coil
• Another fluid flowing outside the coil within the surrounding shell or vessel

Heat is transferred through the glass wall by conduction, while both media remain completely isolated, ensuring process safety and contamination-free operation.

Working Principle

• Hot or cold utility fluid flows through the glass coil
• Process fluid circulates around the coil inside the shell
• Heat transfer occurs through the borosilicate glass surface
• Smooth glass prevents fouling and scaling\\
• Desired outlet temperature is achieved with stable performance

Salient Features

• Excellent corrosion resistance against acids, alkalis & solvents
• Non-fouling smooth glass surface for consistent heat transfer
• Compact & space-saving design
• Lightweight construction
• Easy installation and replacement
• High thermal efficiency for moderate duties
• Suitable for vacuum and atmospheric pressure operations

Material of Construction

• Borosilicate Glass 3.3 (DIN / ISO compliant)
• PTFE / Viton sealing options
• Optional SS / MS / FRP support frames
• Glass nozzles for inlet & outlet connections

Design Variants

• Single-coil configuration
• Multi-coil configuration
• Vertical or horizontal mounting
• Detachable or fixed coil design

Applications

• Chemical & Fine Chemical Processing
• Pharmaceutical & API Manufacturing
• Distillation & Condensation Systems
• Solvent Recovery Units
• Acid & Alkali Cooling
• Pilot Plants & R&D Units

Typical Uses

• Condensers
• Heaters
• Coolers
• Evaporators
• Reflux Condensers

Advantages Over Metal Heat Exchangers

• No corrosion or metal contamination
• Cost-effective alternative to graphite, hastelloy & titanium
• Ideal for high-purity and aggressive chemical services
• Easy cleaning due to non-stick glass surface

Key Benefits

• Long service life
• Low maintenance requirements
• Stable thermal performance
• Suitable for compact plant layouts