Coil Type Boilers

Coil Type Boilers

Coil Type Boilers are high-efficiency glass heating units designed for controlled boiling, heating, and vapor generation of process liquids. These units utilize a helical borosilicate glass coil through which a heating medium circulates, enabling uniform heat transfer with excellent thermal stability and full visual process monitoring.

Manufactured from borosilicate glass 3.3, coil type boilers are ideal for corrosive, high-purity, and temperature-sensitive applications in chemical and pharmaceutical processing systems.

Working Principle

1. Heating medium (hot water, thermal oil, or steam) enters the glass coil.
2. Process liquid is contained in the boiler vessel or flows externally around the coil.
3. Heat transfers through the glass coil walls.
4. Liquid reaches boiling point under controlled conditions.
5. Generated vapors are directed to condensers or downstream equipment.

Construction & Design

• Helical / spiral borosilicate glass coil
• Cylindrical or spherical glass vessel (optional)
• Ground glass joints / flanged connections
• Smooth internal surfaces to prevent fouling
• Designed for uniform thermal expansion

Key Features

• Uniform and controlled heat distribution
• Excellent thermal shock resistance
• Complete chemical inertness
• Visual monitoring of boiling process
• Low contamination risk
• Easy integration with distillation and reactor systems

Technical Specifications (Typical)

Parameter	Specification
Material of Construction	Borosilicate Glass 3.3
Coil Type	Helical / Spiral
Heating Media	Hot water / Thermal oil / Steam
Operating Temperature	Up to 200–250 °C (media dependent)
Pressure Rating	Atmospheric to low vacuum
Surface Finish	Smooth, non-porous glass
Joint Type	Standard ground joints / Flanged
Customization	Available

Applications

• Simple & fractional distillation units
• Solvent boiling systems
• Chemical reaction heating
• Pilot plant operations
• Pharmaceutical API processing
• Essential oil distillation

Advantages Over Metal Boilers

• No corrosion or metal contamination
• Transparent operation visibility
• Easy cleaning and validation
• Suitable for aggressive chemicals
• Long service life with minimal maintenance

Optional Accessories

• Temperature probe pockets
• External insulation jackets
• Support frames & clamps
• Pressure relief connections
• Condenser integration ports

Customization Options

Coil Type Boilers can be custom-engineered based on:

• Required heat transfer area
• Batch or continuous operation
• Vessel capacity
• Process temperature & solvent type
• Integration with existing glass systems