Immersion Heat Exchangers

Immersion Heat Exchangers

Immersion Heat Exchangers are direct-contact heating or cooling devices designed to be immersed directly into process liquids for efficient and controlled heat transfer. Manufactured from borosilicate glass 3.3, these exchangers are ideal for corrosive, high-purity, and temperature-sensitive fluids, where metal contamination must be avoided.

They are widely used in reactors, vessels, tanks, and glass process equipment across laboratory, pilot, and industrial systems.

Working Principle

• Heating or cooling medium (hot water, steam, thermal oil, or chilled fluid) flows inside the glass coil or tube.
• The exchanger is fully immersed in the process liquid.
• Heat transfers through the glass wall by conduction.
• The surrounding liquid is uniformly heated or cooled without direct mixing.

Construction & Design

• Helical or serpentine glass coil / tubular design
• Fabricated from borosilicate glass 3.3
• Smooth internal & external surfaces
• Ground glass joints or flanged connections
• Designed to withstand thermal shock

Key Features

• High heat transfer efficiency
• Excellent corrosion resistance
• No metal contamination
• Uniform temperature distribution
• Easy removal, cleaning & replacement
• Compact and lightweight design

Technical Specifications (Typical)

Parameter	Specification
Material of Construction	Borosilicate Glass 3.3
Design Type	Coil / Tubular Immersion
Heating / Cooling Media	Steam / Hot water / Thermal oil / Chilled water
Operating Temperature	Up to 200–250 °C (media dependent)
Operating Pressure	Atmospheric to low pressure
Installation	Direct immersion
Joint Type	Ground joint / Flanged
Custom Sizes	Available

Applications

• Glass reactors & process vessels
• Chemical and pharmaceutical heating
• Solvent temperature control
• Pilot plant systems
• Acidic & corrosive liquid heating
• Laboratory process equipment

Advantages

• High thermal efficiency with minimal surface fouling
• Safe operation for aggressive chemicals
• Full visibility of process conditions
• Easy integration into existing vessels
• Low maintenance and long service life

Optional Accessories

• Temperature probe pockets
• External supports & clamps
• Insulation sleeves
• Custom inlet / outlet orientation
• Integration with control systems

Customization

• Immersion Heat Exchangers can be custom designed based on:
• Vessel size & geometry
• Required heat duty
• Process fluid characteristics
• Operating temperature & pressure
• Mounting and connection requirements