Heat Exchangers

At IWC we have extensive experience in a wide range of heat transfer applications for liquid to liquid/evaporation and condensation/gas to liquid, and gas to gas. We identify which Heat Exchanger type is most suitable for the individual requirements applicable to our client specific process conditions and applicable experience.

IWC offers a comprehensive range of Plate Type Heat Exchangers for numerous applications. We also provide a range of spare plates and gaskets for most brands of exchangers.

IWC represents Solex Thermal Science in Southern Africa and have been providing heat exchangers for dry bulk solids since 2020. Dry bulk solids are products such as soybeans, sugar crystals, polymer pellets, coffee beans, foundry sand and many other products. Download the brochure to find out more about this solution.

 

How to select a
Heat Exchanger

How to select a
Heat Exchanger

 

Gasketed Plate
Heat Exchangers

Gasketed Plate
Heat Exchangers

Gasketed plate heat exchangers are used in many processes, in all kinds of industries. Auxiliary cooling at a power generation plant, or wort cooling at a brewery, or an ammonia evaporator to produce chilled water for mineshaft cooling are all applications done by plate type heat exchangers. Plate heat exchangers are available with single, semi-welded, free flow or fully welded plates.

Plates are bolted together in a plate pack with each plate sealed to the next by means of a gasket or a laser-weld. Plate and Gasket materials are carefully selected for the application in which the Heat Exchanger will operate.

Fully Welded
Heat Exchangers

Fully Welded
Heat Exchangers

Fully welded plate heat exchangers (WPHE) combine the best of two heat exchanger technologies - the high efficiency of a gasket plate heat exchanger and the robustness and gasket free solution for high pressures and temperatures of shell and tube HE’s.

IWC can offer different solutions from this range of heat exchangers, such as Plate and Shell and Square Block heat exchangers, Semi-Welded Plate heat exchangers, Pillow Plate heat exchangers and Fully Welded Plate heat exchanger. Each type with its own specific benefits.

Copper or Nickel Brazed
Heat Exchangers

Copper or Nickel Brazed
Heat Exchangers

Brazed plate heat exchangers consist of a number of thin (0.3mm), stainless steel plates, precision stamped and assembled as a unit. The plate pack, assembled with two end plates and connections, is vacuum brazed at extremely high temperatures providing a permanently sealed heat exchanger. The brazing ins mostly used with a copper alloy but in some instances, where copper is not allowed, nickel can be used as a brazing material.

This results in an efficient unit which gives a space and weight saving of up to 80% compared with a tube heat exchanger. These plate heat exchangers are suitable for applications requiring high temperatures and pressures. Brazed plate heat exchangers do not contain rubber gaskets and can therefore operate continuously at extreme temperatures from -180°C to 200°C with operating pressures as high as 30 bar. Applications where these heat exchangers are an effective solution include heating and ventilation (for solar heating and air-conditioning units), heat pumps, heat recovery, and hydraulic oil units.

Spiral
Heat Exchangers

Spiral
Heat Exchangers

Circular in design with two spiral channels; each one is a closed chamber allowing two media to remain separate while heat exchange occurs.

The flow of the two products is usually counter-current, which results in a close temperature approach between the two media. A variety of fluids / vapours can be circulated through this type of heat exchanger, including liquids containing solids and fibres, waste water and slurries to name a few.

The heat exchanger surface is easy to clean and maintain with its optional removable bolted covers that can be mounted with hinges to easily open allowing access to the internal spiral chambers.

Hybrid Air
Coolers

Hybrid Air
Coolers

Hybrid air coolers offer outstanding performance potential thanks to the combined effect of both wet and dry cooling.

The hybrid air cooler has the following design features:

  • Parts in contact with water are produced from stainless steel
  • Fans selections are optimized to reduce noise pollution and energy efficiency
  • Fans have continuous speed control to reduce energy consumption
  • Automatic functions include draining, biocide addition, conductivity measurement and blowdown

We offer the following options for the hybrid air coolers:

  • Cathodic dip-paint coating provides superior protection against corrosion
Airfin Coolers and
Condensors

Airfin Coolers and
Condensors

IWC offers a complete range of industrial air fin coolers and condensers to cover a wide range of performance parameters.

The range of air fin coolers we offer have the following specifications:

  • Finned Heat Exchanger Coils are provided with either copper of stainless steel (304 or 316) tubes configured with a staggered arrangement for efficient heat transfer.
  • Fins are fabricated with a number of options such as aluminium, ALMg, epoxy-coated aluminium, cathodic dip-paint coating or copper.
  • The air fin coolers have casings manufactured from powder coated galvanized steel with 316 stainless steel as an option.
  • Complete electrical control cabinet with control system to regulate summer/winter modes, adjustment of fan speed, control for the deluge system and automatic blow down and make up.