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.
Semi and Fully Welded Plate Type Heat Exchangers
The thermal efficiency in a welded heat exchanger is comparable to a traditional Gasketed plate heat exchanger. 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 specific benefits.
For all these types, plates are laser welded together to form a plate pack, which is then mounted inside either a traditional cylindrical shell for the Plate and Shell heat exchanger or bolted together in a frame for the other types. Compared to shell and tube heat exchangers, welded units take up significantly less space and when exotic materials are required for the application, these units are significantly cheaper than the Shell & Tube heat exchangers.
These units can operate with temperatures from -100°C to 400°C and with design pressures of up to 40 bar. These heat exchangers can be used to cool aggressive media and applications include mining processing, petrochemical, pulp and paper, steel and sugar industries.
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 Plate 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 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
- 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.
Air Fin Coolers and Condensers
IWC offers a complete range of industrial air fin coolers and condensers to cover a wide range of performance parameters.
he 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.