New Heat Exchangers

Plate & Frame

The gasketed plate heat exchanger is a compact and efficient heat transfer solution for a wide variety of applications in practically all industries. The PHE works with low pressure drop but maintaining high turbulence across the plate surface for maximum heat transfer. Sondex plates feature superior gasket security by means of a closed gasket groove. The plate gasket can be either glue on or clip on and are available in Nitrile and EPDM. Sondex plates are designed with channels preventing "dead spots" on the plate heat exchanger, and the system is set up to enable easy dismantling for cleaning or addition of plates.

Our heat exchangers are designed individually to each application, with the number and size of the plates determined by the fluid flow rates, thermodynamic and fluid dynamic properties of the fluids, allowable pressure drop and temperature difference. This engineered design ensures you get the most suitable and cost effective heat transfer solution backed by HEWA’s unparalleled customer service and technical support.

Plates are available in AISI 316, Titanium, SMO 254 and Hastelloy, and typical uses for PHE systems include:

• Heating and cooling in the mining and minerals industry.
• Heating and cooling in mechanical services and HVAC installations.
• Pasteurisation and heating and cooling of foodstuffs in the food and beverage industry.
• Heating and cooling in marine and power applications.

All Welded Plate & Shell

This heat exchanger essentially works in the same way as an ordinary shell and tube unit, but is more efficient because plates have been used instead of tubes. The plates are laser/TIG welded together to form a plate pack, which is then mounted inside a traditional cylindrical shell.

This system can offer substantial savings over conventional shell and tube exchangers due to the efficiency of the plate pack compared to a system of tubes. Operational advantages of the plate and frame heat exchanger include:

• No gaskets
• High working temperatures up to 250°C
• High working pressure up to 25 bar
• Small liquid hold up volume
• Small space requirement (takes up only 30% of the space of a traditional shell and tube unit)
• The plate pack is much more easily serviced and repaired than the components of a shell and tube exchanger.

Brazed Plate

For extreme heat transmission jobs, a brazed plate heat exchanger can provide a strong and efficient solution. The high heat transmission comes from the plate pattern which is designed to create a turbulent flow whilst maintain low pressure drops. The entire system is comprised only of heat transfer surface – without rubber gaskets – so can operate continuously at temperatures from minus 180°C up to 200°C, with a pressure rating of up to 2,500kPa (362 psi). The plate pack, assembled with two end plates and connections, is vacuum brazed at extremely high temperatures providing a permanently sealed heat exchanger.

These heat exchangers are highly economical to run, very compact (up to 60% smaller than traditional heat exchangers) and require only thin plate material, making brazed plate systems extremely competitive in pricing. These units offer significant advantages over old-style shell and tube or coaxial devices being. Typical uses include:

• Heating and cooling duties in the manufacturing industry for clean fluids such as hydraulic oil, refrigerants and scheme water.
• Heating and cooling in HVAC installations.
• Evaporation and condensation in DX chilling applications with refrigeration systems using R-22, R-134a, R-404a, R410a and other refrigerants

Free Flow

The free flow plate heat exchanger is specially designed for fruit juice, sugar and general industrial markets handling fluids which contain fibre or solids. The plates sit together without any metal contact between them, ensuring flow is unimpeded and that particles will not be caught in the plates. Gasket are clip on and are available in Nitrile and EPDM. Plates are available in AISI 316, Titanium, SMO 254 and Hastelloy.

Typical uses of free flow heat exchange systems include:

• Cooling/heating of fibrous material, like fruit juice, containing pulps.
• Pasteurizing cream, yoghurt and viscous ice cream mixes.
• Cooling wort with mash.
• Cooling mustard and tomato sauces.
• Cooling and heating biodiesels during fermentation, liquefaction, distillation, rectification and evaporation
• Heat recovery from industrial applications, containing impurities, such as waste water or cellulose.