Caloperm - Model Duopyx -Plate Heat Exchanger

The profiled heat exchange plates of Duopyx provide for high evaporation performance and large heat exchange surfaces at small dimensions.

High turbulence reduces the risk of fouling even at low flow velocities.

The gasket-free plate connections allow differential pressures up to 250 bar. In contrast to plate heat exchangers with gaskets, there are no maintenance costs or downtimes caused by the regular replacement of gaskets. Duopyx is used for evaporation in a temperature range between -200 °C and +400 °C and heat duties from 100 kW to 5000 kW.

The thermodynamic and hydraulic characteristics of the Duopyx are determined by plate corrugations, plate size and plate number. Our standard plate material is 1.4404 (AISI 316L) with a thickness between 0.6 and 1.5 mm. We use nickel-based alloys or titanium for high temperatures, aggressive media, or sea-water.

The heat exchange plates of the Duopyx are joined together by a fully-automatic special welding process without any additional materials.
According to your demands Duopyx is available in different designs:

1. Standard design for extreme operating conditions or aggressive media:

• Completely welded shell

2. Enhanced standard design for conditions with higher demand for inspection and cleaning:

• Welded shell with screwed side wall

3. Special design: for conditions with higher demand for cleaning and high failure safety

• Screwed shell with removal plate pack.

The nominal connection size is - depending on the plate diameter - on the plate side between DN 25 and DN 300, on the shell side between DN 25 and DN 1000.

Duopyx will be optimally designed for your application and produced according to your connection specifications. It can be configured with level indicators, stand pipe, sight glasses and oil recovery.

Duopyx is designed and produced according to national, international, and maritime regulations.

Ask for two functions in one unit – we are glad to advice you.

The fully welded Caloperm heat exchanger combines the best features of plate heat exchangers and shell & tube heat exchangers.
The heat exchange area consists of a pack of profiled stainless steel plates alternately welded together at the outer and inner diameter. Fitted with end tubes the plate pack is brought in position inside the shell, all the support is assembled and finally all components are welded together to the complete gasket free Caloperm heat exchanger.

Like traditional plate heat exchangers the profiled heat transfer area stands for

• optimal thermal performance
• low fouling
• reduction in footprint
• close temperature approach

And as in the shell & tube technology the units are

• usable for high operating pressures
• feasible to very high and very low temperatures
• gasket free

 Each Caloperm plate heat exchanger is designed and manufactured for your specific operating conditions.
The heat exchanger plates are welded together with a robot welding system. Non destructive test procedures during the manufacturing ensure unchanged high quality of the plate packs. The production process is controlled by a quality system according to ISO 9001 and PED 2014/68/EU.

Working principle of the Caloperm heat exchanger
The plates are welded together alternately on the outer diameter and in the connection holes. Thereby a plate pack is formed with alternating channels for hot and cold media. The welded connection holes form the inner channel. At its end, this channel is fitted to the connecting pipe leading out of the shell. The shell channel goes straight through the plate pack. After assembling all components, the apparatus is totally welded together. This results in a gas tight unit, being able to handle high temperatures and high pressures as well as aggressive media on both sides. The Caloperm heat exchanger can be delivered on the plate as well as on the shell side as one pass unit or more pass unit.