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Spiral condenser / evaporator – type 2



The vapor circulates, cross flow, in a fully opened channel, with negligible pressure drop and the coolant circulates in a closed spiral channel.

Thanks to its versatile design, it can be directly installed on the top of a column/rector without any supporting system, reducing quite much installation costs.

It is perfectly suitable for vacuum condensation with negligible pressure drop. It can be used as vent condenser.


The fluid to evaporate circulates in an adjusted channel gap, fully opened, that allows working with fouling fluids. It also allows easy access for an inspection or an eventual mechanical cleaning.

Negligible pressure drop

Thanks to the cross flow on the steam / vapour side there is nearly no pressure drop (we are in a range of 0.1 kpa)

Condensation under vacuum

With a very low pressure drop, this allows spiral heat exchangers to process under complete vacuum conditions.

Sub-cooling of inerts and/or condensates

We can set up different mechanical constructions to subcool (or not) inerts and condensates

Column mounted

Spiral heat exchangers can be directly mounted at the top of the distillation column / reactor without any supporting system

Steam heater

Spiral heat exchanger is made to handle cycling duties, thanks to its robust construction. Nexson spiral heat exchanger can expand without mechanical failure during the pressure or temperature increase. That’s why the spiral heat exchanger is used as a steam heater.

Low maintenance cost

Nexson spiral heat exchangers are designed to maximize heat transfer surface. They can be set up vertically or horizontally with no need for complex installation. In addition maintenance costs are very limited.

Standard or customized

Nexson spiral heat exchangers can be either customized or you can go for standard models. The standard range gives you the opportunity to discover the spiral heat exchanger technology at a very limited cost and with a short delivery time while offering similar quality and a made in France production.

Heat transfer area surface

Heat transfer area available from 2 to 3000m².

Traditionally used as

  • Vacuum condenser
  • Overhead condenser
  • Gas cooler
  • Reflux condenser
  • Vent condenser
  • Steam heater

Associated products

Green Spiral – Type 2

Biphasic application – Column

Read more

Green Spiral – Type 3

Steam heater

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