AlfaVap is a semi-welded heat exchanger designed for rising film evaporation systems involving medias with high concentration and viscosity or as thermosiphon reboiler. It is powerful, robust, thermal efficient and easy to serve.

阿法拉伐AlfaVap半焊接换热器-Alfa Laval AlfaVap semi-welded heat exchanger


  • Maximized heat transfer and energy efficient
  • Minimized fouling and scaling
  • Compact unit easy to install and service
  • Adaptable to changing capacity demands
AlfaVap provides higher thermal efficiency than the traditional shell-and-tube evaporators. The efficient utilization of heat transfer area enables a more compact unit that is easy to install. AlfaVap heat exchangers are cost-efficient especially when exotic metal materials are required.

A bit more in detail 

AlfaVap is a semi-welded heat exchanger, i.e. a plate pack has gasket sealed cassettes of two plates that are welded togetherThe fluid is concentrated in the gasketed channel while the steam passes through the welded channel. These units are ideal for when two media have very small temperature difference as it allows for use of a lower grade steam. In most cases this means cutting energy costs.  

The plate pattern generating high turbulence over the whole plate is specifically designed to optimize evaporation. This maximizes the heat transfer efficiency while minimizing fouling and scaling.  

Due to the plate-and-frame design with tightening bolts and pressure plate rollersAlfaVap is easily accessible for inspection and mechanical cleaning. A low hold-up volume allows for using only a small amount of cleaning chemicals when running a cleaning-in-Place (CIP) procedure. 

The design is made for easy adjustment to changed capacity needs and plate cassettes can easily be added or removed to the existing frame. The flexibility is a major advantage over shell-and-tube units not allowing for capacity adaptations after installation.  

AlfaVap means trouble-free maintenance and a long service life. Glue-free clip on gaskets, pressure plate holder, bearing boxes and the Five-point alignment system makes opening and closing easy, quick and very safe – both in terms of not damaging the plate pack, but also for the personnel

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How it works

AlfaVap is designed for high efficiency rising film evaporation. It has two inlet feed connections located centrally at the bottom of the frame plate and a large outlet for the vapour and concentrate at the top. The heating steam condenses in the welded channels and the evaporating product passes through the gasketed channels.


Part of a broad range of gasketed plate heat exchangers

AlfaCond is a compact, plate surface vacuum condenser. 

Industrial line is an extremely versatile range of heat exchangers for use in all types of industries. 

Industrial semi-welded line is used when gaskets are not suitable for one of the media and when higher design pressures are needed. 

WideGap is a heat exchanger used for applications involving fibrous liquids, highly viscous fluids, and fluids containing coarse particles.

Diabon® is a graphite plate-and-frame heat exchanger used for tough corrosive media.

AlfaQ™ is an AHRI performance certified gasketed plate-and-frame heat exchanger.