Gasketed plate-and-frame heat exchangers
Alfa Laval doesn’t do average. Whether it is our multi-purpose Industrial range; the Semi-welded industrial range for refrigeration and exacting processes; the Hygienic range for food, beverage and pharma applications; or the Specialized range for condensation, evaporation and fibrous media – you buy into reduced cost of ownership and increased efficiency and safety.
Gasketed plate heat exchangers for modern requirements
- Highest thermal efficiency and close temperature approach
- Compact units - space saving, easy to service and maintain
- Maximum uptime - less fouling, stress, wear and corrosion
- Flexible - easy to adapt to changed duty requirements
Product manuals
Download the manuals for a wide range of Alfa Laval gasketed plate and frame heat exchangers here, including our Industrial Line, Semi-Welded Line, AlfaQ and Hygienic range.
Industrial line
Our wide range of industrial gasketed plate heat exchangers is suitable for all types of industry and multiple applications from heating, cooling and heat recovery to condensation and evaporation.
Demand new standards
Introducing the world’s most modern gasketed plate heat exchangers. Discover how our next-generation line of gasketed plate heat exchangers will bring you higher efficiency, better reliability and greater serviceability.
Best plates for heat exchanger applications
Plates are available with various pressing depths, angles of chevron pattern and various corrugation shapes, all carefully designed and selected to achieve optimal performance. Depending on the application, each product range has its own specific plate features.
When two plates are superimposed with opposing herringbone patterns, this type of corrugation generates a helix-like flow with very high turbulence, thus producing the essential condition for achieving high transfer coefficients and effective heat exchanger self-cleaning. By changing the plate corrugation pattern, the heat exchanger can be used in different processes, even those with very dirty media, to avoid stagnant zones and fouling.
While high flow turbulence between plates results in higher heat transfer, the consequence is pressure drop. Our thermal design engineers can help you design and select the model and configuration that is suitable for your application so that it delivers maximum thermal performance with minimum pressure drop.
Distribution area
The plate distribution area ensures an even flow of fluid over the entire plate to maximize the heat transfer capability. An optimized flow distribution also reduces fouling and uneven temperature zones keeping the performance levels high over time without unnecessary energy losses, maintenance costs or unplanned stops.
Gaskets are key components in heat exchanger performance. We design the gasket and plate as one to assure an optimized seal. Each is tailored to the duty of the heat exchanger. The correct profile, width, thickness, and polymer type and compound make a world of difference in avoiding the risk of premature leakage or gasket or plate damage. Your benefits are prolonged gasket life, less downtime and lower maintenance costs.
Gasket profile
Gasket glue
Special plate types
Double-wall gasketed plate heat exchangers
Designed for use with fluids that cannot be allowed to mix. Prevents leaking fluid coming into contact with the fluid in the other circuit.
Wide-gap plates
Ideal for fluids containing fibers or coarse particles. Designed to eliminate bridging of solids in the entrance area.
Semi-welded plates
Enable aggressive and difficult fluids to be handled, and also extend the pressure range.
Diabon™ graphite non-metallic plates
A composite of fused graphite and fluoroplastic provides excellent resistance to corrosive materials.
How plate heat exchangers work
The concept behind a heat exchanger is relatively simple – heating or cooling one medium by transferring heat between it and another one.
In a liquid-to-liquid heat exchanger, heat is transferred from the hot media to the cold media as fluids pass through the heat exchanger. Counter current flow enables maximum heat recovery possibilities and very close temperature approach can be achieved. Temperature cross is also possible, meaning that the hot outlet can reach a lower temperature than the cold outlet. This can only be achieved to a limited extent with tubular heat exchangers making plate-and-frame heat exchangers more thermally efficient.
For heat sensitive or viscous media, co-current flow can be used to let the coldest fluid meet the hottest when entering the heat exchanger. This minimizes the risk of the media overheating or freezing.
The heat transfer area of a gasketed plate heat exchanger consists of a series of corrugated plates, assembled between a frame and pressure plates to retain pressure. Gaskets act as seals between the plates. Fluids normally run counter-currently through the heat exchanger. This gives the most efficient thermal performance and enables a very close temperature approach, ie the temperature difference between the exiting process medium and the entering service medium.
For heat sensitive or viscous media, co-current flow can be used to let the coldest fluid meet the hottest when entering the heat exchanger. This minimizes the risk of the media overheating or freezing.
Plates are available with various pressing depths, angles of chevron pattern and various corrugation shapes, all carefully designed and selected to achieve optimal performance. Depending on the application, each product range has its own specific plate features.
The distribution area ensures fluids are evenly distributed across the entire heat transfer surface and help avoid stagnant zones that may cause fouling.
While high flow turbulence between plates results in higher heat transfer, the consequence is pressure drop. Our thermal design engineers can help you design and select the model and configuration that is suitable for your application so that it delivers maximum thermal performance with minimum pressure drop.