Gasketed plate-and-frame heat exchangers

Taking you beyond the norm

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

Our Gasketed plate heat exchangers are optimizing heat transfer by large surfaces of corrugated plates drawing heat from one gas or liquid to the other. The high efficiency and an outstanding reliability in a compact design, offers an investment with the most attractive CTO over the product life time. Not to forget the energy saving capabilities and low environmental footprint.

HVAC Applications

Alfa Laval AlfaQ™ heat exchangers are used for HVAC applications such as district cooling substations, ice-storage systems, data centers, and free cooling systems. The range is certified according to the AHRI Liquid to Liquid Heat Exchangers (LLHE) Certification Program which ensures thermal performance according to manufacturers’ published specifications.

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. The Industrial line’s versatility allows it to be designed and configured for applications ranging from relatively simple duties with low requirements to very demanding duties with the highest requirements on both performance and documentation.

Hygienic Range

High efficiency and versatile design make the Alfa Laval BaseLine gasketed plate heat exchangers (GPHEs) solid choices for a wide range of hygienic heat transfer applications. This includes the food, dairy, beverage, home and personal care, biotech and pharmaceutical industries, providing owners and operators with peace of mind.

Semi-Welded Line

The Alfa Laval semi-welded industrial range is designed for refrigeration and exacting processes. Semi-welded heat exchangers are used when gaskets are not suitable for one of the process media. Also, the semi-welded line can take a higher design pressure compared to fully gasketed plate-and-frame heat exchangers.

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Local service and support for your gasketed plate heat exchanger

You can trust Alfa Laval technicians to repair and recondition your gasketed plate heat exchangers – no matter the brand. We’ve serviced equipment for over 90 years in New Zealand. Our service centre is outfitted with the equipment and expertise to optimize the performance and life time of your gasketed plate heat exchangers.

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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.

How long will your gaskets last?

GPredict icon

Using Alfa Laval’s proprietary GPredict™ tool, our service advisors can give you a reliable estimate of the expected lifetime of your gaskets. The tool relies on precise calculations based on your specific equipment and relevant application details, including temperature, gasket material, whether you use glued or non-glued gaskets, and how often you open your unit in the course of annual operation.

Alfa Laval’s services advisors will also consider the operating pressure of your duties,
in order to give you a detailed assessment of the leakage risk. This helps you avoid unplanned stops and preventable safety risks in the course of your production.

GPredict™ is a powerful tool that makes it simple to plan the reconditioning of your plates, since you always know when it’s time for regasketing well in advance. Take advantage of GPredict™ with a customized gasket prediction based on your installation* by contacting us today.

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How it works

Plate and gasket technology

The design of the corrugated plates optimizes heat transfer by providing a large but compact total surface area through which the heat can be drawn from one liquid or gas to another.

The heat transfer area of the plates is pressed in a corrugated herringbone pattern. When two plates are superimposed with opposing herringbone patterns, the helix-like flow and high turbulence results in high transfer coefficients and effective self-cleaning.

A change in the corrugation pattern enables the heat exchanger to be used in different processes, even those with very dirty media.

t25 plate 960x480

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.

Learn more about WideGap plate heat exchangers

Semi-welded plates

Enable aggressive and difficult fluids to be handled, and also extend the pressure range.

Learn more about semi-welded plate heat exchangers

Diabon® graphite non-metallic plates

A composite of fused graphite and fluoroplastic provides excellent resistance to corrosive materials.

Learn more about Diabon Graphite non-metallic plates

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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 gasketed plate heat exchanger, the plates are fitted with elastomeric gaskets which seal the channels and direct the media into alternate channels. The plate pack is assembled between a frame plate and a pressure plate, and compressed by tightening bolts fitted between these plates. The channel plates and the pressure plate are suspended from an upper carrying bar and fixed in position by a lower guiding bar, both of which are fixed to the support column. The design allows easy cleaning and simple capacity modification (by removing or adding plates).

gphe parts illustration

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.

Conventional gasketed plate heat exchangers

Hygienic applications

Specific applications

Demand new standards

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