Energy Efficiency in Refrigeration Furniture: A Few Words About the Role of Gaskets

Grafika przedstawiająca modele uszczelek PVC i rysunki techniczne

Do you want to stay up to date? Subscribe to our newsletter and we will notify you of new articles.

Are your electricity bills already too high? Are you worried they might increase even more in the future? Do your refrigeration devices consume a lot of electricity? This could be related to energy losses occurring at the junction of the refrigeration doors and the body of the device, specifically talking about the gasket and seal.

Welded Gaskets/Seals Made of Soft PVC

Key aspects in the production of magnetic gaskets are the material and the quality of the seal’s craftsmanship. Gaskets and seals produced at AiFO Components are made through the extrusion process of soft PVC plastics. In addition to PVC (polyvinyl chloride), TPE (thermoplastic polyester elastomer) is also used in the manufacturing. Our range includes multi-chamber seals, which depending on the mounting method, are pressed, glued, or screwed to the profile. Particularly, the first solution is highly regarded for its convenience and speed of installation.

But what are gaskets? A gasket is a simple element – a type of sealing – with a specific shape and dimensions. Seals used in refrigeration, specifically in refrigeration furniture, are made, among others, from soft PVC. The gasket is placed in the refrigeration door profile, at the junction with the body of the refrigeration furniture, and allows for achieving the appropriate tightness.

The variety of seal models produced at AiFO Components makes it easy to choose the right model for a specific profile. Gaskets work well in contact with various materials.

Thermal Conductivity of the Material

The heat conduction coefficient λ (lambda) is the amount of thermal energy flowing through a certain mass of the sample, due to an external temperature difference. It is one of the most important characteristics of insulating materials. The lower the value of λ (lambda), the less the material conducts heat, and therefore, the better it insulates against heat loss. Values of the heat conduction coefficient for selected materials in average humidity conditions according to PN-EN 12524 [W/(mK)] are as follows:

No.Material:Heat conduction coefficient in average humidity conditions according to PN-EN 12524 [W/(mK)] [W/(mK)]
1Aluminum alloys200
2Stainless steel17
3EPDM0,25
4PVC0,17
5Flexible PVC with 40% softening agent0,14
6Polyurethane foam (PU)0,05
7Air0,025
Table 1. Heat conduction coefficient values for selected materials

Soft PVC Seals

Gaskets made through the extrusion process from soft PVC at AiFO Components are widely used, thanks to properties that meet the stringent standards of the refrigeration industry.

Properties of PVC Gaskets:

  • Multi-chamber profile – provides better thermal insulation and increases the tightness of adherence to the body.
  • Shock absorber – ensures contact during the closing of doors or drawers with the body and a tight fit to the body profile.
  • Quality of weld – a properly executed welded connection should be smooth and ensure the tightness of the seal at the corner.
  • Magnet – a built-in magnet attracts the seal to the magnetic element installed in the profile of the refrigeration furniture body. The magnet is located in a special pocket, which is an integral part of the gasket. This solution translates into high matching and quality. The customer can choose the magnet’s polarization and the strength of attraction.
Thermal insulation
Fig. 1. Construction of a multi-chamber magnetic gasket at AiFO Components

The graphic above presents a cross-section of refrigeration doors in the device and the principle of thermal insulation operation in the case of profiles and gaskets made of PVC. The drawing easily shows that energy losses are minimized, thanks to the properties of the gasket and its matching to the profile and tight adherence to the device body.

Proper Storage

At AiFO Components, we care at every stage of the process, from production to transport, to prevent gaskets from deforming. It is important to us that the product arrives in one piece to the customer in an undamaged state.

Graphic showing the step of packing a magnetic seal into a specially designed package.
Fig. 2. Proper protection of seals packaged for the customer at AiFO Components warehouse

Appropriate storage of gaskets will protect them from deformation and dimensional changes, simultaneously ensuring excellent usability properties. Seals should be stored in dry and properly ventilated rooms, avoiding situations where the packaging may be deformed due to excessive humidity or improper storage.

The ideal storage temperature for gaskets ranges from 5 to 35°C. The air humidity should be at around 60%. Lower temperatures can lead to increased stiffness of the seal, while higher temperatures can cause dimensional changes. The proper temperature of the gasket before installation should be from 20 to 25°C. Seals must be kept in the original packaging in which they were delivered. It’s permissible to store outside the original packaging on specially designed stands, where the top and bottom parts of the gasket will be supported.

With proper handling, it’s easy to see that the list of advantages is long, and the seals offer a range of benefits. The basic benefit is the fact that PVC material is relatively inexpensive to produce. This makes it widely used in the refrigeration industry. However, this is not the only benefit of choosing gaskets made of polyvinyl chloride. Other important advantages include:

  • Good chemical resistance (including acids, alkalis, oils, inorganic compounds);
  • Good resistance to UV radiation;
  • Good insulating properties;
  • Flexibility;
  • Low cost.
Seals and technical drawings
Fig. 3. Seals and technical drawings

We warmly invite you to explore the wide range of products at AiFO Components. The full offer of gaskets and seals is available in our “Profiles for Refrigeration Furniture” catalog and in our B2B store.

We encourage you to sign up for our NEWSLETTER, so you can follow current trends and stay up-to-date with our offer.

In case of any doubts, our technical advisors will be happy to answer all your questions. Contact details via email, phone, or the contact form are available in the CONTACT page.

Knowledge base

See
our
catalogues

Piktogram prezentujący nowości produktowe

New products

Product innovations are a product group that includes new components and solutions. It’s regularly updated as we try to keep up to date with new technologies and current market trends.
Piktogram prezentujący systemy podnoszenia szyb

Lift-up systems

Glass lift-up systems for refrigeration equipment, such as refrigerated display counters, allow easy access to products while presenting them in an excellent way. You can found here complete kits and other necessary components.
Piktogram prezentujący komponenty do komór chłodniczych

Components for cold rooms

Cold room components include products that enable the cold room to function properly. These include refrigerated doors, shelving systems, profiles, gaskets, hinges, handles and decompression valves.
Piktogram prezentujący systemy drzwiowe AiFO

AiFO door systems

Door systems are the solutions we manufacture for refrigeration equipment. This group includes: glass doors for refrigerated cabinets in hinged and sliding versions, Semi Vertical and doors for refrigerated chambers.
Piktogram prezentujący profile do mebli chłodniczych

Profiles for refrigeration furniture

Profiles are created using an extrusion process and are made from a variety of plastics. This allows for a wide variety of applications. We offer profiles for eliminating thermal bridges, door profiles, profiles for glass covers, profiles for lamps, price strips and other profiles and gaskets.
Piktogram prezentujący komponenty

Components for refrigeration furniture

Refrigeration furniture components include many parts that are key to the proper operation of refrigeration equipment. Condensers, evaporators, compressors – these are what keep temperatures down.
Piktogram prezentujący komponenty do

Components for neutral furniture

Neutral furniture components are products for the HoReCa sector, mainly for catering. This product group includes catering faucets, sink chambers and parts for neutral furniture.
Piktogram komponenty folder zastosowań

Components usage examples

Catalogue graphically presents examples of the use of our components in equipment, furniture and cold rooms. Refrigerated display counters, refrigerated shelving, vending machines, cold rooms, serving lines – these are just some examples of the applications of our components.