Magnetic strips ensure the proper closing of refrigerator and freezer doors. They are usually integrated into a door gasket and ensure that the door is pulled tightly against the cabinet. The cabinet frame typically contains a counter-pole for this: sometimes a magnetic strip of reverse polarity, sometimes a piece of iron that the magnet in the door gasket attracts. If the cabinet frame is made of stainless steel, this counter-pole is often hidden behind the stainless steel, because stainless steel itself is not magnetic. The same applies to a plastic strip: behind it, there is then iron or a magnet.
Mounting strips are used to install door gaskets without a fixed mounting method in the correct position. This occurs, for example, with press-in profiles, where the gasket is secured in the door by means of a groove or strip.
A properly functioning magnet and correct mounting are important for the operation of a refrigerator or freezer door. A worn magnet or damaged mounting strip can lead to a door that doesn't close properly, loss of cold, and extra strain on the cooling system. In practice, a magnet rarely needs to be replaced. Is there a magnet in your door gasket? Then you don't need to order it separately, as it is already integrated as standard.
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Need help finding the right magnet or mounting strip?
When choosing the right magnetic strip or mounting strip, you compare a few simple characteristics: the thickness and width of the strip, and for a magnetic strip, also the polarity. Ensure these match the existing strip or the counter-pole in the cabinet frame, so that the magnets attract each other instead of repelling.
Magnetic Strips
Magnetic strips can be ordered per meter or on a roll of 250 meters. You specify the desired dimensions yourself (short side and long side in cm) and choose a color. Not every magnetic strip is available in the same color: M15, for example, is only available in brown.
How does a magnetic strip work in a door gasket?
A magnetic strip in a door gasket is a permanent magnet with a fixed magnetic direction. This creates a north and south pole. Opposite poles attract each other and like poles repel each other. Therefore, the polarity of a magnetic strip must always match the application for which it is intended.
A magnetic strip can lose its magnetic force due to, for example, strong heating, damage, or prolonged influence from other magnets. Under normal circumstances, however, a magnet remains usable for years.
Different types of magnetic strips
DSU supplies various magnetic configurations in door gaskets. The most common types are:
- M-magnet
An M-magnet has a South-North-South (SNS) polarity. This is the most commonly used configuration. - C-magnet
A C-magnet has a North-South-North (NSN) polarity and is also called a counter-magnet. An M-magnet and C-magnet attract each other. - B-magnet
A B-magnet is a bi-pole version (2-pole). This type is less frequently used. With this type, it is important to check which side should be placed inwards and which side outwards.
When two identical magnetic configurations are placed opposite each other, they can repel each other or shift relative to each other.
Mounting Strips
Mounting strips are used to correctly install PVC, rubber, and silicone profiles. There are different types:
- Mounting strips with a groove for securing press-in profiles
- Mounting strips for installing rubber profiles in cold room doors
The correct mounting strip depends on the type of profile and the existing mounting method. On the product page of the relevant profile, you will find which mounting strip belongs to it.
An example is mounting strip 20-C. This strip is used with specific press-in profiles and, among others, in Fermod refrigeration units. Always check the profile code and dimensions before replacing a mounting strip.
Frequently Asked Questions about Magnets and Mounting Strips
An M-magnet has a South-North-South polarity and is the most commonly used. A C-magnet has a North-South-North polarity and acts as a counter-magnet. A B-magnet is a bi-pole version and is used less frequently.
In many cases, a separate mounting strip can be replaced. However, check whether the new strip is suitable for the existing profile and the way it is mounted in the door.
At DSU, we have over 900 brands, unfortunately there is a multitude of type numbers and new models are constantly entering the market. When the type numbers are known, they are listed on the brand page. If the type number is not known to us, that's no problem. We produce everything to measure. Determine the correct profile and size and use the configurator tool to place the order. Optionally, add the brand and type number to the reference so that we can further complete our information.
