How to restore old cast iron batteries and delay their replacement for a long time. Gaskets for heating radiators Intersectional gaskets for heating radiators

To create reliable sealed joints between sections of heating radiators, various types of gaskets are used. The element must have a number of specific properties that provide a secure service for a certain time.

Product varieties

In most cases, all components are purchased when buying the batteries themselves. AT hardware store consultants must know what gaskets will be required for bimetallic radiators, and which ones are needed for cast iron products. But often the buyer goes exclusively for spare parts. Therefore, it does not hurt to prepare in order to acquire what you need.

Paronite elements

They are made from pressed rubber with the addition of asbestos fibers and powdered substances.

Intersection radiator gasket of this type most often used in apartments with central heating.

Holds up great temperature regime at + 85-100º.
The most popular is the product made according to GOST No. 15180-86. For production, paronite PMB, PON-B and PK, as well as reinforced paronite, are used.
Products are made by cutting on a press or cutting with circular scissors, as well as a plotter.

General Purpose Paronite Gaskets

Such seals are effective for pipelines with liquid and gaseous carriers.

Note!
Such gaskets for cast iron radiators are used in pipes with water, steam, various solutions, and oils.
Do not react to inert gases, ammonia in different states, alcohol, nitrogen, oxygen.

They are designed for temperatures from -50º to +450º.
Are supplied with marking PON-B and GOST No. 15180-86.

Oil and petrol resistant analogues

It is recommended for pipelines transporting oily liquids and gases.
They are best used where the coolant passes, which is technical oil, as well as petroleum products, hydrocarbons in a liquefied or gaseous state, molten wax, coke oven gas, nitrogen, oxygen.
Temperature range from -50º to +450º.
Marked as PMB.

Acid resistant modified rubber

Maintains tightness in areas that carry aggressive compounds, such as antifreeze.
Gaskets work effectively when in contact with acids and alkalis, solvents organic origin and various gases.
Withstand from -50º to +250º.
Supplied with PC brand.

Reinforced products

Reinforcing mesh pad for cast iron radiator mounted in the intersectional space of household batteries as well.
Steam, water, various gases, oily substances perfectly holds the sealant.
Temperature range -50º to +450º.
PA marked.

Other types of gaskets

Less commonly used, but no less effective seals, just like those described above, are suitable not only for domestic purposes.

A modern intersectional gasket for a radiator does not collapse even when exposed to aggressive substances.

Silicone accessories can withstand fairly high temperatures. Due to their good plasticity, they successfully compensate for the expansion of metal sections under the influence of heat. They are more common in systems with low pressure and loads.
Fluoroplastic analogues are made from heat-resistant polymers. Do not require additional lubricants, do not react as hot water as well as antifreeze.
Cardboard liners are also in demand. They are impregnated with oil paint to enhance the service life and positive properties. More often, the instruction recommends installing them in the spaces between the sections in bimetallic and aluminum batteries.

Good selection of seals

For mounting batteries in a private house or apartment, experts advise purchasing silicone or paronite seals. It is undesirable to make gaskets with your own hands, especially from improvised materials.

This can lead to rapid depressurization of the joints. Spend a small amount on finished products, especially since the price will definitely not hit the wallet.

Products have certain sizes. This is both the thickness and the diameter of the outer and inner circle. Make sure that the diameters of the rings and the outlets of the pipes match.

Note!
The "margin" seal, whose edges protrude too much, will soon become unusable.
Therefore, take strictly according to size.
The thickness of the inserts for cast iron batteries is 1.5-2 mm, for bimetallic and aluminum batteries - from 1 to 2 mm.

Self-assembly of sections

The gasket directly seals the nipple.

Intersectional radiator gasket serves as a sealing element in these heaters. It prevents leaks at the junction points of the sections, thereby extending the battery life and improving the quality of heating.

Product types

At the moment, such gaskets are produced for cast-iron heating radiators, as well as bimetallic and aluminum analogues.

What manufacturers offer

Pictured is silicone.

silicone gaskets can withstand high level coolant temperatures. They compensate well for the thermal expansion of the metal. They are usually used in autonomous heating systems with low working pressure.
Paronite analogues made of compressed rubber with the addition of asbestos and a special powder. They withstand high temperatures up to 90-100 degrees, typical for communal heating systems. Paronite intersectional gasket for radiator can seal cast iron, aluminum and.

Below is a table of sizes of products manufactured according to GOST No. 481/80.

Fluoroplastic gaskets for bimetallic radiators and aluminum analogues are made of heat-resistant plastic. They are installed without additional lubrication. Products have high temperature resistance, withstand high pressure levels and are resistant to aggressive environments.

The table below represents products made according to GOST No. 10007/80.

Cardboard products manufacturers produce according to GOST No. 9347-74 and impregnate with oil paint to increase the service life. They are used in autonomous heating systems with bimetallic or.

Product selection

When thinking about which pads to choose, take into account their material as well as size.

This concept includes:

internal diameter of the product (d);
outer diameter (D);
product thickness (S).

Note!
The diameter of the products must exactly match the size of the inlet of the sections.
During installation, it is best if the edges of the gaskets do not protrude.
Otherwise, leaks are possible.

Manufacturing methods

The instruction divides seals for radiator sections into flat and volumetric counterparts necessary for different designs conjugations.

Flat seals are made from sheet materials (paronite, rubber, leather, plastic) by punching with the help of stamps, punching knives. Cutting with lasers and circular knives is also used.
Volumetric gasket for cast iron radiator and analogs from other metals is produced by thermoforming from polyvinyl chloride or vulcanization from raw silicone and rubber.

Die-cutting

The price of the stamps themselves is high - these are complex fixtures that consist of many elements made very accurately. In addition to them, a press is needed to work, a stamp is placed on it.

Before the manufacturing process, the dimensions of the gasket are taken into account. The larger it is, the more massive the stamp, and the more powerful the press.

Note!
This method of manufacturing seals is high-speed and quite cheap.
Therefore, it is optimal for mass production.

Punching with punching knives

This method is similar to the previous one, but the tool is simpler and cheaper. The manufacturing process is inexpensive and fast. But the pants do not last long, because of this, the method is optimal for the manufacture of medium and small batches of seals.

Cutting with circular knives

This method is used to make large and only round gaskets.
Here you need special equipment, it is relatively cheap and has high performance.
As cutting devices, standard blades are used.
These circumstances make it possible to produce seals with your own hands in any quantities.

Laser cutting

AT this case no need to buy special tool. Gaskets of any shape can be produced on standard machines.

This method could become one of the most profitable, if not for one drawback. Not all materials can be cut with a laser without problems. The only way out is to significantly reduce the cutting speed, this makes the process more expensive.

Thermoforming

For this method you need an injection molding machine with a mold for casting products. The molding press is quite expensive. To "recapture" its cost, the production of thermoformed seals must be large-scale, serial or mass.

For small batches, the technology is appropriate only when gaskets cannot be produced in any other way. It should be noted that this method can only produce PVC products.

Vulcanizing

Vulcanization of products is carried out on thermo-presses in special molds. Such forms are not as expensive as analogues for injection molding machines. This reduces the cost of products.

At the same time, the vulcanization technology itself is long, which affects the cost of production. However, high-quality gaskets made of silicone and rubber cannot be obtained in another way.

Conclusion

Without high-quality intersectional seals it is impossible to operate heating radiators. They are divided into several varieties and this must be taken into account when installing gaskets. The video in this article develops her theme.

These elements seal the interfaces of sections in heating batteries.

Product types

At the moment, such gaskets are produced for cast-iron heating radiators, as well as bimetallic and aluminum analogues.

What manufacturers offer

Pictured is silicone.

silicone gaskets can withstand high temperatures. They compensate well for the thermal expansion of the metal. They are usually used in autonomous heating systems with low operating pressure.
Paronite analogues made of compressed rubber with the addition of asbestos and a special powder. They withstand high temperatures up to 90-100 degrees, typical for communal heating systems. Paronite radiator intersection gasket can seal cast iron, aluminum and bimetallic batteries heating system.

Below is a table of sizes of products manufactured according to GOST No. 481/80.

Fluoroplastic seals.

Fluoroplastic gaskets for bimetallic radiators and aluminum analogues are made of heat-resistant plastic. They are installed without additional lubrication. Products have high temperature resistance, withstand high pressure levels and are resistant to aggressive environments.

The table below represents products made according to GOST No. 10007/80.

Cardboard products manufacturers produce according to GOST No. 9347-74 and impregnate with oil paint to increase the service life. They are used in autonomous heating systems with bimetallic or aluminum radiators heating.

Product selection

Product sizes.

When thinking about which pads to choose, take into account their material as well as size.

This concept includes:

internal diameter of the product (d);
outer diameter (D);
product thickness (S).

Note!
The diameter of the products must exactly match the size of the inlet of the sections.
During installation, it is best if the edges of the gaskets do not protrude.
Otherwise, leaks are possible.

Manufacturing methods

The instruction divides the seals for radiator sections into flat ones and three-dimensional counterparts required for different interface designs.

Flat seals are made from sheet materials (paronite, rubber, leather, plastic) by punching with the help of stamps, punching knives. Cutting with lasers and circular knives is also used.
Volumetric gasket for cast iron radiator and analogs from other metals is produced by thermoforming from polyvinyl chloride or vulcanization from raw silicone and rubber.

Die-cutting

Stamping machine.

The price of the stamps themselves is high - these are complex fixtures that consist of many elements made very accurately. In addition to them, a press is needed to work, a stamp is placed on it.

Before the manufacturing process, the dimensions of the gasket are taken into account. The larger it is, the more massive the stamp, and the more powerful the press.

Note!
This method of manufacturing seals is high-speed and quite cheap.
Therefore, it is optimal for mass production.

Punching with punching knives

Cutting with circular knives

This method is used to make large and only round gaskets.
Here you need special equipment, it is relatively cheap and has high performance.
As cutting devices, standard blades are used.
These circumstances make it possible to produce seals with your own hands in any quantities.

Laser cutting

In this case, there is no need to purchase a special tool. Gaskets of any shape can be produced on standard machines.

Thermoforming

Thermoplastic automatic.

For this method, an injection molding machine with a mold for casting products is needed. The molding press is quite expensive. To "recapture" its cost, the production of thermoformed seals must be large-scale, serial or mass.

For small batches, the technology is appropriate only when gaskets cannot be produced in any other way. It should be noted that this method can only produce PVC products.

Vulcanizing

Vulcanization of products is carried out on thermo-presses in special molds. Such forms are not as expensive as analogues for injection molding machines. This reduces the cost of products.

At the same time, the vulcanization technology itself is long, which affects the cost of production. However, high-quality gaskets made of silicone and rubber cannot be obtained in another way.

Conclusion

Without high-quality intersectional seals, it is impossible to operate heating radiators. They are divided into several varieties and this must be taken into account when installing gaskets. The video in this article develops her theme.

After ten years of service, cast-iron batteries look so that it is simply painful for the owners to look at them. The paint wears off and peels off, plaque appears on the places of nipple connections, sometimes radiators leak due to wear of intersection gaskets. Owners are starting to seriously think about replacing heating appliances. But what to buy? Bimetal is expensive, aluminum and steel will last much less. Thoughts again return to cast-iron radiators. But they already are! If you find the time and effort to restore cast iron batteries, they will look and work as good as new ones. So why pay more?

Updated cast-iron batteries will last for decades

What to do if the intersectional gaskets of the radiators are worn out

Gaskets - weakness in sectional batteries. Their task is to prevent the coolant from flowing out of the radiator. Most often there are paronite gaskets, but in older models they are rubber, sometimes for tightness the joints are wrapped with tow with paint. When the material wears out, ugly rusty streaks appear, the battery may begin to drip. This is not a reason to throw away the heating device, because you can simply replace the gaskets. This will require strength, time, patience and the ability to handle tools. Financial expenses minimal.

Preparatory work - cleaning of internal channels

Over the years, batteries have accumulated a huge amount of dirt. It enters the internal channels along with water and sticks to the walls. The formed growths worsen the heat transfer of heating devices. That's why restoration work start by flushing the radiators. The batteries are removed, transferred to a bath or outdoors and thoroughly rinsed from a hose connected to faucet. If the procedure is carried out in the bath, then it is necessary to put a grate on the drain. Get ready for a frightening discovery: the canals turn into a real trash can.

The inside of the battery looks something like this. No need for flushing

How to disassemble an old cast iron radiator

After cleaning the internal channels, the battery is disassembled. For this you will need:

workbench or boards for workplace equipment;
radiator key and plumbing No. 2 or 3;
hammer and chisel;
blowtorch;
brush with metal bristles.

The battery is placed on a workbench or boards and the joints between the sections are heated. blowtorch. Over the years of work, the materials of the compounds stick. Due to heating, microcracks appear in the gaskets, making the joints easier to disassemble. Remove the plugs from the radiator and unscrew the sections. This must be done carefully and evenly, gradually unscrewing the nuts from above and below, otherwise the cast iron may burst due to distortions. Sometimes nipples have to be knocked out with a hammer and chisel.

Wrench for radiator plugs and adapters

Replacing gaskets and assembling the heater

After disassembling the radiator, change the gaskets and reassemble the sections. It is better to replace the gaskets with paronite ones. They will last the longest. If you can't get them, use sanitary flax. It is wound on a thread: on the right - clockwise, on the left - against. As additional protection from leaks use special sealants. If the coolant has a chemically aggressive composition (for example, antifreeze is used), then you will have to choose a stable sealant, only paronite gaskets should be used. The radiators are assembled in the reverse order, only the direction of rotation of the key changes.

There are several types of gaskets for radiators, paronite ones are the most reliable of them.

How to achieve an aesthetic appearance of old batteries

With the inside of the batteries cleaned and any worn gaskets replaced, the feature upgrade is now complete. Time to get busy appearance so that the heaters fit well into the interior. To do this, it is enough to paint them. If desired, the batteries are decorated with original painting, decoupage images or simply covered with special screens. But you have to paint anyway. It is important to choose the right paint composition and follow the application technology.

The subtleties of choosing radiator paints

Increased requirements are placed on paints for radiators. They must be resistant to high temperatures, wear-resistant, safe. It is also important that the coating does not reduce the thermal conductivity. Manufacturers offer the following compositions:

These are organic paints. They make it easy to create beautiful coverage with glossy sheen. The disadvantage is a strong smell. Until the paint dries, a specific aroma will be felt in the room.

Advantages - big choice shades, good performance characteristics, durability. The only downside is the smell. Moreover, it can appear with strong heating of the batteries during the heating season.

They are often chosen for their lack of odor and fast drying. When buying, pay attention to the manufacturer. There must be a note on the bank that the paint is intended specifically for heating radiators.

They are sometimes bought for batteries, but this is the worst choice. Oil formulations have many disadvantages. They dry for a long time, smell strongly, change color, reduce the heat transfer of radiators.

Make sure the paint you choose is marked "For Radiators" and "Heat Resistant"

Paint application technology for radiators

The coating must be removed before painting. The stores sell special washes for paints, you can use them. In theory, washes help clean batteries, but in practice their effectiveness leaves much to be desired, because the paint literally sticks to surfaces under the influence of high temperatures. It is better to heat the coating with a blowtorch or building hair dryer, clean with a spatula and a brush with metal bristles. Then the surface is sanded sandpaper and degrease.

You need to paint like this:

First, paint the inner surfaces so that there are no streaks on the front of the battery.
The brush or roller leads from the bottom up.
Sagging is removed immediately, until the paint has thickened.
The coating is applied to the entire surface of the radiator, it is not necessary to leave unpainted areas.
You can make a single layer coating, but it is better to paint in two layers to achieve greater strength.

Ombre cast iron floor standing radiator

An old cast-iron radiator is capable of creating comfort in the house for several decades. Do not throw away the device if it has lost its presentable appearance and has become worse to heat. All problems are solvable. Refurbish the battery, show your imagination - and heater will work and look as good as new.

How to restore old cast iron batteries and delay their replacement for a long time

Flushing, disassembly and assembly of cast-iron batteries, replacement of intersection gaskets. How to choose the right paint for radiators and restore cast iron batteries.

Source: teploguru.ru

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Gaskets for heating radiators: varieties, problems, replacement method

What are gaskets used for when installing heaters? Which of the gaskets sold in plumbing stores is better? Is it possible to make them from improvised materials yourself? Finally, how to properly install or replace them? Let's figure it out.

Gaskets have long ceased to be a shortage: desired products can be found at any plumbing store.

Application

The products we are interested in are used in two ways:

Intersectional radiator gasket ensures the tightness of the connection of sections. It is pulled together by a nipple - a short tube with opposite threads - and is clamped between the cut planes of the upper and lower collectors.
In addition, gaskets are used when installing radiator plugs on aluminum and bimetallic heaters.

However: in the latter case, they can be replaced by winding.
It can be used as sanitary flax impregnated with silicone or paint, FUM tape or polymer sealant thread.

Varieties

Gaskets for cast iron heating radiators are made from paronite (heat-resistant hard rubber) in accordance with the requirements of GOST 15180-86. The standard regulates the main dimensions of products (by the way, not only paronite ones) and their mass in batches of 1000 units.

Paronite gasket for cast iron sections.

Gaskets for bimetallic radiators and aluminum batteries can be made from both paronite and heat-resistant silicone.

Which of the two materials is more preferable?

It is difficult to give a definite answer.

Paronite, due to its rigidity, more effectively resists internal pressure coolant;
Silicone, on the other hand, does not lose elasticity over time and requires less tightening force to securely seal the joint.

Pictured is silicone.

Dimensions and shape

The paronite gasket for a cast iron radiator is always in the form of a flat ring.

Products designed for aluminum and bimetallic batteries can be in the form of both a flat ring and a toroid (donut).

Note: Toroidal silicone gaskets are used to seal the annular grooved sections.
If you try to squeeze them between sections or between a cork and a section with a flat surface, you will encounter the fact that the silicone will extrude.

Silicone gasket in the form of a donut, it is installed only in radiators with an annular groove on the sections.

The diameter of the hole in the flat gasket is determined by the type of radiator and the diameter of the nipple. The nipple is supplied with a thread of the following sizes:

Self-manufacturing

Intersection gasket for any type of radiator can be made independently. Yes, the price of these products is low; however, sometimes a long distance to the store, a weekend or a holiday can make you think about looking for alternatives.

The material for us will be a conventional chamber for a pneumatic tire:

Automotive - for a cast-iron battery;
Bicycle - for aluminum / bimetallic.

For cutting, ordinary scissors are used; the contour is preliminarily transferred to a chamber cut lengthwise and laid out on a flat table with a ballpoint pen.

If you have an old camera and sharp scissors, you don't have to go to the store.

However, if you need to make a large number of gaskets, it makes sense to speed up the procedure for their manufacture by making a punch from a segment sharpened on one side heating pipe appropriate size (DN32 or DN25).

The list of typical problems with radiator gaskets is short:

When installed under a cork, paronite or silicone can be extruded one-sidedly. This happens especially often in cases where the axis of the thread of the plug or section has deviations from the perpendicular to the plane of the end face of the collector.
Paronite during long-term operation in conditions of strong heating somewhat loses its elasticity. As a result, after several tens of heating-cooling cycles of the sections, the intersectional gaskets can leak when the batteries cool down again: lowering the temperature leads to a slight change in the linear dimensions of the sections.

Leak of a cast-iron battery between sections.

Installation and replacement

Under the cork

How to install a gasket under the radiator cap with your own hands aluminum battery?

Lubricate the end face of the section manifold and the flat of the plug with any neutral grease. Suitable silicone plumbing grease, grease and even liquid soap.
Slide the gasket onto the threads of the plug.
Tighten the plug with a nut or wrench. Paronite is contracted until the moment when the effort becomes noticeable (but by no means insurmountable: you risk breaking pipe thread in the section header). Silicone is pulled together until the edges are visible from under the cork.

Intersectional

Instructions for eliminating intersectional leaks are somewhat more complicated.

The diagram will make it clear how the sections are connected.

Shut off the heating riser and unscrew the plugs or open the vents. If there are valves on the connections to the battery, just close them.
Substituting a basin or other container with low walls under the bottom blind radiator plug, unscrew the plug a few turns and let the remaining water drain. Unscrew the plug completely; if necessary, use a stick or any other handy tool to free the lower manifold from dirt.

Attention: on blind plugs, in most cases, the left-hand thread; they unscrew clockwise.

Repeat the operation with the top plug.
Mark on the radiator key the distance from the edge of the battery to the nipple you need.
Insert the key into any of the manifolds and, turning, insert it into the radiator until it engages with the desired nipple.
Loosen one turn. The direction of rotation is the same as that of the cork.
Repeat the operation with the nipple on the second manifold.
Unscrew the nipples, making one turn at a time in turn. Misalignment with uneven unscrewing will jam or tear the nipple.
Remove the end sections; put new gaskets on the nipples and thread the nipples on one thread.
Install the end sections, press them to the nipples and wrap the latter with a wrench until they are securely engaged.
Assemble the heater in the reverse order.

Bulkhead of a cast-iron battery.

Conclusion

As you can see, the installation operations are not difficult and, if necessary, can be performed by a beginner. The video in this article, as usual, will share additional thematic information with you. Good luck!

Gaskets for heating radiators: varieties, problems, replacement method

Gaskets for heating radiators: do-it-yourself video installation instructions, features of intersection products for bimetallic, cast-iron batteries, which

For tight and high-quality connection of heating radiator sections, special sealing gaskets are used. They allow you to significantly extend the life of radiators and avoid leakage of coolant from heating circuit. About what kind of gaskets are for radiators, and will be discussed later in the material.

On the modern market you can purchase a gasket for a heating radiator of absolutely any kind - from cast iron, aluminum or bimetal.

Depending on the material of manufacture, the following types of products are distinguished:

Silicone gaskets. These products are resistant to high temperatures coolant and well compensate for the thermal expansion of the metal. These gaskets are usually used for autonomous systems heating with low operating pressure.
Paronite products. They are made from pressed rubber with the inclusion of asbestos and a special powder. Such gaskets are used in radiators connected to centralized system heating, where the temperature of the coolant can rise to 90-100 ℃. Paronite gaskets are suitable for cast iron radiators, as well as for aluminum and bimetallic products.
Fluoroplastic gaskets. Produce this kind of products from heat-resistant plastic. They are intended for installation on bimetallic and aluminum radiators, and without pre-lubrication. They are distinguished by high heat resistance, resistance to aggressive factors and pressure drops.
Cardboard spacers impregnated with oil paint for durability are used for aluminum and bimetallic radiators in autonomous heating systems. The production of products is regulated by GOST No. 9347-74.

When determining which gaskets to use for heating, it is necessary to take into account not only the material from which they are made, but also the size.

The size of the product is determined by the following indicators:

inner section of the gasket (d);
outer diameter (D);
product thickness (s).

It should be noted that the internal section of the intersection gasket for the radiator must completely match the size of the inlet on the radiator section. It is also desirable that the edges of the gaskets do not extend beyond the section - otherwise, coolant leakage is possible in these places.

In their form, gaskets for cast iron batteries can be flat or convex. They are used for different types structures.

In particular, flat sealing elements are made of sheet materials such as plastic, rubber, paronite or leather. In their production, methods such as cutting with a die or punching knives, as well as cutting with a laser or circular knives are used.

The domed gasket for the cast iron radiator and any other metal type of batteries is produced by hot forming from PVC, as well as by vulcanizing raw silicone or rubber.

In the process of work, special stamps are used, that is, special devices that are precisely fitted to right size and consisting of several elements. In addition, a press is used to cut blanks, on which a stamp is installed.

Before starting production, it is necessary to take into account the dimensions of future gaskets - for large products, you will need a more massive die and a powerful press.

It should be noted that this method of manufacturing gaskets is considered cheap and highly productive. Because of this, it is used for mass production.

The principle of operation of this method is similar to punching with a stamp, however, in this case, a simpler and less expensive tool is used. The production of seals in this way is inexpensive and fast enough. However, the pants are quite short-lived, so this technique used for the production of small and medium batches of gaskets.

Only round seals can be produced in this way. large sizes. In the process, you will need fairly cheap and high-performance equipment. Cutting is carried out with standard blades. Therefore, the production of gaskets of this type can be carried out independently and in any volume.

In the presence of software, using standard laser machines, it is possible to produce sealing gaskets of any shape and size.

However, the method has one small flaw- Not all materials can be easily cut by a laser. To cope with denser materials, the cutting speed must be reduced, which significantly increases production costs.

In this case, you will need an injection molding machine with a mold for casting products. The cost of a molding press is quite high, therefore, to make production economically viable, the production of gaskets in this way must be large-scale or even mass-produced.

The production of products in small batches using this technology is relevant only if it is impossible to manufacture them in any other way. It is noteworthy that only PVC seals are produced by thermoforming.

Used for vulcanization special shapes and thermopress. It is noteworthy that this type of mold is much cheaper than the analogues used in injection molding machines. This significantly affects the cost of production.

At the same time, the vulcanization process takes quite a long time, which also affects the price of the finished product. But durable rubber or silicone products can only be made in this way.

Thus, intersection seals on radiators various kinds ensure their durability and efficient operation. In the process of selecting a gasket, it is necessary to take into account its type and scope.

Gaskets have long ceased to be a shortage: the necessary products can be found in any plumbing store.

The products we are interested in are used in two ways:

Intersectional radiator gasket ensures the tightness of the connection of sections. It is pulled together by a nipple - a short tube with opposite threads - and is clamped between the cut planes of the upper and lower collectors.
In addition, gaskets are used when installing radiator plugs on aluminum and bimetallic heaters.

However: in the latter case, they can be replaced by winding.
It can be used as sanitary flax impregnated with silicone or paint, FUM tape or polymer sealant thread.

Paronite gasket for cast iron sections.

Gaskets for bimetallic radiators and aluminum batteries can be made from both paronite and heat-resistant silicone.

Which of the two materials is more preferable?

It is difficult to give a definite answer.

Paronite, due to its rigidity, more effectively resists the internal pressure of the coolant;
Silicone, on the other hand, does not lose elasticity over time and requires less tightening force to securely seal the joint.

Pictured is silicone.

The paronite gasket for a cast iron radiator is always in the form of a flat ring.

Products designed for aluminum and bimetallic batteries can be in the form of both a flat ring and a toroid (donut).

The donut-shaped silicone gasket is installed only in radiators with an annular groove on the sections.

The diameter of the hole in the flat gasket is determined by the type of radiator and the diameter of the nipple. The nipple is supplied with a thread of the following sizes:

The material for us will be a conventional chamber for a pneumatic tire:

Automotive - for a cast-iron battery;
Bicycle - for aluminum / bimetallic.

For cutting, ordinary scissors are used; the contour is preliminarily transferred to a chamber cut lengthwise and laid out on a flat table with a ballpoint pen.

If you have an old camera and sharp scissors, you don't have to go to the store.

However: if you need to make a large number of gaskets, it makes sense to speed up the procedure for their manufacture by making a punch from a piece of a heating pipe of the appropriate size sharpened on one side (DN32 or DN25).

The list of typical problems with radiator gaskets is short:

When installed under a cork, paronite or silicone can be extruded one-sidedly. This happens especially often in cases where the axis of the thread of the plug or section has deviations from the perpendicular to the plane of the end face of the collector.
Paronite during long-term operation in conditions of strong heating somewhat loses its elasticity. As a result, after several tens of heating-cooling cycles of the sections, the intersectional gaskets can leak when the batteries cool down again: lowering the temperature leads to a slight change in the linear dimensions of the sections.

Leak of a cast-iron battery between sections.

How to install a gasket under the radiator cap of an aluminum battery with your own hands?

Lubricate the end face of the section manifold and the flat of the plug with any neutral grease. Silicone plumbing grease, grease and even liquid soap will do.
Slide the gasket onto the threads of the plug.
Tighten the plug with an open end wrench or adjustable wrench. Paronite shrinks until the force becomes noticeable (but by no means insurmountable: you risk stripping the pipe threads in the section manifold). Silicone is pulled together until the edges are visible from under the cork.

Instructions for eliminating intersectional leaks are somewhat more complicated.

The diagram will make it clear how the sections are connected.

Shut off the heating riser and unscrew the plugs or open the vents. If there are valves on the connections to the battery, just close them.
Substituting a basin or other container with low walls under the bottom blind radiator plug, unscrew the plug a few turns and let the remaining water drain. Unscrew the plug completely; if necessary, use a stick or any other handy tool to free the lower manifold from dirt.

Attention: on blind plugs, in most cases, the left-hand thread; they unscrew clockwise.

Repeat the operation with the top plug.
Mark on the radiator key the distance from the edge of the battery to the nipple you need.
Insert the key into any of the manifolds and, turning, insert it into the radiator until it engages with the desired nipple.
Loosen one turn. The direction of rotation is the same as that of the cork.
Repeat the operation with the nipple on the second manifold.
Unscrew the nipples, making one turn at a time in turn. Misalignment with uneven unscrewing will jam or tear the nipple.
Remove the end sections; put new gaskets on the nipples and thread the nipples on one thread.
Install the end sections, press them to the nipples and wrap the latter with a wrench until they are securely engaged.
Assemble the heater in the reverse order.

Bulkhead of a cast-iron battery.