EP1243887B1 - Sealing system for radiator - Google Patents

Abstract

Sealing system for a heating body (1) formed from several base elements (2) comprises at least one sealing body (6), a pressure element, and a sealing pin. The sealing body is a sealing ring with a defined through opening (7). The sealing pin has a front surface. The pressure element has at least one flat region with a larger diameter than that of the sealing pin and is arranged between the sealing ring and the sealing pin. The sealing pin is inserted in an opening lying opposite the flow opening (4a) to be sealed. An axial force exerted on the sealing pin in the direction of the flow opening to be sealed presses the front surface of the sealing pin on the pressure element whose flat region is pressed on the sealing ring to seal the edges of the through opening and the flow opening. An Independent claim is also included for a heating body comprising the above sealing system.

Description

The invention relates to a sealing system for one of several basic elements formed radiator, in which the individual basic elements under training of overflow openings are connected to one another in a medium-tight manner, the Openings in the overflow areas between at least one end member and an adjacent link can be sealed with a sealing element, which in the overflow opening is inserted and sealing against the overflow opening surrounding edge is pressed.

Such a sealing system is known in the prior art. With such a Sealing system, it is possible to reduce the basic elements of a radiator to seal technical effort against each other. For example the overflow openings between the one provided with the heating medium flow Basic element and the adjacent basic element in the foot area with a pressed disc completely closed and in the overflow area of the Provide head area with a pressed sealing ring, the heating medium flow is regulated via a valve. Such a sealing system is used, for example, in the EP 0 735 338 B1.

The advantage of such a sealing system is that it is adequate Sealing is achieved in that the sealing elements ring and disc elastic material and be formed by simply pressing the Sealing element to the edge of the respective overflow opening a sufficient The overflow openings are sealed. This will be advantageous Welding processes for sealing adjacent basic elements are superfluous.

A disadvantage of the known sealing system is that it is not standard Sealing plugs and valves can be used because of a To achieve adequate sealing, modified elements are used have to. The overflow opening is sealed in the present case Sealing system in that a sealing body with pressure from one side to the Overflow opening surrounding edge is pressed. Due to the fact that the sealing body is preferably formed from a permanently elastic material, a medium-tight seal of the overflow opening is achieved. Since the Sealing body is formed at least in the head area as a sealing ring To allow the heating medium to flow into the adjacent basic element, it is also necessary to additionally seal the sealing ring opening in order to to ensure unidirectional flow of the heating medium.

In EP 0 735 338 B1, the sealing of the overflow opening and the Sealing ring opening achieved through the use of a valve housing. This specifically shaped component enables with its conical surface and its annular transition surface, both the centering of the sealing ring and a reliable sealing of the sealing ring opening. Through the valve housing Sealing ring pressed against the edge of the overflow opening, causing this is sealed. However, such a part must be specially made and cannot be combined with existing components. This requires one Disadvantage in the assembly and in the production and storage of the parts.

Furthermore, the area over which the pressure is transmitted to the sealing body relatively low, with the result that a relatively strong pressure is exerted must to a seal in the edge areas of the overflow openings cause what causes heavy loads on the material in the Pressure transfer areas leads and fatigue of the material can result, since the pressure for pressing the sealing body only is exercised selectively and not over a large area. Besides that, maybe not permanent sealing there is also a risk that the sealing element due to yields due to the assembly pressure and by the overflow opening is pressed into the adjacent base element.

In the foot area of the conventional systems, a specially designed one Spacer can be used. Such custom-made products must be in addition to the standard elements such as the sealing plug or the like. are made and stored. In addition to the resulting additional Manufacturing and storage costs for these parts is the installation in the respective Radiators associated with increased production costs, since each requires additional part of modified work steps, whereby the Assembly of the sealing system is expensive and difficult to carry out.

The invention is therefore based on the object of providing an inexpensive, effective sealing system which is simple to assemble and in which the use of custom-made products can be dispensed with. At the same time, a radiator is to be provided, the basic elements of which can be easily and inexpensively sealed against one another during assembly.

The inventive object is achieved in that the sealing system has at least one sealing body, a pressure element and a sealing pin, whereby the sealing body is designed as a sealing ring with a defined through-opening, the sealing pin has an end face, the pressure element at least one flat zone with respect to the end face of the sealing pin has an enlarged diameter, the pressure element being arranged between the sealing ring and the sealing pin, the sealing pin being introduced through an opening opposite the sealing overflow opening, an axial force being applied to the sealing pin in the direction of the sealing overflow opening, as a result of which the end face of the sealing pin is pressed against the pressure element and this is pressed with its flat area onto the sealing ring, the edges of the through opening and the overflow opening being sealed off in a medium-tight manner be sealed.

The present invention advantageously makes custom-made products superfluous. The sealing system according to the invention can both in the head area can also be used in the foot area of the overflow openings to ensure effective To achieve sealing of the respective overflow openings. The sealing system points at least one sealing body and a sealing pin. Here is the sealing body designed as a sealing ring with a defined through opening. Next to the Sealing body, the sealing system according to the invention also has at least one Sealing pin with an end face and a pressure element. The pressure element has at least one flat area opposite the end face of the Sealing pin enlarged diameter. The pressure element is between Sealing ring and sealing pin arranged in such a way that the pressure element with its flat area rests on the sealing ring.

The sealing pin is through one of the overflow opening to be sealed opposite opening introduced. This can be done, for example, by Screwing the sealing pin into a threaded element of a terminal Basic element. The sealing pin can be interposed Gasket to be introduced medium-tight. When inserting the sealing pin an axial force is exerted on the sealing pin in the direction of the seal Overflow opening applied; this can be done, for example, by screwing the Sealing pin into the threaded element. Through the applied force the end face of the sealing pin is pressed against the pressure element, which thereby pressed with its flat area against the sealing body, whereby the sealing body is pressed flat against the edge of the overflow opening. there the passage opening and the overflow opening become medium-tight sealed.

Since the sealing body is formed from a permanently elastic material, one takes place Sealing of the overflow openings as a result of the installation pressure, whereby the permanently elastic sealing body pressed to the edge of the overflow opening becomes. Depending on the type and used material of pressure element and sealing pin additionally a seal arranged between the end face of the sealing pin and the pressure element to ensure a medium-tight seal.

The sealing system according to the invention has several advantages. The fact that a Sealing body in combination with a pressure element with a flat area with a larger diameter than the end face of the sealing pin is used, a defined print run and Pressure transfer surface provided for the seal. To the pressure element the end face of the sealing pin is pressed, whereupon the pressure element with its flat area is pressed against the sealing body, whereby this is pressed medium-tight to the edge of the overflow opening. Because of the engagement of a pressure element with at least one flat area are in advantageously overcome several disadvantages. The pressure element causes in Area of the passage opening of the sealing ring due to its stiffened Properties and its areal extension a better distribution of the applied assembly pressure on the sealing ring and thus leads to a more effective sealing of the overflow opening. This eliminates the pressure selectively over the pressure attachment surface of the sealing pin on the sealing ring transferred, but experiences through the pressure element with at least one area, a larger area distribution, so that the force is also directly on the edge areas of the sealing body acts because the sealing body due to flat pressure transmission surface can be bent less. Thereby the elastic sealing body is widespread against the edge of the Overflow opening pressed and seals on the edge areas of the Overflow opening more effectively. Through the stiffened area is also a Penetration of the pressure attachment surface of the sealing pin in the preferably elastic sealing ring and thus possible damage to the sealing ring prevented. This reduces the possible signs of fatigue in the material, which is essentially selective due to the conventional system Experienced stress, counteracted. Furthermore, the pressure element prevents the Sealing body due to its elastic nature due to the Bending pressure too strong and slips through the overflow opening.

The sealing system according to the invention makes special designs for the plug or the valve is unnecessary and it can therefore in advantageously on special custom-made products such as Valve housing, spacers or similar can be dispensed with, as with standard Components a medium-tight seal is achieved. With the The system according to the invention can be equipped with standard sealing plugs and valves be used, which means the additional production of special parts as well their storage is eliminated. Therefore, the use of the invention Sealing system extremely economical. The for the sealing system according to the invention necessary items are mass-produced items that are cheap to manufacture and simple are in use. This allows work steps during assembly can be saved and also the sealing system according to the invention is little susceptible to faults, resulting in fewer errors during assembly and maintenance occur. Furthermore, the better edge pressure due to the Pressure element a medium-tight seal of the overflow opening with less Pressure enables, which also causes fatigue of the sealing body material counteracts.

According to an advantageous development, the sealing pin has a pin-like one End area with a defined diameter, with the end face of the Sealing pin compared to the pin-like end portion an enlarged Has cross-section. The pin-like end region can pass through the through opening of the sealing ring. This advantageously results in a Centering the sealing pin.

According to an advantageous development, the pressure element is flat Disc element which is put over the pin-like end region. The Disc element advantageously has an opening, the opening of the disc element is smaller than the end face of the sealing pin. Thereby is made possible in an advantageous manner that the disc element by the End face of the sealing pin is pressed flat against the sealing ring. This will the assembly pressure is effectively and effectively transferred to the sealing body there is a more effective edge pressure.

According to an advantageous proposal, the sealing pin is a screw element, which over its front face lying in front of the pin-like end area over the Pressure element as a flat pressure attachment surface to the sealing ring Overflow opening surrounding edge presses. This is advantageous Easy installation of the sealing system enables, because the sealing pin can easily be screwed into a threaded element, which the Manufacture and maintenance of the sealing system greatly simplified and thus makes inexpensive. Standard screw and Screw-in elements can be used.

So it is proposed according to an advantageous development that the Sealing pin is screwed into a plug. Furthermore, the Sealing pin can be a valve that enables the flow of heating medium in the Regulate overflow area through the through opening. If one complete sealing between two basic elements can take place on the use of a valve can be dispensed with and it can for example be a simple screw plugs can be used to close the overflow opening in the Completely seal the foot area. The sealing body can also be a closed sealing washer.

It is also proposed according to an advantageous development that the Sealing ring has a through opening, which is essentially the Corresponds to the outer diameter of the pin-like end region of the sealing pin, which is passed through the through opening. This will be more advantageous Way the dimensions of the through opening to be carried out Areas of the sealing pin matched what the medium-tight seal favored.

According to an advantageous development, the disk element is a Metal disc. This can be round or square, for example, and between the Sealing ring and the end face of the sealing pin can be arranged. It can these can be, for example, a perforated disc through which the pin-like End region of the sealing pin is guided. Due to the assembly pressure Disk pressed against the sealing body through the end face of the sealing pin, which also makes the power transmission more extensive and more effective because the disc has a good edge pressure. The use of a disc is inexpensive. In addition to metal discs, plastic ones can also be used be used.

According to an advantageous development, it is proposed that the Pressure attachment surface of the sealing pin and the pressure element a sealing element to arrange. The sealing element can be an O-ring, for example, which is arranged between the end face and the pressure element. For that can for example, a groove can be provided in which the O-ring is inserted. This seals it on the pressure attachment surface of the sealing pin. By this embodiment is a medium-tight seal in a simple manner possible. The sealing ring opening is effectively sealed because the backflow of the Medium through the arranged between the sealing pin and pressure element Sealing element is prevented. The use of a disc as a pressure element is also advantageous in that a defined system for the sealing O-ring provided. This advantageously seals in favored this area.

It is also conceivable that the sealing element is not a separate element, but as a functional area of the sealing pin and / or the pressure element is trained. Here, the pressure element and / or the end face with a Coating of essentially elastic material may be provided so that no additional separate sealing element is necessary. Both are Embodiments made of plastic or metal are conceivable.

According to an advantageous development, the sealing system according to the invention has at least one extension element. This is at least on the sealing pin locatable. The use of extension elements is advantageous Way enables a complete radiator from any radiator block with integrated thermostatic valve. The extension elements allow the connections for flow and return and positioning of the thermostat to choose flexibly. This advantageously turns on simple way of flexible adaptation to the different circumstances allows. The extension elements can be made, for example Be plastic and / or metal. For example, you can use the sealing pin be soldered and / or screwed, pressed, glued or shrunk become.

According to an advantageous development, the overall diameter of the Disc element only slightly smaller than that of the overflow opening. Thereby On the one hand, simple assembly is made possible because the pressure element is simple can be pushed through the overflow opening and also a good one Power transmission via the stiffened area to the area to be sealed Edge areas of the overflow opening causes and the overflow opening is so effectively sealed because of the flat area of the pressure element strong bending of the sealing body is counteracted.

When installing the sealing system, the sealing body can be in the area of Overflow opening can be arranged. The overall diameter is preferred of the sealing body larger than that of the overflow opening. Due to the elastic Properties of the sealing body can be bent during assembly, so that it can be guided through the overflow opening in the bent state. According to an advantageous development of the sealing system according to the invention the sealing body has at least one undercut on at least one side Holding lip on. The sealing body can in this way at the overflow opening be arranged that the retaining lip at least partially by the Overflow opening protrudes into the adjacent base element and the edge of the Overflow opening in the undercut of the retaining lip. The sealing body can through simple pressing can be pressed into the overflow opening. The order at least one retaining lip on the sealing body has several advantages. To the One is the sealing body in position on the holding lip Overflow opening held. The edge of the overflow opening is in the Undercut between the sealing body and the retaining lip shoulder, what a Centering and locking the sealing body in the area to be sealed Overflow opening causes. As a result, no additional centering or Retaining means are used during assembly to get the sealing body into the correct one Bring position at the overflow opening. Furthermore, the retaining lip prevents the sealing body slips away from the overflow opening during assembly, which leads to As a result, it would get into the tubular areas of the base element could be from where it would have to be recovered. The holding lip leads to an extraordinary simplification of the assembly and to an optimal Seat of the sealing body in the overflow opening. The retaining lip can be used as circumferential edge may be formed or only in partial areas of the sealing body.

According to an advantageous development of the present invention Retaining lips arranged on both sides of the sealing body. In addition to the retaining lips, in whose undercut the edge of the overflow opening is arranged, the Sealing body on the opposite side have retaining lips, in the Undercut arranged at least the flat area of the pressure element can be. As a result, the pressure element is securely in position on the sealing body held. This version is particularly advantageous when using a Washer because the washer is fixed to the sealing ring by the retaining lip. This is not only easy to assemble, but especially repairs can be carried out without any problems since it prevents the removal of the Sealing pin slides out the pane and falls into the radiator sections.

The sealing pin, for example a valve, can be easily applied to one standard plugs are screwed in. The final one For this purpose, the basic element has a threaded ring, in which the standard Sealing plug can be screwed in. For the secure sealing of all Threaded areas can provide additional seals between the valve and Sealing plug and arranged between sealing plug and radiator become. These can be fiber or soft seals. This screwed The arrangement enables simple and inexpensive assembly of the Sealing system with standard elements. The threaded ring can both lying on the inside and on the outside of the radiator in the form of a flange his.

With the invention, a radiator is also provided, which a has sealing system according to the invention. This radiator is inexpensive producible, since standard components are used for the sealing can and the assembly is easy to use.

Figur 1

einen senkrecht geschnittenen Teilbereich eines Heizkörpers, wobei das Dichtsystem gemäß einer Ausführungsform im Ventilbereich gezeigt ist,

Figur 2

einen senkrecht geschnittenen Teilbereich eines Heizkörpers, wobei das Dichtsystem gemäß einer weiteren Ausführungsform im Ventilbereich gezeigt ist,

Figur 3

in einer senkrecht geschnittenen Ansicht das Dichtsystem gemäß einer weiteren Ausführungsvariante,

Figur 4

zeigt in einer senkrecht geschnittenen Ansicht einen Heizkörper mit erfindungsgemäßen Dichtsystem sowie einem Verlängerungselement gemäß einer Variante,

Figur 5-7

zeigen in senkrecht geschnittenen Ansichten jeweils weitere Heizkörper mit erfindungsgemäßen Dichtsystemen und unterschiedlich gestalteten und positionierten Verlängerungselementen,

Figur 8-11

zeigen in senkrecht geschnittenen Ansichten weitere Heizkörper mit erfindungsgemäßen Dichtsystemen mit unterschiedlich positionierten Vorlauf- und Rücklaufanschlüssen und Thermostatventilen.

Further advantages and features result from the description of the figures. This is only for explanation and is not restrictive. It shows:

Figure 1

a vertical section of a radiator, the sealing system according to one embodiment being shown in the valve area,

Figure 2

a vertical section of a radiator, the sealing system according to another embodiment being shown in the valve area,

Figure 3

in a vertically sectioned view the sealing system according to a further embodiment variant,

Figure 4

shows in a vertical sectional view a radiator with a sealing system according to the invention and an extension element according to a variant,

Figure 5-7

show, in vertically sectioned views, each further radiator with sealing systems according to the invention and differently designed and positioned extension elements,

Figure 8-11

show in vertical sectional views other radiators with sealing systems according to the invention with differently positioned flow and return connections and thermostatic valves.

Figure 1 shows a portion of a radiator 1, which consists of several Basic elements 2 exists. The basic element 2a is with the Provide heating medium flow. Each basic element has a hub-like head and Foot area 3, in which two opposite circular Overflow openings 4 are formed. In the overflow openings surrounding edge areas 5 are the basic elements with each other connected liquid-tight. This can be done, for example, by welding or Screwing. By connecting the basic elements remains in the Connection area one overflow opening each. This is not shown in the Base area of the base element 2a through the sealing system according to the invention closed, an inventive sealing body in the form of a closed disc or a sealing ring can be used, which is pressed against the edge surrounding the overflow opening. As a sealing pin can, for example, when using a sealing ring in the foot area closed screw plug can be used. This will overflow of the heating medium entering through the connecting piece for the flow into the Prevents foot area of the adjacent base element.

In the head region of the base element 2a there is a sealing body 6 in the region of the Overflow opening 4a arranged. This is designed as a sealing ring, one Has passage opening 7. The sealing body 6 has retaining lips 8. The Retaining lips protrude into the adjacent base element, the edge of the Overflow opening is in the undercut area 9 of the retaining lip 8. Thereby the sealing body 6 is held in position on the overflow opening 4a. The Sealing body is formed from a permanently elastic material 10, for example made of rubber or caoutchouc. The holding lips 8 bring about a better hold of the Sealing body 6.

A valve 11 is used as the sealing pin, the pin-like end region of the Valve is guided through the sealing ring opening 7, the heating medium flow through the sealing ring opening 7 is regulated by the valve 11. The valve 11 is in one Screwed plug 12, which in turn in a threaded ring 13th is screwed in. Between the threaded ring 13 and the plug 12, as well between valve 11 and sealing plug 12 are sealing devices 14 arranged. The threaded ring 13 does not have to be arranged inside as shown an outside flange is also possible. The valve 11 is in the Plug 12 screwed in. The valve has an end face in the form of the Valve paragraph 15, which serves as a pressure approach surface and over which the by screwing the valve axially in the direction of the overflow opening applied force is transmitted to the sealing body 6 via the disk 16, whereby this is pressed to the edge of the overflow opening. The disk 16 is arranged between valve shoulder 15 and sealing body 6 and increases the Pressure transmission surface, since a yielding of the permanently elastic material of the Sealing body in the support area of the disc is prevented. This will make one optimal edge pressure. To the area between the valve heel and To optimally seal the washer, there is an O-ring 17 between, valve shoulder 15 and Disk 16 arranged. The disc 16 is in accordance with the embodiment as Perforated disc, the opening diameter of the perforated disc in essentially the outer diameter of the pin-like end region of the valve corresponds, which is guided through the seal opening 7.

The pressure for liquid-tight pressing of the sealing body 6 to the edge of the Overflow opening is by screwing in the valve or Sealing plug produced. The diameter of the disk is advantageous 16 chosen so that it is essentially the inner diameter of the Overflow opening corresponds. This will effectively distribute the exerted pressure on the edge areas of the overflow opening to be sealed caused because the pressure through the disc 16 better distributed to the edge areas is so that the overflow opening can be sealed in a simple manner, because the elastic sealing body is in the contact area due to the installation pressure does not bend the disc, which would result in a less effective sealing. Furthermore, due to the construction according to the invention, the sealing ring opening 7 effectively sealed because the medium flows back through the Sealing body 6 and valve 11 arranged disc 16 and sealing element 17th is prevented. Through the use of the disc 16 according to the invention is further Fatigue of the sealing body material is prevented, as the pressure no longer selectively via the valve heel to what is preferably permanently elastic Material of the sealing body 6 is exercised, but is distributed over a large area.

Figure 2 shows the sealing system according to the invention according to another Embodiment. In contrast to Figure 1 are on both sides of the sealing body Holding lips 8 and 8a arranged. The somewhat smaller ones, in the first Retaining lips 8a lying on the basic element fix the disk 16 to the sealing body 6. During assembly, the sealing body 6, whose overall diameter is larger than the diameter of the overflow opening is bent so that it through the terminal opening can be introduced into the radiator and is at the positioned overflow opening to be sealed. The holding lips 8 fix the Sealing body 6 at the overflow opening. Subsequently, the disc 16, whose diameter is preferably slightly smaller than that of the overflow opening, introduced into the heating element and by means of the holding lips 8a on the sealing element 6 fixed. This ensures that the disc 16 is centered and in the correct position on the sealing body is permanently fixed. Since the sealing body 6 due to the retaining lips 8 and the disk 16 due to the retaining lips 8a in Can be held in position, the valve 11 in the Plug 12 are screwed in, the pin-like end portion of the Valve is simply passed through the sealing body opening 7, since the sealing body or the disc does not have to be held or centered additionally. this leads to an extraordinary simplification in assembly. In addition to relief during assembly, the sealing system according to the invention also leads to a extraordinary simplification in the event of necessary repairs, because both the sealing body 6 and the disc 16 are held firmly in position and do not slip unintentionally.

Figure 3 shows the sealing system according to the invention according to another Embodiment. In contrast to Figure 2 is a new Plug 12 used, which is through a sealing shoulder 18th distinguished. This is chamfered according to the embodiment. Between Sealing plug and valve can, for example, be a fiber or soft seal be interposed. The sealing shoulder 18 creates a planar sealing surface provided so that a defined system for the O-ring 19th is available. The sealing heel is in addition to the more effective sealing also advantageously prevents the valve from being driven too far and the sealing body is pressed through the overflow opening.

Figure 4 shows a radiator with a sealing system according to the invention and a Extension element 20, which is a flexible arrangement of thermostats and Flow and return connections (VL and RL) enabled. The Extension element 20 enables according to this embodiment Arrange heating flow in the fifth basic element, with the heating medium over the extension element 20, which can be a tube, for example, in the first basic element is guided. The overflow opening in the foot area sealed to the second base element, for example by welding the tube; but other sealing principles are also possible. The heating medium can now through the heating medium flow and the extension element 20 into the first Basic element, which acts as a riser, enter and via the valve 11 in the neighboring limbs flow.

Figures 5 to 8 show further variants using extension elements 20 both the connections for the heating flow and return, as well as for the Thermostat 21, flexible and almost arbitrary to choose and arrange. there the extension elements 20 with the sealing pins according to the invention 22 connected, for example by soldering, screwing, shrinking, gluing, Presses or the like. To control the heating medium flow, as required further sealing body 6 is used, through which the extension elements be carried out medium-tight, and / or blind washers 23 shrink wrapped. The flow of heating medium is symbolized by the arrows. The Sealing body 6 can, for example, in the end regions by means of a Screw plug 24 as a sealing pin on the edges of the overflow openings be pressed. The sealing body can be used as a ring or disc as required be trained. It is advantageous if the sealing body as a closed Washer is formed, provided a complete seal between two Basic elements should be done. The invention provides a sealing system for Provided, which effectively seals overflow openings allows. The advantageous configurations make it possible to make the connections freely selectable for flow and return and also the thermostats to be arranged as desired, so that this in the head or foot area of the radiator can be arranged.

FIGS. 9 to 11 show the use of the sealing system according to the invention in further variants, the thermostats 21 and the connections for Heating flow and return can be positioned differently. By the Use of sealing bodies 6 and blind washers 23 according to the invention can be screwed or welded is a control of the Heating medium flow possible. This allows the radiator to be flexible with thermostats and connections are provided.

LIST OF REFERENCE NUMBERS

1

radiator

2

basic elements

3

hub-like head area

4

overflow

5

Edge area of the overflow opening

6

sealing body

7

Through opening of the sealing ring

8th

retaining lip

8a

retaining lip

9

undercut area

10

permanently elastic material

11

Valve

12

plugs

13

threaded ring

14

sealing device

15

valve sales

16

disc

17

O-ring

18

sealing paragraph

19

O-ring

20

extension element

21

thermostat

22

sealing pin

23

blind disc

24

screw plug

VL

leader

RL

returns

Claims (18)

1. Sealing system for a radiator (1) with several basic elements (2,2a) capable of media-tight interconnection with the formation of by-pass openings (4, 4a), where a by-pass opening (4a) may be sealed between an end member (2a) and a neighbouring basic element (2) by means of a sealing element (6) provided with an aperture and inserted into the by-pass opening (4a) that is pressed against a rim (5) surrounding the by-pass opening (4a),
   characterised in that the sealing element (6) may be subjected to an axial pressure acting in the direction of the by-pass opening (4a) by means of a thrust element (16) disposed between one face (15) of a sealing pin (11) and the sealing element (6), where the sealing pin (11) may be inserted through an aperture (4) opposite to the by-pass opening (4a) to be sealed and the thrust element (16) has at least one surface with a diameter which is greater than that of the face (15) of the sealing pin (11).
2. Sealing system in accordance with Claim 1, characterised in that the sealing pin (11) has a pin-shaped end portion with a defined diameter, where the face (15) of the sealing pin (11) has a larger cross section than the pin-shaped end portion and where the pin-shaped end-portion extends through the aperture of the sealing element (6).
3. Sealing system in accordance with Claim 2, characterised in that the thrust element (16) has the form of a disc that is fitted over the pin-shaped end portion.
4. Sealing system in accordance with one or several of Claims 1 to 3, characterised in that the thrust element (16) has an aperture, where the diameter of the face (15) of the sealing pin (11) is greater than that of the aperture of the thrust element (16).
5. Sealing system in accordance with Claims 1 to 4, characterised in that the sealing pin (11) is a screw-threaded element which presses the sealing element (6) against the rim (5) surrounding the by-pass opening (4a) with its end face (15) disposed in front of its pin-shaped end portion through the thrust element (16) that acts as the pressure application face.
6. Sealing system in accordance with one or several of Claims 1 to 5, characterised in that the sealing pin (11) is screwed into a sealing plug (12).
7. Sealing system in accordance with one or several of Claims 1 to 6, characterised in that the sealing pin (11) is a valve.
8. Sealing system in accordance with one or several of Claims 1 to 7, characterised in that a sealing means (15) is disposed between the end face (15) of the sealing pin (11) and the thrust element (6).
9. Sealing system in accordance with Claim 8, characterised in that the sealing means (15) is an O-ring that seals against the pressure application face of the sealing pin (11).
10. Sealing system in accordance with one or several of Claims 1 to 9, characterised in that at least one extension element (20) may be disposed on the sealing pin (11).
11. Sealing system in accordance with one or several of claims 1 to 10, characterised in that the overall diameter of the thrust element (16) is smaller than that of the threaded ring (13).
12. Sealing system in accordance with one or several of Claims 1 to 11, characterised in that the sealing element (6) has at least one undercut retaining bead (8, 8a).
13. Sealing system in accordance with one or several of Claims 1 to 12, characterised in that at least one retaining bead (8) of the sealing element (6) projects partially through the by-pass opening (4a) into the neighbouring element (2) and that the rim of the by-pass opening (4a) is disposed in the undercut of the retaining bead (8).
14. Sealing system in accordance with one or several of Claims 1 to 13, characterised in that it has one retaining bead (8a) of the sealing element (6) on one side, where the thrust element (16) may be disposed in the undercut of retaining bead (8a).
15. Sealing system in accordance with one or several of claims 1 to 14, characterised in that the thrust element (16) and the sealing element (6) of the sealing system are formed into an integral part.
16. Sealing system in accordance with one or several of claims 1 to 15, characterised in that the thrust element (16) and the sealing pin (11, 22) of the sealing system are formed into an integral part.
17. Sealing system in accordance with claim 10, characterised in that the extension element (20) and the sealing pin (11, 22) of the sealing system are formed into an integral part.
18. Radiator (1) characterised by a sealing system in accordance with one or several of Claims 1 to 17.

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