DE102013019085A1 - Method for producing two-component products in spray box, involves vibrating spray box so as to bring metal beads into motion such that base components are mixed, and two-component product is produced - Google Patents

Abstract

The method involves bringing a component or base auxiliary components (10) e.g. paint and curing agent, and a compressed gas (11) into a spray box (1) under pressure. Base component (20) of products and liquefied gas (21) are brought into another spray box (12) under pressure. The base components are mixed together, where the spray boxes are closed by a pressing element (25). One of the spray boxes is vibrated so as to bring metal beads (35) into a motion such that the base components are precisely mixed and a desired two-component product is produced. An independent claim is also included for an apparatus for producing products.

Description

The subject of the invention is the process for the production of the products, in particular two-component products in the spray and devices for the use of this process, which both in the production of paint, paint, top coat, polyurethane foam, glue and deodorant and other similar products by means of the mixing method of at least two basic components is used.

Well-known two-component paints, for example, acrylic paints, are packaged in two separate cans, with the first component being in the form of this paint and the other being the acrylic hardener. Before the varnish is used, precise mixing of the two components is provided by means of a special cup made of a transparent plastic, with a scale which allows accurate preparation of the mixture according to a ratio corresponding to the cured product.

The patent Polish patent no. PL 199919 known system for mixing the liquid components has a closed container to which the medium is supplied through the line from the container via the dispenser and return and filling valve, from the closed container, however, the medium is passed through the return and emptying valve through the line to the finished product container , this closed container is connected by means of lines through three-way and three-position distribution valve with compressor.

From the patent specification of the Polish invention no. P-392941 Also, the method and kit for finishing varnish used to prepare a small portion of varnish, consisting of mixing 60-70 parts by volume of varnish with 30-40 parts by volume of hardener, and placing the thus prepared mixture in a container is introduced with the inert gas at 4 hPa inlet pressure. The set for use of this method in turn comprises a piston with the piston rod, slidably mounted in the guide of the lid of the paint container having in its lower part a cylinder for displacement of the piston and a seat for valve attachment of the shut-off valve of the gas container, wherein the paint container in the the top plate of the housing of this set is permanently seated.

In addition, that of the Polish patent no. PL 199824 known pressure vessel for mixing and dosing of the two-component materials, including two-component paints from a cylindrical housing together, which is completed at the top with a dome with the everted edge, which connects the dome with the housing and at the same time seals the two parts. The dome of this container is formed of a round metal plate, which has a visibly curved shape by appropriate shaping and the inner edge of this dome is everted and contains a valve plate with valve. The container bottom in turn is also connected by the everted edge to the housing and has amidst a bottom plate, above which there is a cartridge with the breakable lid, inside the cartridge sits a needle whose end is derived from the pressure vessel below by a sealing element , On both sides of the sealing element, the needle has restriction parts which prevent the sealing element and restrict the path of free displacement of the needle in the region of the inner container comprising this needle. To break the lid from the inner container, the needle is pressed by striking the container bottom against a hard surface, as a result, the high movement and the elastic rubber seal takes over this high movement and after breaking the lid, it sets the needle in its original position. The substances contained in the outer pressure vessel of the main component are liquid and sat down, for example, from curable binder for paints and liquid fuel for metering this component together and the other component is in a relatively small amount in the cartridge and usually it is a curing agent that quickly with the main component responds. The second component ie curing agent is introduced into the pressure vessel immediately prior to paint dosing by tearing off the lid of the cartridge and shaking it so that the two components mix.

The object of the invention is the elaboration of a simple and inexpensive process for the production of, in particular, two-component paints and inks, which are used in industrial production as well as in the individual users of these products. The object of the invention is also the machining of a construction element with simple construction, which allows the production of liquid products with two or more components by pumping, what the direct, fast and accurate mixing of at least two basic components z. B. of paint d. H. Lacquer and hardener allowed.

The essence of the process for the production of the products, in particular spray two-component products in the spray can is that in a spray can a component or base components and pressurized gas under pressure, the vapor pressure of the liquefied gas exceeding 7 bar exceeding, are brought, and in the other Spray can the basic basic component of this product with two or more components and the liquefied gas under pressure amounting to 3.5 bar-4.5 bar its vapors, then the two spring return valves, which are applied in the cylindrical parts of the profile plate of these cans, including these parts in the two-stage seats set using the radial hole of the corresponding Press parts are connected, and after placing the lower spray can on a stable surface and 180 ° rotation of the upper spray can on its bottom comes to pressure, which presses the helical and coil springs of these valves and causes their opening. As a result of this pressure, the base auxiliary component is pressed because of pressure difference in the required amount by the compressed gas from the upper spray into the lower spray can and at this time the two basic components are mixed together, then the two cans are shut off from the pressing part and the lower can shaken, so that the metal balls put in it are brought into the movement, so that the two basic components are completely and accurately mixed and the desired two-component product is formed. Advantageously, the compressed gas in the upper can has a pressure which exceeds the vapor pressure of the liquefied gas prevailing in the other can, which is determined as a function of the ratio used in the liquefied gas propane to butane. It is advantageous if the basic auxiliary component of the acrylic hardener and carbon dioxide as compressed gas, however, as the liquefied gas propane-butane is used or if as a basic auxiliary component of the hardener of the clearcoat and compressed gas nitrogen or air, however, as a basic base component Clear coat or paint and is used as a liquefied gas dimethyl ether. It is also advantageous if the total sum of the base auxiliary component and the basic basic component mixed together in the second spray can does not exceed 80% volume of this can and ratio between the basic base component and base auxiliary component contained in the second spray can are mixed together, advantageously 2: 1 to 5: 1. It is also advantageous if, prior to pumping the components contained in the first can, to the components contained in the second can, for the purpose of mixing the first can to the temperature which does not exceed 50 ° C, is heated.

Furthermore, set the devices for generating the two-component products in the spray according to the invention of two spray cans, which have the socket sales with the spring return valves mounted therein and from pressed part with body shape, on the outer surface a peripheral flange and the two opposite forehead two coaxial situierten seats, connected together by means of radial holes, with the dimensions and shape adapted to the jackets and spring return valves mounted therein. It is advantageous if the pressing part has identical two-stage seats, both ring floors are equipped with packing rings, the dimensions and shapes of these seats are adapted to the dimensions and shapes of the male type spring return valves mounted therein or if the pressed part over two identical Has ring seats and radially projecting bushings with the recesses on their foreheads and partly on their orbits, the dimensions and shapes of these seats being adapted to the dimensions and shapes of the female-type spring return valves mounted therein. It is also advantageous if the pressing member has two different seats, one having a ring shape and from a radially located socket part protrudes with the recess on his forehead and partially on its circumference, and second seat has a ring bottom with a seal, wherein the shape and the dimensions of the first seat are adapted to the shape and dimensions of the female-type spring return valve mounted therein, and the shape and dimensions of the second seat are adapted to the shape and dimensions of the male-type spring return valve mounted therein.

The introduction into two separate aerosol cans, tightly fitted with corresponding return valves of helical and coil springs, of two or more basic components, each in a different can, including the introduction of the liquified gas and compressed gas at significantly different pressures and connection of the valves These cans, by means of a special pressing member, which has the seats correspondingly adapted to the particular type of can valve, allowed fast and accurate pumping of the component from the first can with a higher gas pressure into the other can, accurate mixing and generation of the two-component product in the spray. The use of the user-friendly molded part with a simple and closed construction further enabled a maximum reduction in manufacturing costs and therefore a reduction in the production costs of the two-component products in the spray both by individuals and producers of this product type. This pressing part, which is placed on the valve of the can with the end-two-component product, can be used after the equipment of its opposite seat with the atomizing head as an atomizer of this two-component product.

Method according to the invention is illustrated by embodiments in more detail in the drawing, wherein 1 to 4 to the first embodiment according to the invention, 5 to 7 To the second embodiment of this method, and 8th to 10 Refer to the third embodiment of this method according to the invention, wherein the individual figures show the following represent: 1 Spray can with acrylic hardener and pressurized gas CO ₂ equipped with a male valve and connected by a male part with a male socket to the second can, which is also equipped with a male valve, but acrylic varnish and propane-butane liquefied gas contains state prepared for mixing these components in axial section, 2 - the same set of cans with their content with compressed springs of the opened male valves while pumping the hardener from one can into the other can containing lacquer, in axial section, 3 - pressing part, which pumps the components from one can into the other with two male seats in axial section, 4 - Can containing mixed lacquer and hardener together with, in addition, an atomising nozzle which atomises this chemically curable lacquer, for the application of the lacquers, 5 - Can with hardener of the clear coat and pressure nitrogen, which is equipped with a female valve, and is connected by a pressing part with two female seats with the second can, which is also equipped with a female valve, and clear and liquefied gas dimethyl ether (DME ) in the state prepared for mixing these components in axial section, 6 - the same set of cans with their content with pressed-down springs of the female valves during pumping of the hardener of the clearcoat from one can into the other can, which contains clear coat, in axial section, 7 Pressing part which pumps the components from one can into the other with two female seats in axial section, 8th - Can with hardener of the paint and compressed air, which is equipped with a female valve, and is connected by a female seat of the pressing part with a female and a male seat of this part in the prepared state for mixing these components, in axial section, 9 - The same set of cans with their content with pressed springs of the valves while pumping the hardener of the paint from one can into the other can, which contains paint, in axial section, 10 - Pressing part, which pumps the components from one can into the other can with a female seat and a male seat, in axial section.

example 1

Process for the production of the two-component product in the spray, for example a chemically curable varnish consisting of acrylic varnish as base component and its hardener, which are introduced in two separate doses, is based on the fact that the can ( 1 ), which at its upper edge with the dome ( 2 ) is sealed tight, airtight on the valve plate introduced therein ( 3 ), in whose cylindrical part ( 4 ) a male spring return valve ( 5 ) with the helical and helical spring ( 6 ) located at the bottom of the socket ( 7 ) of the valve riser ( 8th ) and with the jack control ( 9 ), is tightly attached, with the acrylic hardener ( 10 ) and the gas CO ₂ compressed under pressure of 7 bar ( 11 ), which is selected according to the amount of the pressed component and forms a gas cushion over this hardener is filled up. Furthermore, the second box ( 12 ), which is also at the top of the dome ( 13 ) tightly sealed, also airtight with the valve plate introduced therein ( 14 ), in its cylindrical part ( 15 ) a male spring return valve ( 16 ), with the analog helical and coil spring ( 17 ) located at the bottom of the socket ( 18 ) of the valve riser ( 8th ) and with the jack control ( 19 ), is attached, partially with the acrylic paint ( 20 ) and the liquefied gas propane-butane ( 21 ) is filled under the pressure of 3.5 bar, which depends on the ratio of the mixture propane to butane, the volume of these components is so much that after addition of the components ( 10 i 11 ) in the first can ( 1 ), their total sum is not 80% volume of the second can ( 12 ) and the ratio of the components in the second can ( 12 ) are included to the Komponneten in the first box ( 1 ) is 2: 1. Then the prepared second can ( 12 ) mixed on a stable surface, and of its male valve ( 16 ), the atomizer nozzle ( 22 ) (if applied), after which it is placed on its cylindrical part ( 15 ) of its valve disk ( 14 ) of the outstanding socket control element ( 19 ) a lower part ( 23 ) of the two-stage male seat ( 24 ), which in the pressed part ( 25 ) is carried out by placing its forehead against the packing ring ( 26 ), on the ring bottom ( 27 ) of the upper part ( 28 ) of this seat is, is pressed. In the upper part ( 29 ) of the two-stage male seat ( 30 ) of this part is again a cylindrical part ( 4 ) of the valve disk ( 3 ) of the male spring return valve ( 5 ) and the outstanding socket control element ( 9 ) of this valve, the 180 ° of the first can ( 1 ) is mounted, with the forehead of this part to the packing ring ( 31 ), which is also on the ring bottom ( 32 ) of the lower part ( 33 ) of the male seat ( 30 ), of the pressed part ( 25 ), as a result, the so connected set of the two cans ( 1 and 12 ) prepared with this part for the production of the curable two-component varnish, which is shown in the drawings 1 and 3 is shown. By the pressure of 180 ° turned over bottom of the can ( 1 ) of this sentence, the two helical and coil springs ( 6 and 17 ) pressed so that the packing rings ( 67 ) in the lower canals ( 69 ) with holes ( 70 ) of the controls ( 9 and 19 ) until the resistance with the stop ( 71 ) of the pressed part ( 25 ) through both rolled-up plate ends ( 13 and 14 ) and the male valves ( 5 and 16 ) of these two cans opened. The then in the can ( 1 ) prevailing higher pressure of Gas medium ( 11 ), which is 7 bar and the occurring pressure difference in the two cans (bottom can 3.5 bar) cause the flow and pumping of the acrylic hardener ( 10 ) through the holes ( 70 ) of the jack controls ( 9 and 19 ) and through the axial hole ( 34 ) of the pressed part ( 25 ) into the second can ( 12 ) and its mixing with the acrylic varnish ( 20 ) and the additional shaking of the second can causes the movement of the two metal balls ( 35 ), which are in the can, resulting in complete and accurate mixing of the two components, whereby the two cans are separated from their part and after putting on the male valve ( 16 ) of the second can ( 12 ) of the atomizer nozzle ( 22 ) contained therein, mixed two-component paint "L" is ready for use by spray method.

Example 2

In the second embodiment of the method according to the invention, the first can ( 1 ), with the dome ( 2 ) tightly closed, with the plate, with the female spring return valve ( 36 ) is supplied with the hardener of the clearcoat ( 37 ) and the pressurized nitrogen ( 38 ) is filled under the pressure of 8 bar, whereas the second can ( 12 ), with the dome ( 13 ) tightly closed, also with the female spring return valve ( 39 ), with the clearcoat ( 40 ) and the liquefied gas dimethyl ether DME ( 41 ) filled under the pressure of 4.5 bar, the ratio of the components in the second can ( 12 ), to the components contained in the first can ( 1 ) is like 5: 1 and the total sum of all the components in the second can ( 12 ) does not exceed 80% volume of the can. The other activities when pumping the hardener ( 37 ) using the pressurized nitrogen ( 38 ) from the first can ( 1 ) into the second can ( 12 ) using the pressed part ( 42 ), the two opposite two-stage female seats ( 43 i 44 ), which by means of the axial hole ( 45 ) are carried out analogously as shown above in the first example, as a result, the mixed two-component lacquer "LB" in the spray can ( 12 ) arises, which in the drawings 5 . 6 and 7 is shown.

Example 3

In the third embodiment of the method according to the invention, the first can ( 1 ), with the dome ( 2 ) tightly closed, with the plate, with the female spring return valve ( 46 ), is supplied with the hardener ( 47 ) and compressed air ( 48 ) is filled under the pressure of 8.5 bar, whereas the second can ( 12 ), also with the dome ( 13 ) tightly closed, with the plate, which also with the spring return valve but male type ( 49 ), with the paint ( 50 ) and the liquefied gas propane-butane ( 51 ) filled under the pressure of 4 bar, the ratio of the components in the second can ( 12 ), to the components contained in the first can ( 1 ) is as 4: 1 and the total sum of all the components in the second can ( 12 ) does not exceed 80% volume of the can. The other activities when pumping the hardener ( 47 ) using compressed air ( 48 ) from the first can ( 1 ) into the second can ( 12 ) using the pressed part ( 52 ) holding the two-tiered female seat ( 53 ) with the female spring return valve ( 46 ) and the male seat ( 54 ) with the male spring return valve ( 49 ), which by means of the axial hole ( 55 ), are carried out analogously as shown above in the first example, as a result, the mixed two-component coating (LU) in the spray can ( 12 ) arises.

In the further examples of the embodiment of a multicomponent product, the basic auxiliary component ( 10 ) and the compressed gas ( 11 ) used two, three and four different components, and as basic components ( 20 ) and liquefied gases ( 21 ) some different components, wherein the mixing is carried out analogously to Examples 1-3 and the desired multicomponent product is formed in the spray.

In the other examples of the embodiment of the invention, prior to starting the mixing of the component set, which is in the can ( 1 ), with the components in the can ( 12 ), the can ( 1 ) is heated with its content to the temperature of 30 ° C or 40 ° C or 50 ° C, so that the expected increase in the gas pressure contained in the can is achieved.

Example 4

The pressed part ( 25 ), like in the drawing 3 pictured, which is used to connect the cans ( 1 and 12 ) with the male spring return valves ( 6 and 16 ), like in the drawing 1 and 2 imaged, which contain various components inside which can be mixed by means of the pumping in of the first can ( 1 ) contained components to those in the second box ( 12 ) are used, is a rolling body with a peripheral annular board ( 71 ), which provides a stop function for the rolled-up forehead of the plates ( 13 and 14 ), and with two-stage male seats ( 24 and 30 ) on both foreheads ( 56 and 57 ) which are coaxial with each other and with an axial hole ( 34 ) are connected. Each of the seats ( 24 and 30 ) has external seats ( 23 and 29 ) with a larger diameter and related internal seats ( 28 and 33 ) with a smaller diameter, packing rings (on their cylindrical bottoms) ( 26 and 31 ) and the dimensions of these seats to the corresponding dimensions of the male spring return valves ( 5 i 16 ) in the cans ( 1 and 12 ) are adjusted.

Example 5

The pressing part ( 42 ), like in the drawing 7 pictured, which is used to connect the cans ( 1 and 12 ) with the female spring return valves ( 36 and 39 ), forms a rolling body with a peripheral external annular board ( 71 ), which provides a stop function for the rolled-up forehead of the plates ( 13 and 14 ), and at its two opposite foreheads ( 56 and 57 ) via coaxially located ring seats ( 43 and 44 ), of which over the foreheads of the body the bush parts ( 58 and 59 protrude), with a common through hole ( 45 ), these parts being attached to the outer protruding forehead ( 60 and 61 ) elongate recesses on their peripheries ( 62 and 63 ), so that their internal foreheads ( 64 and 65 ) under the surfaces ( 56 and 57 ) of this pressed part.

Example 6

Furthermore, the pressed part ( 52 ), like in the drawing 10 pictured, which is used to connect the cans ( 1 and 12 ), one of which with the female spring return valve ( 46 ) and the other with the male spring return valve ( 49 ), a rolling body with a peripheral external annular board ( 71 ) a stop function for the rolled-up forehead of the plate ( 13 i 14 ), and at its two opposite foreheads ( 56 and 57 ) has coaxially located seats of different shape, one of which is adapted to seat the female valve ( 46 ) the can ( 1 ) and second to the fitting of the male valve ( 49 ) the can ( 12 ), the shape of the two in the drawings 3 and 10 is shown.

The devices for producing the two-component products in the spray consist of two spray cans ( 1 and 12 ) and from a tightly connected pressing part ( 25 ), and each box has a rolled-up top border with the domes ( 2 and 13 ) is tightly connected, the rolled-up upper edges also with the profile plates ( 3 and 14 ) are tightly connected, in the middle part of the socket heels ( 4 and 15 ) with the internal annular bends ( 66 ) on which the packing rings ( 67 ) are displaceable with their internal foreheads in the corresponding channels ( 68 ) or ( 69 ) with through holes ( 70 ) of the jack controls ( 9 and 19 ) of the male spring return valves ( 5 and 16 ) which are located in the area of the socket heels ( 4 and 15 ) the dish ( 3 and 13 ), wherein the pressed part ( 25 ) between the two facing ends of the profiled plates ( 3 and 14 ) is placed. The devices according to the invention contain three possible versions, one of which is for use in both cans ( 1 and 12 ) of the same type of male spring valves ( 5 and 16 ), or the same type of female spring valves ( 36 and 39 ), or the male spring valve ( 46 ) and the female valve ( 49 ) to which the pressed parts ( 25 . 42 and 52 ), the nature of the solutions being described in Embodiments 4-6.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• PL 199919 [0003]
• PL 392941 [0004]
• PL 199824 [0005]

Claims (11)

The process for producing the products, in particular spray two-component products in the spray can, based on the mixing of the base components, using the spray can, which is closed at its upper edge with the dome with the everted edge which connects them tightly together their other end to profiled plate, which has the valve in itself, is airtight, characterized in that in a spray can ( 1 ) a component or base auxiliary components ( 10 ) and compressed gas ( 11 ) under the pressure which exceeds the vapor pressure of the liquefied gas exceeding 7 bar, and into the other spray can ( 12 ) the basic basic component ( 20 ) of this product with two or more components and the liquefied gas ( 21 ) be brought under pressure of its vapors amounting to 3.5 bar-4.5 bar, then the two spring return valves ( 5 and 16 ) or ( 36 and 39 ) or ( 46 and 49 ), which in the cylindrical parts ( 4 and 15 ) of the profile plate of these cans together with these parts in the two-stage seats ( 24 and 30 ) or ( 52 and 53 ) or ( 43 and 44 ), with the aid of the radial hole ( 27 ) or ( 34 ) or ( 45 ) or ( 55 ) of the pressed part ( 25 ) or ( 42 ) or ( 52 ) and after the aerosol can ( 12 ) on a stable surface and 180 ° rotation of the spray can ( 1 ) comes to pressure on its bottom, the helical and coil springs ( 6 and 17 ) causes these spring return valves and their opening, as a result, the basic auxiliary component ( 10 ) due to pressure difference in the required amount by the compressed gas ( 11 ) from the spray can ( 1 ) into the spray can ( 12 ) and at this time the two basic components ( 10 and 20 ) are mixed together, then the two cans from the pressed part ( 25 ) or ( 42 ) or ( 52 ), and the can ( 12 ) is shaken so that the metal beads ( 35 ) are brought into motion, so that the two basic components are mixed exactly and the desired two-component product is formed. A method according to claim 1, characterized in that the compressed gas ( 11 ) has a pressure which is the vapor pressure of the liquefied gas ( 21 ), which is determined as a function of the ratio used in the liquefied gas propane to butane. A method according to claim 1, characterized in that advantageously as a basic auxiliary component ( 10 ) of the acrylic hardener and as compressed gas ( 11 ) Carbon dioxide, on the other hand, as a basic basic component ( 20 ) Acrylic paint and as liquefied gas propane-butane is used. A method according to claim 1, characterized in that advantageously as a basic auxiliary component ( 10 ) the hardener of the clearcoat ( 10 ) and as pressurized gas nitrogen or air, as a basic basic component ( 20 ) Clearcoat or paint and as liquefied gas ( 21 ) Dimethyl ether is used. Method according to claim 1, characterized in that the total sum of the basic auxiliary component ( 10 ) and the basic basic component ( 20 ) in the second spray can ( 12 ) are mixed together, 80% volume of this can does not exceed. Method according to claim 1 or 4, characterized in that the ratio of the basic basic component ( 20 ) to the basic helper component ( 10 ) in the second spray can ( 12 ) are mixed together, advantageously 2: 1, to 5: 1. A method according to claim 1, characterized in that prior to pumping the components in the can ( 1 ), to the components contained in the can ( 12 ), for the purpose of mixing, the can ( 1 ) is advantageously heated to the temperature not exceeding 50 ° C. The devices for producing the two-component products in the spray, which include the spray cans with the rolled-up upper edges, which are tightly connected to the domes whose upper rolled edges are tightly connected to the profile plates, in the middle of the axially located socket heels with the valves mounted therein characterized in that they consist of two spray cans ( 1 and 12 ), which the socket paragraphs ( 4 and 15 ) with the therein spring return valves ( 5 and 16 ) or ( 36 and 39 ) or ( 46 and 49 ) and from the pressed part ( 25 ) or ( 42 ) or ( 52 ), which has a body shape, which on the outer surface a peripheral flange ( 71 ) and on the two opposing foreheads ( 56 and 57 ) coaxially located seats ( 24 and 30 ) or ( 43 and 44 ) or ( 53 and 54 ) with the help of the radial holes ( 34 ) or ( 45 ) or ( 55 ) connected together, with the dimensions and shape to the socket heels ( 4 and 15 ) and these spring return valves adapted. Apparatus according to claim 6, characterized in that the pressed part ( 25 ) identical two-stage seats ( 24 and 30 ), whose two ring floors ( 27 ) with packing rings ( 26 and 31 ), the dimensions and shapes of these seats being based on the dimensions and shapes of the spring return valves ( 5 and 16 ) of the male type. Apparatus according to claim 6, characterized in that the pressed part ( 42 ) over two identical ring seats ( 43 and 44 ) and therefrom outstanding, radially situated bush parts ( 58 and 59 ) with the recesses ( 62 and 63 ) on their foreheads and partially on their perimeters, the dimensions and shapes of these seats being based on the dimensions and shapes of female-type spring return valves ( 46 and 49 ) are adjusted. Apparatus according to claim 6, characterized in that the pressed part ( 52 ) over two different seats ( 53 and 54 ), the seat ( 53 ) has a ring shape and from a radially located socket part ( 58 ) with the recess ( 62 ) on its forehead and partly on its periphery, and two-stage seat ( 54 ) a ring bottom ( 27 ) with a seal ( 26 ), the shape and dimensions of the seat ( 53 ) to the shape and dimensions of the therein spring return valve ( 46 ) of the female type and the shape and dimensions of the seat ( 54 ) to the shape and dimensions of the therein spring return valve ( 16 ) of the male type.

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