Coalescing separator insert, coalescing separator, and process for manufacturing a coalescing separator insert

Abstract

Disclosed is a coalescing separator (200; 202) comprising a coalescing separator insert (100; 102) for purifying a gas stream which, in the operating position of the coalescing separator insert (100; 102), flows through the coalescing separator insert (100; 102) from the outside inwards or from the inside outwards, the coalescing separator insert (100; 102) comprising: - at least one first coalescing separator part (10) comprising a coalescing separator medium which is located around an air-permeable cylindrical first support tube (12) designed to support the first coalescing separator part (10); and - at least one additional coalescing separator part (20) comprising an additional coalescing separator medium(20) which (20) is positioned concentrically to the first coalescing separator part (10), e.g. is wound about an additional support tube (22) designed to support the additional coalescing separator part (20), wherein - the additional coalescing separator part (20) is at least partially wound in multiple layers and, in at least some areas, has at least two coalescing separator medium layers (24, 25) which overlap in the direction of flow of the gas stream, and - in order to attach the winding of the additional coalescent separator part (20), the overlapping coalescing separator medium layers (24, 25) are connected to one another in at least some areas.

Description

[0001] Coalescence separator insert, coalescence separator and method for producing a coalescence separator insert

[0002] Technical area

[0003] The invention relates to a coalescence separator insert, in particular an air deoiling element, according to the preamble of claim 1 and a coalescence separator according to the preamble of claim 10.

[0004] The invention further relates to a method for producing a coalescence separator insert according to the preamble of claim 13.

[0005] State of the art

[0006] Air deoiling elements are known, for example, from document EP 1 738 816 B1. The air to be cleaned flows from outside to inside or from inside to outside through the air deoiling element, where a multi-layer main separator operating according to the coalescence principle separates and coalesces oil droplets from the flowing air. The secondary aerosol exiting the main separator then flows through another coalescence separator body, a secondary separator, where the enlarged, coalesced droplets are separated and drained by gravity.

[0007] Heavy nonwovens, such as staple fiber nonwovens, especially carded materials, are typically used to manufacture the secondary separator. As shown in the figure of EP 1 738 816 B1, the secondary separator is constructed in a single layer. The single-layer nonwoven layer of the secondary separator is conventionally formed into a tube by sewing or welding and then pulled over the support tube.

[0008] The invention is based on the object of further developing a coalescence separator insert of the type mentioned above, a coalescence separator of the type mentioned above, and a method of the type mentioned above in such a way that the coalescence separator insert can be manufactured particularly simply, cost-effectively, and with a wide variety of variants, while still achieving a high separation efficiency. In particular, the secondary separator should be manufactured from simple or cost-effective coalescence separator medium material.

[0009] Disclosure of the invention

[0010] This object is achieved by a coalescence separator insert having the features specified in claim 1, by a coalescence separator having the features specified in claim 10, and by a method having the features specified in claim 13. Advantageous embodiments and expedient further developments of the present invention are characterized in the respective dependent claims. Thus, the present invention is based on the fact that the additional coalescence separator medium of the additional coalescence separator body, which is designed in particular as a secondary separator, is wound in multiple layers at least in some regions, for example, is wound in multiple layers around the additional support tube, and has at least two coalescence separator medium layers arranged overlapping one another in the flow direction of the gas stream.

[0011] This multi-layer design makes it possible to easily adapt the further coalescing separator body to different requirements of the coalescing separator application.

[0012] The additional support tube is optional. In principle, the structure of the multi-layer coalescing separator body can function without an additional support tube. The additional support tube is a cylindrical hollow body, which can be made of metal, plastic, or fabric, for example.

[0013] To secure the winding of the additional coalescing separator body, the overlapping coalescing separator medium layers are interconnected at least in some areas. In particular, at least the radially outer overlapping coalescing separator medium layers of the additional coalescing separator body have interconnected securing regions designed to secure the winding.

[0014] The overlapping arrangement or the overlap advantageously amounts to at least one sixteenth of a winding turn, for example one eighth of a winding turn, preferably at least one quarter of a winding turn, of the winding of the outer coalescence separator medium layer of the further coalescence separator body.

[0015] A cost-effective way to produce the additional coalescing separator body of the coalescing separator insert according to the invention consists in winding a web of the additional coalescing separator medium and then securing overlapping layers of the additional coalescing separator medium to the additional coalescing separator body. The securing can be achieved, for example, by joining and / or gluing and / or sewing. Securing by joining techniques, particularly welding, can be achieved particularly efficiently.

[0016] Advantageously, the coalescence separator medium layers arranged overlapping one another are connected to one another by means of fixing areas provided by means of a joining technique, in particular by means of the technique of welding and / or gluing and / or sewing.

[0017] Compared to the previous production of a secondary separator, in which the separator is formed into a tube, secured, and then pulled over the additional support tube, the additional coalescing separator body produced according to the present invention, in which the additional coalescing separator medium is wound, for example, onto the additional support tube, and overlapping areas are secured together at least in sections, is a significantly more cost-effective method of production. Furthermore, the additional coalescing separator body produced according to the present invention is easily adaptable to different separation requirements.

[0018] An advantageous embodiment of the present invention comprises, for example, a further coalescing separator body wound essentially in a single layer, but at least one region of the further coalescing separator body is formed in two layers and has overlapping coalescing separator medium layers which are at least partially connected to one another or fixed to one another.

[0019] In a further embodiment of the present invention, the entire further coalescing separator body is constructed in multiple layers. For example, the secondary separator can be formed from a multi-layer drainage material. This multi-layer winding allows for easy adaptation of the secondary separator to different dimensional and / or separation requirements.

[0020] An advantage of the present invention is that the number of layers of the additional coalescing separator body can be selected depending on the required separation efficiency. This makes it possible to manufacture different separator variants using the same coalescing separator material. In contrast, with single-layer secondary separators known from the prior art, a specific, individually adapted coalescing separator material with a defined material thickness must be produced to produce different separator variants.

[0021] The overlapping of the layers of the additional coalescing separator body provided according to the invention also makes it possible to connect the overlapping coalescing separator medium layers of the additional coalescing separator body only locally. For example, the fixing regions can be spaced apart from one another in the direction of the longitudinal axis of the additional coalescing separator body and separated from one another by unconnected regions of the additional coalescing separator body.

[0022] The respective layers of the secondary separator can thus be bonded together, for example, by means of at least two fixing areas. In the prior art, however, the single-layer secondary separator medium is connected to the hose by means of a continuous connecting seam. In the present invention, it was surprisingly discovered that even a discontinuous, i.e., interrupted seam, connects the layers of the additional coalescing separator body sufficiently tightly to maintain the coalescing separator's performance without reduction.

[0023] Applying an interrupted seam with local, spaced-apart fixation areas is particularly advantageous when manually manufacturing the coalescing separator insert. To create a continuous seam, the coalescing separator insert would have to be clamped and aligned in a fixture to place the seam in a straight line in the desired area. Local fixation areas, on the other hand, can be applied manually without clamping and aligning the coalescing separator insert. This has the advantage that the secondary separator can be manufactured more efficiently.

[0024] In addition, the application of localized fixation areas is significantly faster in manual production than creating a continuous seam. This significantly simplifies the manual production of the coalescing separator insert.

[0025] In an advantageous embodiment of the present invention, for example, a coalescence separator medium material known from the prior art for secondary separators can be wound in two layers, for example, wound in two layers around the additional support tube. This is particularly advantageous when increased demands are placed on the separation efficiency of the secondary separator.

[0026] Furthermore, a multi-layer structure of the secondary separator allows it to be manufactured from coalescence separator media, such as nonwovens, which are lighter than the single-layer secondary separator media known in the prior art and are available in large quantities and at low cost for standard applications. For example, the additional coalescence separator body can be formed from at least one coalescence separator medium, such as a nonwoven fabric, which, in the form of a single (endless) flat layer, has a mass per unit area of ​​up to 300 grams per square meter (g / m 2 ), approximately from 25 to 250 g / m 2 , preferably from 50 to 200 g / m 2 has.

[0027] The material used for the additional coalescing medium can be staple fiber nonwovens, spunbonded nonwovens, and / or meltblown nonwovens. Spunbonded nonwovens are usually thin. The multi-layer structure allows for the formation of thick layers. Staple fiber nonwovens produce relatively thick, cost-effective layers, even with just a few layers.

[0028] Furthermore, the material of the further coalescing separator medium may comprise at least substantially polyester, polyamide or glass fibers or mixtures thereof.

[0029] Advantageously, the radial thickness of the further coalescing separator body is less than the radial thickness of the first coalescing separator body.

[0030] A thickness of all coalescence separator medium layers of the further coalescence separator body of an advantageous embodiment of the present invention, determined for example according to DIN EN ISO 9073-2, i.e. at a contact pressure of 0.5 kPa, is in total more than two millimeters (mm), in particular more than 2.5 mm, for example 4 mm to 10 mm.

[0031] In a further advantageous embodiment, the further coalescence separator body is designed in such a way that at a pressure difference of 200 Pascal [Pa], an air permeability through the further coalescence separator body, determined for example according to DIN EN ISO 9237, of more than 300 liters per square meter second [l / m 2 s] and less than 4500 liters per square meter second [l / m 2 s]. In comparison, the air permeability of the first coalescing separator body, in particular the main separator, is advantageously less than 400 l / m 2s, for example 5-300 l / m 2 see

[0032] In conjunction with this or alternatively, in an advantageous embodiment of the present invention, the first coalescing separator body can be arranged, in particular wound, in multiple layers around the first support tube. The main separator can, for example, consist of several, for example, 3 to 20, coalescing separator medium layers, for example, layers of glass fiber paper.

[0033] The additional coalescing separator body is advantageously designed such that it has a higher gas flow permeability, in particular air permeability, than the respective layers of the first coalescing separator body. For example, a single layer of the main separator can have a lower permeability than the entire secondary separator, for example, half the permeability of the secondary separator.

[0034] The present invention provides a coalescing separator insert and a coalescing separator with a post-separator optimized with regard to separation, drainage and manufacturing.

[0035] Finally, the present invention relates to the use of at least one coalescing separator insert of the type described above and / or a coalescing separator insert produced by the method of the type described above and / or a coalescing separator designed according to the type described above for de-oiling air in a compressed air or vacuum system which is fed by a connecting element of a machine, for example a compressor or a vacuum pump, for example an oil-lubricated one, wherein the compressed air system is advantageously further designed to return the separated oil to the connecting element, or for de-oiling crankcase gases of an internal combustion engine or a piston compressor.

[0036] For example, the coalescing separator insert of the present invention can be used in the following applications: in a spin-on coalescing separator or spin-on air oil separator, in a compressor designed to compress air, in a compressor designed to separate oil with the oil being returned to the oil circuit, and in applications with oils of viscosity class VG32 and higher.

[0037] Short description of the drawings

[0038] As already discussed above, there are various possibilities for advantageously embodying and developing the teaching of the present invention. For this purpose, reference is made, on the one hand, to the claims subordinate to claim 1, claim 10, and claim 13. On the other hand, further embodiments, features, and advantages of the present invention are explained in more detail below, inter alia, with reference to the exemplary embodiments illustrated by Figures 1 to 8.

[0039] It shows:

[0040] Fig. 1 shows a schematic representation of a first embodiment of a coalescing separator according to the present invention, the coalescing separator insert of which is manufactured according to the method according to the present invention;

[0041] Fig. 2 shows a schematic representation of a second embodiment of a coalescing separator according to the present invention, the coalescing separator insert of which is manufactured according to the method according to the present invention;

[0042] Fig. 3 shows a perspective view of the further coalescing separator body of the coalescing separator insert from Figure 1 or the coalescing separator insert from Figure 2;

[0043] Fig. 4 shows a cross-section of the further coalescing separator body from Fig. 3, in which the various coalescing separator medium layers are visible;

[0044] Fig. 5 is a front view of the further coalescing separator body from Figure 3;

[0045] Fig. 6 is a side view of the further coalescing separator body from Fig. 3;

[0046] Fig. 7 shows another embodiment of a coalescing separator insert manufactured by the method according to the present invention; and

[0047] Fig. 8 shows a longitudinal section of the coalescence separator insert from Figure 7.

[0048] Identical or similar configurations, elements or features are provided with identical reference numerals in Figs. 1 to 8.

[0049] Embodiment(s) of the invention

[0050] To avoid unnecessary repetition, the following explanations regarding the configurations, features and advantages of the present invention (unless stated otherwise) refer both to the first exemplary embodiment shown in Figure 1 for a coalescing separator 200 comprising a first exemplary embodiment of a coalescing separator insert 100 according to the present invention and to the second exemplary embodiment shown in Figure 2 for a coalescing separator 202 according to the present invention, as well as to the further exemplary embodiment shown in Figures 7 and 8 for a coalescing separator insert 102 according to the present invention.

[0051] Figure 1 shows a longitudinal section through a coalescence separator, specifically a so-called spin-on air-oil separator 200. This separator is designed to separate particles from a gas or gas mixture, in particular to separate aerosols formed from liquids from air. The liquid to be separated can be, for example, oil, fuel, hydraulic fluid, or coolant.

[0052] The coalescing separator 200 has a cup-shaped, pressure-resistant housing body 210, in which an exemplary embodiment of a coalescing separator insert 100 designed according to the present invention is accommodated. A cover 212 serves to close the open end of the housing body 210. For supplying raw gas, the coalescing separator 200 has a raw gas inlet 220, which can be connected to a raw gas supply of a connecting element of a machine, for example, a working machine, in particular a compressor, for example, an air compressor, such as a screw compressor. For discharging the purified clean gas, the coalescing separator 200 has a clean gas outlet 240, which can be connected to a clean gas supply of the connecting element.

[0053] In the spin-on air-oil separator 200 shown in Figure 1, the raw gas inlet 220 and the clean gas outlet 240 are arranged on the cover 212, with the clean gas outlet 240 having a central cylindrical recess in which a particularly tubular nipple 242 extending axially through the cover 212 can be arranged. The nipple 242 is assigned to the connection element.

[0054] Furthermore, the lid 212 shown in Figure 1 has at least one closure element which can be moved by means of a rotational movement of the lid 212 between an open position, in which the nipple 242 can be guided through the lid 212 along a central axis L of the cup-shaped housing body 210, and a closed position in which the nipple 242 is firmly connected to the lid 212.

[0055] The hollow cylindrical coalescence separator insert 100 shown in Figures 1 and 2 has on its respective end face an end plate 50, 50', 52, 52' designed to cover the end face.

[0056] Figure 2 shows the coalescing separator insert in a cup-shaped housing body, namely a compressed air tank 210. This differs from the spin-on air-oil separator 200 in particular in that the raw gas inlet 220 is arranged on the compressed air tank 210, the clean gas outlet 240 is arranged on the cover 212, and the end plate 50' facing the cover 212 has a radially extending flange 54' designed for arranging the coalescing separator insert 100 in the pressure-resistant housing 210.

[0057] The coalescing separator insert 100 shown in Figures 1 to 6 serves to clean air flowing through it from the outside in. The coalescing separator insert 102 shown in Figures 7 and 8 is flowed through from the inside out.

[0058] In this context, the term "outward" refers to a direction that is perpendicular to the longitudinal axis of the coalescing separator insert and, starting from the longitudinal axis of the coalescing separator insert, is directed radially outwards, i.e., towards the outer circumference of the coalescing separator insert. The term "inward", on the other hand, refers to a direction that is perpendicular to the longitudinal axis of the coalescing separator insert and, starting from the outer circumference of the coalescing separator insert, is directed radially inwards, i.e., towards the axis or center of the coalescing separator insert. A main separator 10 of the coalescing separator insert 100, which operates according to the coalescing principle, is arranged around an air-permeable, cylindrical supporting support tube 12, approximately wound in multiple layers around the support tube 12.

[0059] The main separator 10 can, for example, be made of glass fiber paper and contain a significant proportion of microglass fibers. For example, the main separator can comprise 5 to 20, approximately 15, individual layers. Each of these layers can, for example, have a weight of approximately 60 to 200 grams per square meter (g / m 3 ) and / or at a pressure of 200 Pascal [Pa] an air permeability of 5 l / m, for example as determined according to DIN EN ISO 9237 2 s up to 300 l / m 2 s and / or a thickness of approximately 0.4 mm to 1 mm, measured, for example, at a pressure of 10 kPa in accordance with ISO 543.

[0060] Arranged radially inside (see Figures 1 to 6) or radially outside (see Figures 7 and 8) a first coalescing separator body 10, namely a main separator 10, is a further coalescing separator body 20, namely a secondary separator, operating according to the coalescing principle. This secondary separator 20 is arranged concentrically or coaxially to the main separator 10 and can be spaced from the main separator 10 by a drainage chamber 30. In addition to draining the separated droplets, the drainage chamber 30 also ensures that the coalescing separator media of the main separator 10 and the secondary separator 20 do not become entangled when the coalescing separator insert is assembled.

[0061] To ensure that the secondary separator 20 can withstand the pressure of the air flowing through it, it is wound around an additional supporting tube 22. The winding is formed in multiple layers and is held together by local fixing areas 26, in particular by welding points.

[0062] The fixing regions 26 are distributed over the length of the post-separator 20, in particular along the longitudinal axis L of the post-separator, and are arranged at an axial distance from one another.

[0063] Figures 3 to 6 show the post-separator 20, wherein the local welding areas 26 as well as the individual layers 24, 25 of the post-separator 20 are shown.

[0064] The secondary separator layers 24, 25 and the main separator layer 10 are shown in Figure 2 in a row arrangement, in which the air flow runs from outside to inside. Alternatively, however, in the present invention, the air flow can also run from inside to outside, in which case the secondary separator layers 24, 25 would then be located radially closer to the longitudinal axis L of the coalescing separator insert 100 than the main separator 10.

[0065] The drainage layers 24, 25 are therefore always located downstream of the main separator 10. This means that with a gas flow from the outside to the inside, the drainage layers 24, 25 are closer to the longitudinal axis L of the coalescing separator insert 100; 102, and with a gas flow from the inside to the outside, the main separator 10 is closer to the longitudinal axis L of the coalescing separator insert 100.

[0066] The secondary separator 20 can, for example, have the following features: be constructed from nonwovens, for example staple fiber fleece, spunbond, or meltblown, be constructed from the materials polyester, polyamide, glass or mixtures thereof, the air permeability of the entire secondary separator, determined for example according to DIN EN ISO 9237, can be significantly higher, for example by a factor of two, than the air permeability of the individual coalescence layers of the main separator 10 the thickness of the entire secondary separator, determined for example according to DIN EN ISO 9073-2, can be at least 3 mm, the thickness of the entire secondary separator 10 can be smaller than the thickness of the main separator 20 and the air permeability of the entire secondary separator, determined for example according to DIN EN ISO 9237, can be between 300 L / m 2 s and 4500 L / m 2 s at 200 Pa.

[0067] The multi-layer arrangement of the post-separator 20 offers the following advantages: the separation efficiency of the post-separator is significantly increased, the drainage properties are not negatively affected, which can be the case, for example, when using a single-layer post-separator with a higher separation efficiency, the overall greater thickness of the post-separator increases the drainage of the coalesced droplets, which is particularly advantageous for larger coalescing separators, and compared to the use of an individually adapted single-layer coalescing separator body, the multi-layer arrangement of a conventional coalescing separator medium material is economically better and also allows the individual adaptation of the post-separator with regard to its separation efficiency.

[0068] The further embodiment of a coalescing separator insert 102 shown in Figures 7 and 8 differs from the coalescing separator insert 100 shown in Figures 1 to 6 in the direction of flow of the gas stream. In the coalescing separator insert 102 shown in Figures 7 and 8, the gas stream flows from the inside to the outside through the coalescing separator insert 102 in the use position. List of Reference Symbols

[0069] 10 First coalescence separator body for separating liquid (droplets) from a gas stream, such as oil (droplets) from a (compressed) air stream, in particular main separator medium body or main separator body, comprising the first coalescence separator medium in ready-to-use, optionally cut, stacked, wound, folded, etc. form

[0070] 12 first support tube, in particular main separator support tube, for example, designed to support the first coalescence separator medium 10, first central tube

[0071] 20 further coalescence separator body, in particular post-separator medium body or post-separator body, comprising the further coalescence separator medium in ready-to-use, optionally cut, stacked, wound, folded, etc. form

[0072] 22 further support tube, in particular post-separator support tube, for example further central tube designed to support the further coalescence separator body 20

[0073] 24 first coalescence separator medium layer of the further coalescence separator body 20, in particular first layer of the post-separator 20

[0074] 25 further coalescence separator medium layer of the further coalescence separator body 20, in particular further layer of the post-separator 20

[0075] 26 Fixing area, in particular connecting area, for example area connected by means of the technique of welding and / or gluing and / or sewing, of the further coalescing separator body 20

[0076] 30 drainage chamber arranged between the first coalescence separator body 10 and the further coalescence separator body 20 for removing oil separated by the first coalescence separator body 10

[0077] 50 end plate of the coalescence separator insert 100, 102 of the coalescence separator 200 facing the cover 212 (first embodiment, see Figure 1 )

[0078] 50' end plate of the coalescing separator insert 100 of the coalescing separator 202 facing the cover 212 (further embodiment, see Figure 2)

[0079] 52 end plate of the coalescing separator insert 100, 102 of the coalescing separator 200 facing away from the cover 212 (first embodiment, see Figure 1 )

[0080] 52' end plate of the coalescing separator insert 100 of the coalescing separator 202 facing away from the cover 212 (further embodiment, see Figure 2)

[0081] 54' flange of the end plate 50 of the coalescing separator insert 100

[0082] 100 Coalescence separator insert, first embodiment; see Figures 1 to 6

[0083] 102 Coalescence separator insert, further embodiment; see Figures 7 and 8

[0084] 200 Coalescence separator, in particular Spin-on Air Oil Separator, first embodiment, see Figure 1

[0085] 202 Coalescence separator, second embodiment, see Figure 2

[0086] 210 Housing body of a pressure-resistant housing of the coalescing separator 200

[0087] 212 Cover of the pressure-resistant housing of the coalescing separator 200

[0088] 220 Raw gas inlet of the coalescence separator 200

[0089] 230 Outlet for the separated liquid, e.g. for separated oil 240 Clean gas outlet of the coalescence separator 200

[0090] 242 Clean gas outlet of the connection element, in particular nipple

[0091] 320 Raw gas supply of the connection element

[0092] 330 Clean gas discharge of the connecting element D20 radial thickness of the further coalescence separator body 20 (see Figure 4)

[0093] L Longitudinal axis of the further coalescing separator body 20 or central axis of the housing body 210

Claims

Claims 1 . Coalescence separator insert (100; 102) for separating liquid, in particular liquid droplets, for example oil, such as oil droplets, from a gas stream, in particular from an air stream, for example from a compressed air stream, wherein the gas stream flows from the outside inwards or from the inside outwards through the coalescence separator insert (100; 102) in the position of use of the coalescence separator insert (100; 102), comprising - at least one first coalescence separator body (10), comprising at least one first coalescence separator medium designed to separate liquid from the gas stream by means of the coalescence principle, which is arranged around an air-permeable, cylindrical first support tube (12) designed to support the first coalescence separator body (10), and - at least one further coalescence separator body (20), comprising at least one further coalescence separator medium designed to separate liquid from the gas stream by means of the coalescence principle, arranged downstream of the first coalescence separator body (10) in the flow direction of the gas stream, which further coalescence separator medium is arranged concentrically to the first coalescence separator body (10), for example, is wound around a further support tube (22) designed to support the further coalescence separator body (20), characterized in that the further coalescence separator medium is wound in multiple layers at least in some regions, for example, is wound in multiple layers at least in some regions around the further support tube (22), and the further coalescence separator body (20) comprises at least in some regions at least two coalescence separator medium layers (24,25) and, for fixing the winding of the further coalescence separator body (20), the coalescence separator medium layers (24, 25) arranged overlapping one another are at least partially connected to one another.

2. Coalescence separator insert according to claim 1, characterized in that for fixing the winding of the further coalescence separator body (20), the coalescence separator medium layers (24, 25) arranged overlapping one another are connected to one another in at least two areas by means of a joining technique, in particular by means of the technique of welding and / or gluing and / or sewing, to form fixing areas (26), wherein the fixing areas (26) are spaced apart from one another in the direction of the longitudinal axis (L) of the further coalescence separator media body.

3. Coalescence separator insert according to claim 2, characterized in that in the direction of the longitudinal axis (L) of the further coalescence separator media body, fixing regions (26) and unconnected, overlapping regions of the coalescence separator medium layers (24, 25) are arranged alternately and form an interrupted seam running in the direction of the longitudinal axis (L) of the further coalescence separator media body.

4. Coalescence separator insert according to at least one of claims 1 to 3, characterized in that the further coalescence separator medium (24, 25) has a mass per unit area of ​​up to 300 grams per square meter (g / m 2 ), approximately from 25 to 250 g / m 2 , preferably from 50 to 200 g / m 2 , has.

5. Coalescence separator insert according to at least one of claims 1 to 4, characterized in that the material of the further coalescence separator media body (20) comprises polyester and / or polyamide and / or glass fibers.

6. Coalescence separator insert according to at least one of claims 1 to 5, characterized in that the radial thickness (D20) of the further coalescence separator body (20) is less than the radial thickness of the first coalescence separator body (10).

7. Coalescence separator insert according to at least one of claims 1 to 6, characterized in that the overlapping arrangement of the radially outer coalescence separator medium layer (25) of the further coalescence separator body (20) amounts to at least one sixteenth, for example at least one eighth, preferably at least one quarter, of a winding turn of the winding of the further coalescence separator body (20).

8. Coalescence separator insert according to at least one of claims 1 to 7, characterized in that the further coalescence separator body (20) is designed such that at a pressure of 200 Pascal [Pa] a gas flow permeability, in particular air permeability, determined for example according to DIN EN ISO 9237, through the further coalescence separator body (20) of more than 300 liters per square meter second [l / m 2 s] and less than 4500 liters per square meter second [l / m 2 s] is.

9. Coalescence separator insert according to at least one of claims 1 to 8, characterized in that the first coalescence separator body (10) is designed in multiple layers, for example arranged in multiple layers around the first support tube (12), in particular wound, and / or the further coalescence separator body (20) is designed such that it has a higher gas flow permeability, in particular air permeability, than the respective layers of the first coalescence separator body (10).

10. Coalescence separator (200; 202) comprising a coalescence separator insert (100; 102) according to one of claims 1 to 9 and a pressure-resistant housing for receiving the coalescence separator insert (100; 102), wherein the pressure-resistant housing comprises - a cup-shaped housing body (210), - a cover designed to close the open end face of the housing body (210) - a raw gas inlet (220) designed to supply raw gas into the coalescence separator, which can be connected to a raw gas supply of a connecting element of a machine, and - a clean gas outlet (240) designed to discharge clean gas, which can be connected to a clean gas discharge of the connecting element.

11. Coalescence separator according to claim 10, wherein - the raw gas inlet (220) and the clean gas outlet (240) are arranged on the cover (212), wherein - the clean gas outlet (240) has a central cylindrical recess in which a nipple (242) of a connecting element extending axially through the cover (212), in particular a tubular nipple, can be arranged, and - the lid (212) has at least one closure element which is movable by means of a rotational movement of the lid (212) between an open position in which the nipple (242) can be guided through the lid (212) along a central axis (L) of the cup-shaped housing body (210), and a closed position in which the nipple is firmly connected to the lid (212).

12. Coalescing separator according to claim 10, wherein - the raw gas inlet (220) is arranged on the cup-shaped housing body (210), - the clean gas outlet (240) is arranged on the cover (212) and - the coalescing separator insert (100; 102) is hollow-cylindrical and has on its respective end face an end plate (50, 52; 50', 52') designed to cover the end face, wherein the end plate (50; 50') facing the cover (212) has a radially extending flange (54') designed to arrange the coalescing separator insert (100; 102) in the pressure-resistant housing (210).

13. A method for producing a coalescence separator insert (100; 102) for cleaning a gas stream which, in the use position of the coalescence separator insert (100; 102), flows from the outside to the inside or from the inside to the outside through the coalescence separator insert (100; 102), wherein (i) to provide a first coalescence separator body (10), at least one first coalescence separator medium designed to separate liquid, in particular liquid droplets, for example oil, such as oil droplets, from a gas stream, in particular from an air stream, for example from a compressed air stream, by means of the coalescence principle is arranged around a cylindrical, air-permeable first support tube (12) designed to carry the first coalescence separator medium, and (ii) to provide a further coalescence separator body (20), at least one further coalescence separator medium designed to separate liquid from the gas stream by means of the coalescence principle is arranged concentrically to the first coalescence separator body (10) is arranged, for example, around a cylindrical, air-permeable, further support tube (22) designed to carry the further coalescence separator medium, characterized in that when arranging the further coalescence separator body as described in step (ii) - the further coalescence separator medium is wound in such a way that the further coalescence separator body (20) is formed in several layers at least in some regions and has at least two coalescence separator medium layers (24, 25) arranged overlapping one another in the flow direction of the gas stream to be cleaned, and - to stabilize the winding of the further coalescence separator body (20), which is arranged, for example, on the further support tube (22), at least regions of the coalescence separator medium layers (24, 25) arranged overlapping one another are connected to one another.

14. The method according to claim 13, characterized in that in order to stabilize the winding, which is arranged, for example, on the further support tube (22), a plurality of regions (26) of the further coalescing separator body (20) distributed over the length, in particular along a longitudinal axis (L), of the further coalescing separator body (20) and each arranged at an axial distance from one another are connected to one another, in particular welded, glued or sewn.

15. Use of at least one coalescing separator insert (100; 102) designed according to at least one of claims 1 to 9 and / or a coalescing separator insert (100; 102) produced according to the method according to at least one of claims 13 to 15 and / or a coalescing separator (200; 202) designed according to at least one of claims 10 to 12 - for de-oiling air in a compressed air or vacuum system which is fed by a connecting element of a machine, for example an oil-lubricated one, such as a compressor or a vacuum pump, wherein the compressed air system is advantageously further designed to return the separated oil to the connecting element, or - for deoiling crankcase gases from an internal combustion engine or a piston compressor.

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