Homogenizing valve

Abstract

A homogenizing valve (1) for a medium to be homogenized under systemic pressure has a valve housing (2) with an inlet channel (21) and an outlet channel (22) for the medium, a valve seat (4) which is arranged in the valve housing (2) and has a receptacle (42) through which a valve body (3) extends movably in the direction of its longitudinal axis (L), a pressure chamber (7) which is connected to the inlet channel (21) and is formed integrally in the receptacle (42) of the valve seat (4) and / or the jacket surface (33) of the valve body (3), and an adjustment unit (5) which is operatively connected to the valve body (3) and with which the axial position of the valve body (3) in the receptacle (42) is adjustable, wherein a flow of medium from the inlet channel (21) to the outlet channel (22) can be regulated by movement of the valve body (3) in the valve seat (4), wherein the valve seat (4) together with the valve body (3) is designed, on both sides of the pressure chamber (7) in the direction of movement of the valve body (3), with a shear gap formed by a blade edge (8a, 8b) and by a wall region shaped conically with respect to the latter and, downstream of the shear gap in the direction of flow, with an expansion chamber (9) connected to the outlet channel (22) . The document also describes a homogenizing valve with a mobile valve seat and a static valve body.

Description

[0001] Homogenization valve

[0002] The present invention relates to a homogenizing valve according to the preamble of claim 1 and to a further homogenizing valve according to the preamble of claim 19.

[0003] Such homogenizing valves are used to evenly divide the various components in fruit juices, dairy products, or similar products and distribute them homogeneously throughout the medium. To this end, the medium to be homogenized is passed over a shearing edge under high pressure (usually greater than 150 bar), behind which the medium to be homogenized expands, effectively breaking down fruit fibers in fruit juice or fat droplets in emulsions such as milk.

[0004] Particularly when using high pressures for homogenization, large adjustment forces are required to set the homogenization gap in the homogenization valve. The required large adjustment forces result from the operating pressure acting on the pressurized surfaces of the valve body in the adjustment direction.

[0005] The object of the present invention is to provide a homogenizing valve whose valve body can be controlled or moved with significantly lower adjustment forces.

[0006] This object is achieved by a homogenizing valve having the features of claim 1.

[0007] The homogenizing valve according to the invention for a medium to be homogenized under system pressure has a valve housing with an inlet channel and an outlet channel for the medium.

[0008] The homogenizing valve further comprises a valve seat arranged in the valve housing with a receptacle through which a valve body extends movably in the direction of its longitudinal axis. A pressure chamber connected to the inlet channel is formed in the receptacle of the valve seat and / or the outer surface of the valve body.

[0009] Furthermore, an actuating unit is provided, which is operatively connected to the valve body. The actuating unit adjusts the axial position of the valve body in the housing. Axial movement is defined as movement axial to an imaginary center axis of the housing.

[0010] By moving the valve body in the valve seat, a flow resistance from the inlet channel to the outlet channel can be regulated.

[0011] Between the inner wall of the valve seat forming the receptacle and the valve body, on both sides of the pressure chamber, viewed in the direction of displacement of the valve body, there is a shear gap formed by a knife edge and a conically shaped wall area opposite the knife edge and an expansion chamber which is provided downstream of the shear gap in the flow direction and is connected to the outlet channel.

[0012] By arranging such a shear gap on both sides of the pressure chamber, virtually no resulting force acts on the movable valve body in the direction of the longitudinal axis of the valve body, which corresponds to the direction of movement of the valve body.

[0013] Accordingly, the shear gap can be adjusted by moving the valve body using the adjusting unit with extremely little effort.

[0014] Advantageous embodiments of the invention are the subject of the subclaims.

[0015] According to an advantageous embodiment, the length of a first of the knife edges near the adjusting unit is greater in the circumferential direction than the length of a second of the knife edges which is arranged away from the adjusting unit.

[0016] This allows for extremely simple axial installation of the valve body into the valve seat. According to a preferred embodiment, the knife edges are doubly conical in shape, viewed in the direction of the longitudinal axis of the valve body.

[0017] According to a first preferred embodiment, the knife edges are positioned on an outer surface of the valve body between regions of the receptacle which are conically shaped in the direction of displacement of the valve body.

[0018] In particular, the knife edges on the outer surface of the valve body can be formed with extreme precision during the valve body molding process.

[0019] According to another design variant, the knife edges are designed as a separate component attached to the outer surface of the valve body. This design allows the valve body components to be manufactured from different materials. In particular, the knife edges can be made of a particularly hard material to further increase their service life.

[0020] According to an alternative embodiment, a reverse arrangement is also conceivable, in which the knife edges are positioned on an inner surface of the valve seat between regions of the outer surface of the valve body that are conically shaped in the direction of displacement of the valve body.

[0021] Both versions allow the shear gap to be easily adjusted by moving the valve body in the valve seat.

[0022] According to a further preferred embodiment, guide surfaces are provided on inner surfaces of the valve seat and outer surfaces of the valve body, wherein grooves connected to the respective expansion chamber are introduced on the guide surfaces of the valve seat and / or the valve body.

[0023] The grooves cause an additional counter-flow of the expanded medium by channeling the medium as it enters the grooves from the expansion chamber.

[0024] According to a preferred embodiment, the grooves extend linearly parallel to the direction of movement of the valve body. A curved design of the grooves is also conceivable. According to a preferred embodiment, the grooves are formed into the guide surfaces of the valve body.

[0025] In an alternative design variant, the grooves are formed into the guide surface of the valve seat.

[0026] According to a further preferred embodiment, the guide surfaces of the valve body and the valve seat are conically shaped in the direction of the longitudinal axis of the valve body.

[0027] In an alternative design variant, the guide surfaces of the valve body and the valve seat are cylindrically shaped in the direction of the longitudinal axis of the valve body.

[0028] This design variant enables even more precise guidance of the valve body in the valve seat.

[0029] According to a further preferred embodiment, channels connected to the outlet are provided in the valve housing downstream of the valve body.

[0030] According to a preferred development, these channels open into a mixing region of the outlet or a mixing chamber upstream of the outlet, wherein a nozzle is arranged upstream in each of the channels, the jet direction of which is aligned with one another.

[0031] These nozzles allow a mutual flow of the already expanded medium, which further increases the quality of homogenization.

[0032] In a further preferred embodiment, a diameter of the conically shaped receptacle and of the part of the valve body formed with a conically shaped outer surface is designed to increase towards the actuating unit.

[0033] The valve seat is preferably installed in a fixed position within the valve housing. As an alternative design, it is also conceivable to form the valve seat as part of the valve housing.

[0034] In a further preferred embodiment, an elastic structural unit is arranged between the actuating unit and the valve body.

[0035] The elastic assembly, preferably designed as a spring package with at least two disc springs, thus makes it easy to avoid blockages in the pressure chamber, since when the operating pressure increases, the valve body is briefly moved in the direction of the actuating unit to relieve pressure due to the different areas of the knife edges on both sides of the pressure chamber, whereby the gap height briefly increases until the initial operating pressure in the pressure chamber is reached again and as a result the valve body is automatically pushed back into its initial position by the force of the elastic assembly.

[0036] A further alternative embodiment of a homogenizing valve according to the invention comprises a valve housing with an outlet channel for the medium and a valve seat arranged in the valve housing along a displacement axis with an at least partially conically shaped receptacle in which a valve body fixed to the valve housing with an at least partially conically shaped outer surface and an inlet channel is mounted.

[0037] A pressure chamber is connected to the inlet channel, which is formed in the receptacle of the valve seat and / or the outer surface of the valve body.

[0038] An actuating unit is operatively connected to the valve seat. The medium flow from the inlet channel to the outlet channel can be controlled by the interaction of the valve body and the valve seat.

[0039] Here, too, a shear gap formed by a knife edge and a conically shaped wall area opposite it is formed between the inner wall of the valve seat, which forms the receptacle, and the valve body on either side of the pressure chamber in the direction of displacement of the valve body. An expansion chamber connected to the outlet channel is formed downstream of the shear gap in the flow direction. In this design variant, too, the central feed of the medium to be homogenized through the valve body into the pressure chamber, from where the medium flows further over the knife edges in the direction of displacement of the valve body, enables the shear gap to be adjusted with very little force—here, by moving the valve seat.

[0040] Preferred embodiments are explained in more detail below with reference to the accompanying drawings. They show:

[0041] Figure 1 is a schematic sectional view through a variant of a homogenizing valve according to the invention with a fixed valve seat and axially movable valve body,

[0042] Figure 2 is a sectional view corresponding to Figure 1 with a plan view of a non-sectioned valve body,

[0043] Figure 3 is a sectional view corresponding to Figure 1 of a further embodiment of a homogenizing valve with additional nozzles,

[0044] Figure 4 is an isometric detail view of a variant of a valve body with knife edges formed thereon and guide surfaces provided with grooves,

[0045] Figure 5 is a sectional view through the valve body shown in Figure 4, inserted into a valve seat,

[0046] Figure 6 is an isometric sectional view through a valve seat with knife edges arranged in the receiving space and guide surfaces with grooves therein,

[0047] Figure 7 is a sectional view through the valve seat shown in Figure 6 with the valve body inserted therein with a conically shaped outer surface,

[0048] Figures 8 and 9 show sectional views corresponding to Figures 5 and 7 through further embodiments of valve seats and valve bodies accommodated therein,

[0049] Figure 10 is a schematic sectional view of a further embodiment of a homogenizing valve according to the invention with a movable valve seat and a fixed valve body and

[0050] Figure 11 shows a representation corresponding to Figure 1 of a further embodiment variant of a homogenizing valve according to the invention with an additional elastic structural unit between the valve body and the actuating unit.

[0051] In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc., refer exclusively to the exemplary representation and position of the homogenizing valve, valve housing, valve seat, valve body, knife edges, expansion chamber, and the like chosen in the respective figures. These terms are not to be understood as limiting; i.e., these references may change due to different operating positions or the mirror-symmetrical design, etc.

[0052] In Figure 1, the reference number 1 denotes an embodiment variant of a homogenizing valve according to the invention.

[0053] The homogenizing valve 1 has a valve housing 2 with an inlet channel 21 and an outlet channel 22 for the medium to be homogenized.

[0054] A valve seat 4 is arranged in the valve housing 2. The valve seat 4 has a receptacle 42 through which a valve body 3 of the homogenizing valve 1 extends movably in the direction of its longitudinal axis L.

[0055] The valve seat 4 can, as shown in Figure 1, be designed as a separate component which is installed in the valve housing 2 and sealed against the valve housing 2 by static high-pressure seals 13.

[0056] It is also conceivable to form the valve seat 4 in one piece with the valve housing 2. The receptacle 42 of the valve seat 4 is designed as a through-opening through which a valve region 33 of the valve body 3 extends.

[0057] By means of an adjusting unit 5, for example in the form of a manually rotatable screw, as shown in Figure 1, the axial position of the valve body 3 in the receptacle 42 can be adjusted.

[0058] In the embodiment shown, the actuating unit 5 is screwed into a guide housing 6, the body 61 of which is firmly screwed to the valve housing 2 by means of fixing screws 62.

[0059] In the embodiment shown here, the guide housing 6 has a receptacle 63 that extends into a receptacle in the valve housing 2. The inner surfaces of this receptacle 63 serve as guide surfaces for a head 31 of the valve body 3, whose guide casing 312 forms sliding surfaces that are displaceable on the inner surface of the receptacle 63 of the guide housing 6 in the direction of the longitudinal axis L of the valve body 3. The longitudinal axis L is also the (imaginary) central axis of the receptacle 42.

[0060] In order to seal the head 31 of the valve body 3 against the inner walls of the receptacle 63 of the guide housing 6, the guide casing 312 of the head 31 of the valve body 3 is provided with a seal receiving groove 313 in which a dynamic low-pressure seal 12 is received.

[0061] The end face 311 of the head 31 of the valve body 3 serves as a contact surface for an end face of the actuating unit 5.

[0062] As further shown in Figures 1 and 2, a pressure chamber 7 connected to the inlet channel 21 is formed in the receptacle 42 of the valve seat 4 and / or the outer surface 33 of the valve body 3.

[0063] In the embodiment shown in Figures 1 and 2, the receptacle 42 of the valve seat 4 is widened in a ring shape around a pressure chamber inlet channel 41 to form the pressure chamber 7.

[0064] Between the inner wall of the valve seat 4 forming the receptacle 42 and the valve body 3, as further shown in Figures 1 and 2, on both sides of the pressure chamber 7 there is a shear gap formed by a knife edge 8a, 8b and a wall region which is conically shaped relative to the knife edge 8a, 8b, and an expansion chamber 9 connected to the outlet channel 22 is formed downstream of the shear gap in the flow direction.

[0065] Since the medium to be homogenized is fed into the pressure chamber 7 via the inlet channel 21 under high pressure, in particular more than 150 bar, the knife edges 8a, 8b provided on both sides of the pressure chamber 7 ensure that virtually no force is exerted on the movable valve body 3 by the high-pressure medium in the direction of adjustment of the valve body 3, ie in the direction of a longitudinal axis L.

[0066] The gap adjustment of the shear gap is carried out by moving the valve body 3 relative to the valve seat 4. The gap size of the shear gap between the knife edges 8a, 8b and the conically shaped wall areas is the same for both sides.

[0067] A preferred setting of the gap size is, depending on the medium to be homogenized, preferably in a range between 0.01 mm and 0.1 mm.

[0068] In all of the embodiments shown, the circumferential length of the knife edge 8a near the adjusting unit 5 is greater than the length of the knife edge 8b remote from the adjusting unit 5. Accordingly, the inner diameter of the receptacle 42 in the region near the adjusting unit 5 is greater than the inner diameter of the receptacle 42 remote from the adjusting unit 5.

[0069] The knife edges 8a, 8b are preferably double-conical, with a front flank narrowing the shear gap from the pressure chamber 7, a short section of constant radial width adjoining this in the direction of the longitudinal axis L of the valve body 3 and a rear flank adjoining this section and widening the shear gap towards the expansion chamber 9.

[0070] While in the embodiments of the homogenizing valve 1 shown in Figures 1-5, the knife edges 8a, 8b are positioned on an outer surface of the valve body 3 between regions of the receptacle 42 that are conically shaped in the direction of displacement of the valve body 3, in the embodiment shown in Figures 6 and 7, the valve region 33' of the valve body 3 is linearly conical. Here, the knife edges 8a, 8b are positioned on an inner surface of the valve seat 4 forming the receptacle 42 between regions of the outer surface of the valve body 3 that are conically shaped in the direction of displacement of the valve body 3.

[0071] In the embodiment shown in Figures 6 and 7, the expansion chamber 9, which is annular here, is also formed into the inner wall of the valve seat 4' forming the receptacle 42'.

[0072] In both embodiments, the knife edges 8a, 8b can be formed on the respective component, i.e. on the valve body 3 in the embodiment shown in Figures 1 to 5 or on the valve seat 4, or can be designed as a separate component that is fastened to the valve body 3 or to the valve seat 4.

[0073] As can be clearly seen in Figures 2 and 4, guide surfaces 34, 35, 43, 44 are provided on the inner surfaces of the valve seat 4 and the outer surfaces of the valve body 3, wherein grooves 10 connected to the respective expansion chamber 9 are introduced on the guide surfaces 43, 44 of the valve seat 4 or guide surfaces 34, 35 of the valve body 3.

[0074] In the embodiment of the homogenizing valve 1 shown in Figures 1-5, these grooves 10 are incorporated into the guide surfaces 34, 35 of the valve body 3. The grooves 10 preferably extend linearly parallel to the direction of movement of the valve body 3.

[0075] As can be clearly seen in Figure 6, in the alternative embodiment of the homogenizing valve 1, the grooves 10 are formed into the guide surfaces 43, 44 of the valve seat 4.

[0076] As can be further seen in Figures 1 to 8, the guide surfaces 34, 35, 43, 44 of the valve body 3 and the valve seat 4 are conically shaped in the direction of the longitudinal axis L of the valve body 3.

[0077] In the further embodiment shown by way of example in Figure 9, the guide surfaces 34''', 35''', 43''' and 44''' are cylindrical, wherein the diameter of the valve body 3 and correspondingly the receptacle 42 of the valve seat 4 in the region of the guide surfaces 34, 43''' is larger than the diameter in the region of the guide surfaces 35''', 44'''. The design of these guide surfaces 34''', 35''', 43''', 44''' as cylindrical surfaces enables a further improved guidance of the valve body 3 in the valve seat 4, because in this case the guide surfaces are in sliding contact with the receptacle 42 in every setting position of the valve body 3.

[0078] As further shown in the embodiment variant shown in Figure 3, channels 23, 24 are provided in the valve housing 2 downstream of the valve body 3, preferably connected to the outlet 22.

[0079] These channels 23, 24 open into a mixing area of ​​the outlet 22 or a mixing chamber 25 upstream of the outlet, so that the medium to be homogenized, after expansion in the two expansion chambers 9, is brought together again in the mixing area of ​​the outlet 22 or in the mixing chamber 25 upstream of it with mutual flow.

[0080] Preferably, a nozzle 11 is arranged in each of the channels 23, 24, wherein the jet directions of the nozzles 11 are aligned such that the two media flows guided through the respective nozzles 11 meet at an accelerated rate in the mixing area of ​​the outlet 22 or in the mixing chamber 25 upstream of the outlet.

[0081] Furthermore, partial flows of the medium also flow towards each other in the two expansion chambers 9, there in the transition area to the grooves 10, through which the medium is discharged from the area of ​​the valve body 3 into the channels 23, 24.

[0082] It is also conceivable, as shown by way of example in Figure 8, to exchange the position of the knife edges 8a, 8b and the guide surfaces 34, 35, 43, 44, so that the medium, after entering the pressure chamber, is first guided through the grooves 10 and only then is guided via the knife edges 8a, 8b into the respective expansion chambers 9.

[0083] In the further embodiment shown in Figure 10, an elastic structural unit 15 is arranged between the actuating unit 5 and the valve body 3. The elastic structural unit 15, which is designed here as a spring assembly with several, in particular at least two, disc springs, serves to ensure that, if the operating pressure increases too sharply during operation, for example as a result of a blockage in the pressure chamber 7, the valve body 3 is displaced against the force of the elastic structural unit 15 to relieve the pressure and thus increases the gap height until the operating pressure reaches its initial value again, so that the valve body 3 is pressed back into its initial position by the elastic structural unit 15.

[0084] The movement of the valve body 3 against the force of the elastic assembly 15 occurs due to the difference between the area of ​​the knife edge 8a on the side of the pressure chamber 7 near the actuating unit 5 and the area of ​​the knife edge 8b on the side of the pressure chamber 7 remote from the actuating unit 5, wherein the area of ​​the knife edge 8a on the side of the pressure chamber 7 near the actuating unit 5 is larger than the area of ​​the knife edge 8b on the side of the pressure chamber 7 remote from the actuating unit 5.

[0085] In this case, adjusting the adjusting unit 5 primarily enables adjustment of the holding force of the elastic assembly 15.

[0086] A further embodiment of such a homogenizing valve 100 is shown in Figure 11.

[0087] In this embodiment, the valve housing 120 is configured with outlet channels 122, 123 for the medium. A valve seat 140 is provided in the valve housing 120, arranged along a displacement axis L, also with an at least partially conically shaped receptacle 142, in which a valve body 130, in this case fixed to the valve housing 120, with an at least partially conically shaped outer surface 133 and an inlet 131, is mounted.

[0088] The inlet 131 is formed here as a channel formed into the valve body along the longitudinal axis from one end face, from whose end several channels branch off radially or approximately radially into a pressure chamber 170 formed in the receptacle 142 of the valve seat 140 and / or the outer surface 133 of the valve body 130. The pressure chamber 170 is also designed in the shape of an annular groove, as in the embodiments shown in Figures 1 to 9. The material recess for forming the pressure chamber 170 is preferably provided in the valve body 130.

[0089] Furthermore, in this embodiment, an actuating unit 150 is operatively connected to the valve seat 140. The medium flow from the inlet 131 to the outlet channel 122 in the valve housing 120 can be regulated by moving the valve seat 140 relative to the valve body 130, which is fixedly mounted on the valve housing 120.

[0090] Here too, between the inner wall of the valve seat 140 forming the receptacle 142 and the valve body 130, in the direction of displacement of the valve body 130, a shear gap is formed on both sides of the pressure chamber 170 by a knife edge 8a, 8b and a wall region conically shaped relative to the knife edge 8a, 8b, and in the flow direction downstream behind the shear gap, an expansion chamber 9 connected to the outlet channel 122 is formed.

[0091] Furthermore, in this embodiment variant, grooves 10 are also provided downstream of the expansion chambers 9, which grooves can also be formed either on the outer surface 133 of the valve body 130 or on the inner surface of the valve seat 140 forming the receptacle 142.

[0092] In the embodiment shown, the knife edges 8a, 8b are formed by the edges of the outer surface 133 of the valve body 130 at the transition to the expansion chambers 9.

[0093] List of reference symbols

[0094] 1 homogenization valve

[0095] 2 valve housings

[0096] 21 input channel

[0097] 22 output channels

[0098] 23 Channel

[0099] 24 channel

[0100] 25 Mixing chamber

[0101] 26 Annular chamber

[0102] 3 valve bodies

[0103] 31 head

[0104] 311 frontal surface

[0105] 312 guide sleeve

[0106] 313 Sealing groove

[0107] 32 Transition area

[0108] 33 Valve area

[0109] 34, 34', 34" guide surface

[0110] 35, 35', 35“ guide surface

[0111] 36 Guide pin

[0112] 4 valve seat

[0113] 41 Pressure chamber inlet channel

[0114] 42 recording

[0115] 43, 43', 43" guide surface

[0116] 5 Actuator

[0117] 51 threads

[0118] 52 Lead recording

[0119] 6 guide housing

[0120] 61 Corpus

[0121] 62 Fixing screw

[0122] 63 recording

[0123] 7 Pressure chamber 8a, b Knife edge

[0124] 9 Expansion chamber

[0125] 10 grooves

[0126] 11 Nozzle

[0127] 12 dynamic low-pressure seal

[0128] 13 static high pressure seal

[0129] 14 Low pressure seal

[0130] 15 elastic unit

[0131] 100 homogenizing valve

[0132] 120 valve housings

[0133] 121 Low-pressure room

[0134] 122 output channel

[0135] 123 Output channel

[0136] 130 valve body

[0137] 131 Entrance

[0138] 132 neck

[0139] 133 Outer shell surface

[0140] 134 head

[0141] 135 conical area

[0142] 140 valve seat

[0143] 141 Conical section

[0144] 142 recording

[0145] 143 guide surface

[0146] 144 head

[0147] 145 channel

[0148] 160 guide housing

[0149] 161 Corpus

[0150] 162 Fixing screw

[0151] 163 Valve seat mount x, y direction

[0152] L Longitudinal axis

Claims

Claims Homogenizing valve (1) for a medium to be homogenized under system pressure, comprising, - a valve housing (2) with at least one inlet channel (21) and at least one outlet channel (22) for the medium, - a valve seat (4) arranged in the valve housing (2) with a receptacle (42) through which a valve body (3) extends movably in the direction of its longitudinal axis (L), - a pressure chamber (7) connected to the inlet channel (21) which is formed in the receptacle (42) of the valve seat (4) and / or the outer surface (33) of the valve body (3), - an actuating unit (5) operatively connected to the valve body (3), with which the axial position of the valve body (3) in the receptacle (42) can be adjusted, characterized in that - a flow resistance within the intake (42) can be controlled by moving the valve body (3) in the valve seat (4), - wherein, between the inner wall of the valve seat (4) forming the receptacle (42) and the valve body (3), a shear gap is formed on both sides of the pressure chamber (7) in the displacement direction of the valve body (3) by a knife edge (8a, 8b) and a wall region conically shaped relative to this edge, and downstream of the shear gap in the flow direction, an expansion chamber (9) connected to the outlet channel (22) is formed. Homogenizing valve (1) according to claim 1, characterized in that the circumferential length of a first knife edge (8a) near the actuating unit (5) is greater than the circumferential length of a second knife edge (8b) away from the actuating unit (5). Homogenizing valve (1) according to claim 1 or 2, characterized in that the knife edges (8a, 8b) are doubly conical when viewed in the direction of the longitudinal axis (L) of the valve body (3).Homogenizing valve (1 ) according to one of claims 1 to 3, characterized in that the knife edges (8a, 8b) on an outer surface of the valve body (3) are conical in the direction of displacement of the valve body (3). shaped areas of the receptacle (42) are positioned, in particular are molded or attached.

5. Homogenizing valve (1 ) according to one of claims 1 to 3, characterized in that the knife edges (8a, 8b) are positioned, in particular formed or attached, on an inner surface of the valve seat (4) between conically shaped areas of the outer surface of the valve body (3) in the displacement direction of the valve body (3).

6. Homogenizing valve (1 ) according to one of the preceding claims, characterized in that guide surfaces (34, 35, 43, 44) are provided on the inner surfaces of the valve seat (4) and the outer surfaces of the valve body (3), wherein grooves (10) connected to the respective expansion chamber (9) are provided on the guide surfaces (34, 35, 43, 44) of the valve seat (4) and / or the valve body (3).

7. Homogenizing valve (1 ) according to claim 6, characterized in that the grooves (10) extend linearly parallel to the direction of movement of the valve body (3).

8. Homogenizing valve (1 ) according to claim 6, characterized in that the grooves (10) extend in a curved direction to the direction of movement of the valve body (3).

9. Homogenizing valve (1 ) according to one of claims 6 to 8, characterized in that the grooves (10) are formed into the guide surfaces (33, 34) of the valve body (3).

10. Homogenizing valve (1 ) according to one of claims 6 to 8, characterized in that the grooves (10) are formed into the guide surfaces (43, 44) of the valve seat (4).

11. Homogenizing valve (1) according to one of claims 6 to 10, characterized in that the guide surfaces (34, 35, 43, 44) of the valve body (3) and of the valve seat (4) are conically shaped in the direction of the longitudinal axis (L) of the valve body (3).

12. Homogenizing valve (1) according to one of claims 6 to 10, characterized in that the guide surfaces (34, 35, 43, 44) of the valve body (3) and The valve seat (4) is cylindrical in the direction of the longitudinal axis (L) of the valve body (3). Homogenizing valve (1) according to one of the preceding claims, characterized in that channels (23, 24) connected to the outlet (22) are provided in the valve housing (2) downstream of the valve body (3). Homogenizing valve (1) according to claim 13, characterized in that the channels (23, 24) open into a mixing area of ​​the outlet (22) or a mixing chamber (25) located upstream of the outlet. Homogenizing valve (1) according to one of the preceding claims, characterized in that the diameter of the conically shaped receptacle (42) and of the part of the valve body (3) formed with a conically shaped outer surface (33) increases towards the actuating unit (5).Homogenizing valve (1) according to one of the preceding claims, characterized in that the valve seat (4) is fixedly installed in a receptacle of the valve housing (2) or is formed as a component of the valve housing (2). Homogenizing valve (1) according to one of the preceding claims, characterized in that an elastic assembly (15) is arranged between the actuating unit (5) and the valve body (3). Homogenizing valve (1) according to claim 17, characterized in that the elastic assembly (15) is designed as a spring assembly with at least two disc springs. Homogenizing valve (100) for a medium to be homogenized under system pressure, comprising. - a valve housing (120) with at least one outlet channel (122, 123) for the medium, - a valve seat (140) arranged in the valve housing (120) along a displacement axis (L) with an at least partially conically shaped receptacle (142) in which a valve body (130) fixed to the valve housing (120) with at least partially conically shaped outer shell surface (133) and an inlet channel (131) is mounted, - a pressure chamber (170) connected to the inlet channel (134), which is formed in the receptacle (42) of the valve seat (140) and / or the outer surface (133) of the valve body (130), - an actuating unit (150) in operative connection with the valve seat (140), characterized in that - a flow resistance within the intake (142) can be controlled by moving the valve body (130) in the valve seat (140), - wherein, between the inner wall of the valve seat (140) forming the intake (42) and the valve body (130), a shear gap is formed on both sides of the pressure chamber (170) in the direction of displacement of the valve body (130) by a knife edge (8a, 8b) and a wall area shaped conically opposite it, and downstream in the direction of flow an expansion chamber (9) connected to the outlet channel (22) is formed.