Method for mounting a valve and a valve

Abstract

The present disclosure relates to a method for assembling a valve (1) with a housing (2), a valve seat (3), a valve body (4) and a solenoid (5), in which the following process steps are carried out in the following order: • Pressing the valve seat (3) into the housing (2) in the direction of the valve body (4) arranged in the housing (2), in particular by means of a preferably hydraulic press, while on the one hand a hydraulic fluid (7) is continuously supplied to a valve chamber (6) forming between the valve seat (3) and the valve body (4), and on the other hand the lifting magnet (5) provided to generate a force (F) on the valve body (4) in the direction of the valve seat (3) is acted upon with an electric current, • Termination of the pressing of the valve seat (3) into the housing (2) when a certain pressure (bP) of the hydraulic fluid (7) is reached inside the valve chamber (6). Furthermore, the present disclosure relates to a valve (1) in which a press connection (14) is formed between a valve seat (3) and a housing (2) of the valve (1) for simplified assembly.

Description

[0001] The present invention relates to a method for assembling a valve and a valve according to the preamble of claim 9, in particular a valve, comprising a housing, a valve seat, a valve body and a solenoid, wherein the valve body is arranged in the housing and a valve chamber is formed between the valve body and the valve seat which is at least partially received by the housing, and wherein the solenoid is configured to exert a force on the valve body in the direction of the valve seat. Background of the invention

[0002] Valves of the aforementioned type are preferably used to limit system pressure and are, for example, designed as so-called proportional pressure relief valves. In known valves, the valve seat is screwed into an internal thread of the housing via an external thread. A lock nut is provided to secure the relative position between the valve seat and the housing. In a method for mounting such a valve, the valve seat is screwed into the housing and secured with the lock nut at the desired relative position between the valve seat and the housing.

[0003] Such a connection between the valve seat and the housing is complex in design and manufacturing, and therefore associated with correspondingly high costs. Furthermore, this connection leads to difficult valve installation. Brief description of the invention

[0004] The present invention is therefore based on the objective of providing a method for assembling a valve and a valve itself, by means of which the problems of the prior art are reduced or eliminated. In particular, the method for assembling the valve should be simplified and possible in a particularly small number of steps, and especially the valve should be easy to assemble in a few steps.

[0005] This problem is initially solved by a method for assembling a valve according to claim 1.

[0006] Further advantageous embodiments are the subject of the dependent claims.

[0007] More precisely, the task is solved by a method for assembling a valve with a housing, a valve seat, a valve body and a solenoid, in which the following process steps are carried out in the following order: • Pressing the valve seat into the housing in the direction of the valve body arranged in the housing, in particular by means of a preferably hydraulic press, while on the one hand a hydraulic fluid is continuously supplied to a valve chamber forming between the valve seat and the valve body, and on the other hand the lifting magnet provided to generate a force on the valve body in the direction of the valve seat is acted upon with an electric current, • Ending the pressing of the valve seat into the housing when a certain pressure of the hydraulic fluid inside the valve chamber is reached.

[0008] Once the valve seat has been pressed into the housing, its target position is reached. During the pressing process, a force equilibrium is established on the valve body, at least in the area around this target position. A force from the solenoid acts on the valve body in the direction of the valve seat. Additionally, a fluid force due to the pressure of the hydraulic fluid in the valve chamber acts on the valve body in the opposite direction to the valve seat. During the pressing process, a gap forms between the valve body and the valve seat, through which the hydraulic fluid flows. The smaller the gap, the greater the pressure of the hydraulic fluid in the valve chamber. Therefore, the pressure in the valve chamber increases during the pressing process.The described method achieves the target position of the valve seat depending on the specified, desired pressure of the hydraulic fluid within the valve chamber and the amount of electric current applied to the solenoid. During subsequent operation of the valve, the pressure in the valve chamber is then limited by the set amount of electric current, specifically to the defined pressure at the corresponding, known current. One could also say that the valve is calibrated simultaneously with the installation of the valve seat. This eliminates a step in the assembly process, namely the calibration that is usually required after the valve seat is installed on conventional valves. This calibration addresses component tolerances, among other things.The tolerances of the housing, valve body, valve seat, and / or solenoid are compensated for so that, despite these component tolerances, the specified pressure is achieved with the known amount of current applied to the solenoid, precisely through the appropriately adjusted target position of the valve seat. Besides the aforementioned hydraulic press, other types, such as electric presses, could also be used. Theoretically, devices other than presses are also conceivable for generating the pressing force.

[0009] Preferably, during the pressing of the valve seat into the housing, the hydraulic fluid is drained from the valve chamber and from the housing via a discharge channel formed in the housing, in particular towards a tank.

[0010] Thus, during the pressing-in process, similar flow conditions prevail within the valve as during its operation, thereby improving calibration accuracy. During valve operation, the hydraulic fluid also flows out of the valve chamber and the housing via the discharge channel.

[0011] Preferably, the solenoid is subjected to a substantially constant high electric current, preferably of 350mA to 450mA, in particular of 400mA, during the pressing of the valve seat into the housing.

[0012] A substantially constant high electrical current means that the desired current tolerance is ±5%. Applying this consistently high current allows the valve seat pressing process to be stopped with particular precision when the hydraulic fluid pressure within the valve chamber is reached, because the pressure within the valve chamber increases in a controlled manner during the pressing process. The solenoid is preferably designed as a proportional solenoid, in which the force exerted by the solenoid remains substantially constant over a wide operating range, particularly over a wide stroke range of the solenoid's plunger.

[0013] It can be advantageous if the specific pressure of the hydraulic fluid within the valve chamber, at which the pressing of the valve seat into the housing is completed, has a value between 15 bar and 25 bar, preferably between 18 bar and 22 bar, and particularly between 20 bar. Then the valve can advantageously be used in corresponding applications, e.g., in hydraulic systems for pressure limitation.

[0014] Preferably, during the pressing of the valve seat into the housing, a force is exerted on the plunger in a direction opposite to the valve seat by means of a spring arranged between the plunger of the solenoid and the housing.

[0015] The spring, like the fluid force due to the pressure of the hydraulic fluid, acts against the force applied to the valve body by the solenoid. One could also say that the force of the solenoid is reduced by the spring. Thus, the spring achieves a desired force profile depending on the stroke of the solenoid, namely the corresponding position of the solenoid's plunger. When using a proportional solenoid, the spring can create an increase in the force exerted on the valve body by the solenoid and the spring as the plunger retracts into the solenoid. The spring is preferably designed as a compression spring. The spring is preferably designed as a helical spring.

[0016] In a preferred embodiment, the hydraulic fluid is supplied to the valve chamber by means of a pump, and to determine the specific pressure of the hydraulic fluid, a pressure sensor measures the pressure of the hydraulic fluid downstream of the pump within the valve chamber. Thus, the supply of the hydraulic fluid to the valve chamber and the measurement of the pressure can be achieved with particularly simple means and therefore correspondingly low costs. The pressure can also be measured outside the valve chamber using the pressure sensor, as long as it is ensured that the pressure losses occurring when flowing through the flow channels formed between the pressure sensor and the valve chamber are negligibly small, so that the pressure at the pressure sensor corresponds sufficiently closely to the pressure in the valve chamber.

[0017] According to a particularly preferred embodiment, a flow control valve is arranged between the pump and the pressure sensor, by means of which a constant volume flow of the hydraulic fluid of preferably 0.7L / min to 0.9L / min, in particular 0.8L / min, is achieved towards the valve chamber.

[0018] By supplying a constant flow rate of hydraulic fluid to the valve chamber, the calibration accuracy is further improved. The target position of the valve seat can be achieved with exceptional precision. During subsequent valve operation, the relationship between the current applied to the solenoid and the pressure in the valve chamber, with appropriate hydraulic fluid supply, is then known with remarkable accuracy.

[0019] Preferably, after the pressing process is completed, the valve seat is frictionally connected to the housing by achieving a corresponding fit between the valve seat and the housing.

[0020] Thus, the number of steps required to carry out the process can be further reduced. If the frictional connection is strong enough, no further connection between the valve seat and the housing needs to be created after the pressing-in process is complete. Preferably, the valve seat and the housing are at different temperatures during the pressing-in process. In particular, the housing is at a higher temperature than the valve seat during the pressing-in process, so that a particularly strong frictional connection is achieved when the temperatures are subsequently the same.

[0021] Furthermore, the problem is solved by a valve according to claim 9.

[0022] One aspect of the invention essentially lies in the fact that a press connection is formed between the valve seat and the housing.

[0023] The frictional engagement of the press fit is preferably strong enough that no further connection between the valve seat and the housing is required after the pressing process is complete. No additional means are necessary to create the press fit. The pressing force simply needs to be reduced, preferably to zero, and the press fit is achieved. The valve seat and the housing, in particular a corresponding recess in the housing for the valve seat, can have particularly simple shapes for the press fit, which can be manufactured with minimal effort and correspondingly low costs. A specific fit is preferably formed between the valve seat and the corresponding recess in the housing to create the press fit. In the area of ​​the press fit, the valve seat is preferably hollow cylindrical. The corresponding recess in the housing is preferably cylindrical in the area of ​​the press fit.

[0024] Advantageously, the valve seat is connected to the housing by crimping parts of the valve seat or the housing to areas of the respective other element.

[0025] The crimping allows higher forces to act on the valve seat during operation without changing the position of the valve seat, especially its target position, relative to the housing.

[0026] In summary, such a valve, especially when mounted using the described method, is suitable for a wide range of applications. For example, the valve can be used as a pressure relief valve, particularly a proportional pressure relief valve, to limit system pressure. Brief description of the characters

[0027] Preferred embodiments are described in more detail below with reference to the accompanying figures. Fig. Figure 1 schematically shows a valve according to a preferred first embodiment in a side view in section during the procedure for assembling the valve. Fig. Figure 2 shows a diagram of the pressure profile of the hydraulic fluid within the valve chamber, shown schematically here, as a function of the insertion path of the valve seat into the housing. Fig. Figure 3 shows a diagram of the force curve on the valve body in the direction of the valve seat as a function of the stroke of the solenoid. Fig. Figure 4 schematically shows a valve according to a preferred second embodiment in a side view in section.

[0028] In the with the help of Fig. In the symbolic procedure for assembling a valve 1 with a housing 2, a valve seat 3, a valve body 4 and a solenoid 5, the following procedure steps are carried out in the following order: • Pressing the valve seat 3 into the housing 2 in the direction of the valve body 4 arranged in the housing 2, in particular by means of a preferably hydraulic press, while on the one hand a hydraulic fluid 7 is continuously supplied to a valve chamber 6 forming between the valve seat 3 and the valve body 4, and on the other hand the solenoid 5 provided to generate a force F on the valve body 4 in the direction of the valve seat 3 is supplied with an electric current, • Termination of pressing the valve seat 3 into the housing 2 when a certain pressure bP of the hydraulic fluid 7 is reached inside the valve chamber 6.

[0029] Instead of hydraulic fluid, another suitable medium can also be used. Valve 1 according to... Fig. 4 has a housing 2, a valve seat 3, a valve body 4 and a solenoid 5 and can also be assembled in such a way.

[0030] The valve body 4 is movably held in the housing 2 along a longitudinal valve axis L. During the pressing in of the valve seat 3, a pressing force eF acts on an outwardly facing end face of the valve seat 3. The pressing force eF acts in the direction of the longitudinal valve axis L. The valve seat 3 is designed as a rotationally symmetrical component with a through-channel through which the hydraulic fluid 7 is continuously supplied to the valve chamber 6. The longitudinal valve axis L is preferably located centrally in this through-channel. For supplying the hydraulic fluid 7 to the valve seat 3, a hydraulically sealed connection with a bore in the housing 2 and / or the hydraulic press is conceivable, for example. A hose could also be detachably connected to the valve seat, in particular screwed to the valve seat. Other variants and / or elements for supplying the hydraulic fluid 7 are conceivable.It is important that the movement of the valve seat 3 is not impaired by these elements. The valve body 4 has a preferably conical tip facing the valve seat 3, which is designed to seal the valve body 4 against the valve seat 3, in particular against a contact surface of the valve seat 3 facing the valve body 4, when the valve 1 is closed. The housing 2 is made of [material] as shown in the illustration. Fig. 1 and Fig. 4 multi-part versions.

[0031] During the pressing of the valve seat 3 into the housing 2, the hydraulic fluid 7 is discharged from the valve chamber 6 and from the housing 2 via a discharge channel 8 formed in the housing 2, in particular towards a tank. This ensures a continuous supply of the hydraulic fluid 7 without excessively high pressures developing in the valve chamber 6. During operation of the then-open valve 1, the hydraulic fluid 7 is also discharged from the valve chamber 6 and from the housing 2 via the discharge channel 8, so that similar conditions prevail during the pressing of the valve seat 3 into the housing 2 as during operation of the open valve 3.

[0032] Based on Fig. Section 2 describes the pressure profile P within the valve chamber 6 during the press-fitting process. During the press-fitting of the valve seat 3, the hydraulic fluid 7 initially flows through the valve 1 without significant pressure losses, resulting in a small press-fit path S of the valve seat 3 into the housing 2. As the press-fit path S increases and the gap between the valve seat 3 and the valve body 4 narrows, the pressure P within the valve chamber 6 rises, primarily due to increased flow losses through the gap. When the desired high pressure bP of the hydraulic fluid 7 within the valve chamber 6 is reached, the press-fitting process is terminated by reducing or removing the press-fit force eF. After the reduction or removal of the press-fit force eF, the supply of hydraulic fluid 7 to the valve chamber 6 is stopped.A specific pressure bP is assigned a specific insertion depth of the valve seat 3, whereby specific insertion depths may differ between identical valves 1 due to component tolerances, including those of the housing 2, the valve body 4, the valve seats 3, and / or the solenoids 5. This method ensures that, during operation, all identical valves 2 operate with the same amount of current energizing the respective solenoid 5, resulting in the same pressures P in the valve chamber 6 of the opened valve 1.

[0033] During the pressing of the valve seat 3 into the housing 2, the solenoid 5 is subjected to a substantially constant high electric current, preferably 350 mA to 450 mA, and particularly 400 mA. It would also be conceivable to subject the solenoid 5 to a substantially constant high electric voltage. However, a substantially constant electric current allows for a particularly constant force to be applied by the solenoid 5 to the valve body 4, as changes in force, e.g., due to temperature changes, are compensated for. Furthermore, the voltage and / or the current applied to the solenoid 5 could be varied.

[0034] The specific pressure bP of the hydraulic fluid 7 within the valve chamber 6, at which the pressing of the valve seat 3 into the housing 2 is terminated, has a value between 15 bar and 25 bar, preferably between 18 bar and 22 bar, and particularly between 20 bar. Other values ​​of the specific pressure bP of the hydraulic fluid 7 within the valve chamber 6, at which the pressing of the valve seat 3 into the housing 2 is terminated, are also conceivable, depending on the design of the valve 1. For example, significantly higher pressures with values ​​of several hundred bar are also conceivable, which can advantageously be achieved with the same high electrical currents in the solenoid 5 as in the range between 15 bar and 25 bar, precisely through appropriate design of the valve seat 3 and the valve body 4. The smaller the hydraulically permissible operating range of the valve 1 set in this way, the more precisely the pressure in the valve chamber 6 can be set during operation of the valve 1.

[0035] During the pressing of the valve seat 3 into the housing 2, a force is exerted on the plunger 9 in the opposite direction to the valve seat 3 by means of a spring 10 arranged between a plunger 9 of the solenoid 5 and the housing 2. A force can be transmitted from the solenoid 5 to the valve body 4 via the plunger 9. The spring 10 is designed as a compression spring and acts between corresponding areas of the housing 2 and a shoulder of the plunger 9. The solenoid 5, in particular a coil of the solenoid 5, is connected to the housing 2.

[0036] With the help of Fig. 3 now describes the course of the force F on the valve body 4 in the direction of the valve seat 3. Fig. Figure 3 shows the course of the force F as a function of a stroke H of the lifting magnet 5, where the in Fig. Figure 3 shows the force curve, which also takes the spring 10 into account. The pressing action begins at low values ​​of the force F on the valve body 4 near the Y-axis. At this point, the spring 10 is largely, and in particular completely, compressed. Near the Y-axis, the plunger 9 is extended far, and in particular completely, from the solenoid 5, especially its coil, towards the valve seat 3. When the pressure P inside the valve chamber 6 then increases due to the pressing action of the valve seat 3, the plunger 9 is pressed into the solenoid 5, especially its coil, thereby relaxing the spring 10. This causes the force F of the solenoid 5 on the valve body 4 towards the valve seat 3 to increase, less the spring force on the plunger 9. The force F continues to increase until a certain force bF on the valve body 4 towards the valve seat 3 is reached. The pressing process ends at this specific force bF.This specific force bF is in equilibrium with the force that, due to the specific pressure bP of the hydraulic fluid 7 within the valve chamber 6, acts on the valve body 4 away from the valve seat 3. When the solenoid 5 is pressed according to... Fig. Since the solenoid 3 is designed as a proportional solenoid, the force exerted by the solenoid 5 on the valve body 4 is essentially independent of the stroke H of the solenoid 5. This is symbolized by the section of the force curve parallel to the x-axis at the right end of the force curve. In this parallel section, no force from the spring 10 acts on the valve body 4; the spring 10 is already completely relaxed at this point. The increase in the force F curve on the valve body 4 towards the valve seat 3 is primarily achieved by the spring 10.

[0037] The hydraulic fluid 7 is supplied to the valve chamber 6 according to Fig. The hydraulic fluid 7 is supplied by means of a pump 11. To determine the specific pressure bP of the hydraulic fluid 7 within the valve chamber 6, a pressure P of the hydraulic fluid 7 downstream of the pump 11 is measured by means of a pressure sensor 12. The pump 11 is driven, for example, by a motor, in particular an electric motor. The hydraulic fluid 7 is drawn from, for example, a tank or reservoir by means of the pump 11.

[0038] A flow control valve 13 is arranged between the pump 11 and the pressure sensor 12. This valve ensures a constant flow rate of the hydraulic fluid 7, preferably 0.7 L / min to 0.9 L / min, and particularly 0.8 L / min, to the valve chamber 6. Other methods of supplying the hydraulic fluid to the valve chamber are conceivable. Preferably, a further pressure sensor 16 and a pressure relief valve 17 for the hydraulic fluid 7 are connected to an outlet of the pump 11 in addition to the flow control valve 13. The pressure relief valve 17 prevents overpressure by allowing hydraulic fluid 7 to be discharged via the pressure relief valve 17, for example, into the tank or reservoir. The further pressure sensor 16 serves in particular for controlling and / or regulating the pump 11.

[0039] After the pressing process is completed, the valve seat 3 is frictionally connected to the housing 2 by realizing a corresponding fit between the valve seat 3 and the housing 2.

[0040] After the pressing process is complete, the valve seat 3 can be connected to the housing 2 by crimping parts of the valve seat or housing to areas of the respective other element. Fig. Figure 1 shows the valve 1 after such flaring, whereby the pressing force eF and the force from the solenoid 5 continue to act during the flaring process, and hydraulic fluid 7 continues to be supplied to the valve chamber 6. However, it is also possible that the frictional connection is sufficient for a stable connection of the valve seat 3 with the housing 2 and that flaring can be omitted. Fig. Figure 4 shows a variant of valve 1 in which such crimping is not provided.

[0041] The in Fig. 1 and Fig. The valve 1 shown in Figure 4 comprises the housing 2, the valve seat 3, the valve body 4, and the solenoid 5. The valve body 4 is arranged in the housing 2. The valve chamber 6 is formed between the valve body 4 and the valve seat 3, which is at least partially enclosed by the housing 2. The solenoid 5 is designed to exert a force F on the valve body 4 in the direction of the valve seat 3. A press fit 14 is formed between the valve seat 3 and the housing 2. The valve seat 3 is designed according to Fig. 1 is sealed against the housing 2 by means of a seal, in particular an O-ring. According to Fig. In contrast, part 4 is an inner housing component, namely a so-called pole tube, sealed against an outer housing component by means of a seal, in particular an O-ring. The valve body 4 is movable along the longitudinal axis L of the valve relative to the housing 2. The valve body 4 is preferably rotationally symmetrical.

[0042] The valve seat 3 is connected to the housing 2 according to Fig. 1. Parts of the valve seat or housing 2 are connected to areas of the respective other element by a crimp 15. As already mentioned, the crimp 15 can be omitted if the press connection 14 is sufficiently stable, which is the case in Fig. Figure 4 shows that the crimp 15, if present, is in addition to the press connection 14. According to the illustration in Figure 4, the crimp 15 is, if present, in addition to the press connection 14. Fig. 1. The crimping 15 is realized as follows. The valve seat 3 has a preferably circumferential notch or groove. A shoulder area of ​​the housing 2 can be pressed into this notch or groove by crimping, subjecting it to plastic deformation. Once the crimping 15 is formed, the shoulder area of ​​the housing 2 is then locked in the notch or groove, namely, a positive fit is achieved between the notch or groove on the one hand and the shoulder area on the other.

[0043] The valve seat 3 according to Fig. 4 has a substantially cylindrical outer circumference without such a notch or groove. Reference symbol list 1 valve 2 cases 3 valve seat 4 valve bodies 5 lifting magnet 6 valve chamber 7 Hydraulic fluid 8 Drainage channel 9 pestles 10 springs 11 Pump 12 Pressure sensor 13 Flow control valve 14 Press connection 15 Crimping 16 Pressure sensor 17 Pressure relief valve for the hydraulic fluid 7 eF Press-in force F Force on the valve body 4 in the direction of the valve seat 3 bF exerts a specific force on the valve body 4 in the direction of the valve seat 3 bP specific pressure of the hydraulic fluid 7 within the valve chamber 6 P Pressure of the hydraulic fluid 7 inside the valve chamber 6 S Press-in path of the valve seat 3 into the housing 2 H Stroke of the lifting magnet 5 L Valve longitudinal axis

Claims

[1] Method for assembling a valve (1) with a housing (2), a valve seat (3), a valve body (4) and a solenoid (5) in which the following process steps are carried out in the following order: • Pressing the valve seat (3) into the housing (2) in the direction of the valve body (4) arranged in the housing (2), in particular by means of a preferably hydraulic press, while on the one hand a hydraulic fluid (7) is continuously supplied to a valve chamber (6) forming between the valve seat (3) and the valve body (4), and on the other hand the lifting magnet (5) provided to generate a force (F) on the valve body (4) in the direction of the valve seat (3) is acted upon with an electric current, • Termination of the pressing of the valve seat (3) into the housing (2) when a certain pressure (bP) of the hydraulic fluid (7) is reached inside the valve chamber (6). [2] Method according to claim 1, characterized by , that during the pressing of the valve seat (3) into the housing (2) the hydraulic fluid (7) is discharged from the valve chamber (6) and from the housing (2) via a discharge channel (8) formed in the housing (2), in particular towards a tank. [3] Method according to claim 1 or 2, characterized by , that the solenoid (5) is subjected to a substantially constant high electric current, preferably of 350mA to 450mA, in particular of 400mA, during the pressing of the valve seat (3) into the housing (2). [4] Method according to any of the preceding claims, characterized by , that the specified pressure (bP) of the hydraulic fluid (7) within the valve chamber (6), at which the pressing of the valve seat (3) into the housing (2) is completed, has a value between 15 bar and 25 bar, preferably between 18 bar and 22 bar, in particular between 20 bar. [5] Method according to any of the preceding claims, characterized by , that during the pressing of the valve seat (3) into the housing (2) a force is exerted on the plunger (9) in a direction opposite to the valve seat (3) by means of a spring (10) arranged between a plunger (9) of the solenoid (5) and the housing (2). [6] Method according to any of the preceding claims, characterized by , that the hydraulic fluid (7) is supplied to the valve chamber (6) by means of a pump (11) and, in order to detect the specific pressure (bP) of the hydraulic fluid (7) within the valve chamber (6), a pressure (P) of the hydraulic fluid (7) downstream of the pump (11) is measured by means of a pressure sensor (12). [7] Method according to claim 6, characterized by, that a flow control valve (13) is arranged between the pump (11) and the pressure sensor (12), by means of which a constant volume flow of the hydraulic fluid (7) of preferably 0.7L / min to 0.9L / min, in particular of 0.8L / min, is realized towards the valve chamber (6). [8] Method according to any of the preceding claims, characterized by , that after the pressing process is completed, the valve seat (3) is frictionally connected to the housing (2) by realizing a corresponding fit between the valve seat (3) and the housing (2). [9] Valve (1), comprising a housing (2), a valve seat (3), a valve body (4) and a solenoid valve (5), wherein the valve body (4) is arranged in the housing (2) and a valve chamber (6) is formed between the valve body (4) and the valve seat (3) which is at least partially received by the housing (2), and wherein the solenoid valve (5) is configured to exert a force (F) on the valve body (4) in the direction of the valve seat (3), characterized by , that a press connection (14) is formed between the valve seat (3) and the housing (2). [10] Valve (1) according to claim 9, characterized by , that the valve seat (3) is connected to the housing (2) by a crimping (15) of parts of the valve seat or the housing (2) to areas of the respective other element.

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