WO2014124676A1

WO2014124676A1 - Valve arrangement

Info

Publication number: WO2014124676A1
Application number: PCT/EP2013/053038
Authority: WO
Inventors: Mohammadali HONARPARDAZ; Jeroen Derkx; Arne TRANGÄRD
Original assignee: Abb Technology Ltd
Priority date: 2013-02-15
Filing date: 2013-02-15
Publication date: 2014-08-21

Abstract

A valve (12) for a pressurized medium. A nozzle (1) provides the pressurized medium into the valve. A coil (7) provides a magnetic flux, the magnetic flux giving rise to an electromagnetic force. A cantilever beam (2) is arranged outside the coil and comprises a magnetic mass element. In a first state the cantilever beam (2) contacts the outlet of the nozzle (1), thereby preventing a flow of the pressurized medium to enter the valve (12) and causing the valve to be closed. In a second state the cantilever beam (2) is distanced from the outlet of the nozzle (1), thereby allowing the flow of the pressurized medium to enter the valve (12) and causing the vale to be open. The cantilever beam (2) is movable between the first state and the second state by means of enabling/disabling the electromagnetic force to act on the magnetic mass element.

Description

VALVE ARRANGEMENT

TECHNICAL FIELD

Embodiments presented herein relate to a valve arrangement, and

particularly to a valve arrangement based on a cantilever beam. BACKGROUND

A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. In an open valve, fluid flows in a direction from higher pressure to lower pressure. The simplest valve is simply a freely hinged flap which drops to obstruct the fluid flow in one direction, but is pushed open by flow in the opposite direction. This is called a check valve, as it prevents or "checks" the flow in one direction.

Valves have many uses, including controlling water for Irrigation, industrial uses for controlling processes, residential uses such as on/off and pressure control to dish and clothes washers and taps in the home. Even aerosols have a tiny valve built in. Valves are also used in the military and transport applications.

Valves may be operated manually, either by a handle, lever, pedal or wheel. Valves may also be automatic, driven by changes in pressure, temperature, or flow. These changes may act upon a diaphragm or a piston which in turn activates the valve, examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers.

More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements. Electro-pneumatic positioners transfer an electric signal via pneumatics to a position of an actuated element. In general terms, a positioner comprises a current/pressure (I/P) convertor (pilot stage) and a purely pneumatic main stage valve. Offered on the market are valve arrangements that either use an analog pilot stage valve to create an analog (proportional) control of a main stage valve or valve arrangements where a discrete functioning pilot stage valve is arranged to actuate a discrete main stage valve (on-off, non-proportional).

Analog current/pressure (I/P) converters have the disadvantage of being rather complex in design, assembly and adjustment, leading to a rather high cost. Additionally, the pneumatic valves that are being controlled with these I/P converters demand a pilot stage with analog output. Hence, there is still a need for an improved valve arrangement.

SUMMARY

An object of embodiments herein is to provide an improved valve

arrangement.

According to a first aspect there is presented a valve for a pressurized medium. The valve comprises a nozzle arranged to provide the pressurized medium into the valve. The nozzle comprises an inlet for receiving the pressurized medium and an outlet for providing the pressurized medium into the valve. The valve further comprises a coil arranged to provide a magnetic flux. The magnetic flux gives rise to an electromagnetic force. The valve further comprises a cantilever beam arranged outside the coil. The cantilever beam comprises a magnetic mass element. The cantilever beam is movably arranged with respect to the outlet of the nozzle such that in a first state the cantilever beam contacts the outlet of the nozzle, preventing a flow of the pressurized medium to enter the valve, thereby causing the valve to be closed. The cantilever beam is further arranged with respect to the outlet of the nozzle such that in a second state the cantilever beam is distanced from the outlet of the nozzle, allowing the flow of the pressurized medium to enter the valve, thereby causing the valve to be open. The cantilever beam is arranged to be moved from one of the first state and the second state to the other of the first state and the second state upon the electromagnetic force acting on the magnetic mass element, and moved back from said other of the first state and the second state to said one of the first state and the second state upon termination of the electromagnetic force.

Advantageously, the valve can be used to create an (effectively) analog output in a discrete way. This would lead to a simpler and more cost effective design compared to the analog I/P converters that are in use today. The valve may be provided by modules. According to embodiments the valve further comprises a first module and a second module. The first module and the second module are detachable from each other. The first module comprises the nozzle and the cantilever beam. The second module comprises the coil. Advantageously, such a valve enables easy replacement, repair and/or maintenance of the valve.

According to a second aspect there is presented a method of manufacturing a valve arrangement. The method comprises providing a first module. The first module comprises a nozzle for providing the pressurized medium into the valve. The nozzle comprises an inlet la for receiving the pressurized medium and an outlet for providing the pressurized medium into the valve. The first module further comprises a cantilever beam, the cantilever beam comprising a magnetic mass element. The method further comprises providing a second module. The second module comprises a coil arranged to provide a magnetic flux. The magnetic flux gives rise to an electromagnetic force. The method further comprises arranging the first module and the second module with respect to each other such that the cantilever beam is arranged outside the coil, and wherein the cantilever beam is movably arranged with respect to the outlet of the nozzle such that in a first state the cantilever beam contacts the outlet of the nozzle, preventing a flow of the pressurized medium to enter the valve, thereby causing the valve to be closed, and in a second state the cantilever beam is distanced from the outlet lb of the nozzle, allowing the flow of the pressurized medium to enter the valve, thereby causing the vale to be open. The cantilever beam is arranged to be moved from one of the first state and the second state to the other of the first state and the second state upon the electromagnetic force acting on the magnetic mass element, and moved back from said other of the first state and the second state to said one of the first state and the second state upon termination of the electromagnetic force.

According to a third aspect there is presented a method for controlling a valve arrangement for a pressurized medium. The method comprises receiving the pressurized medium at an inlet of a nozzle and providing the pressurized medium into the valve at an outlet of the nozzle. The method further comprises providing a magnetic flux by a coil, the magnetic flux giving rise to an electromagnetic force. The method further comprises controlling a cantilever beam between a first state and a second state by means of the electromagnetic force. The cantilever beam comprises a magnetic mass element and is arranged outside the coil and movably arranged with respect to the outlet of the nozzle such that in a first state the cantilever beam contacts the outlet of the nozzle, preventing a flow of the pressurized medium to enter the valve, thereby causing the valve to be closed, and in a second state the cantilever beam is distanced from the outlet of the nozzle, allowing the flow of the pressurized medium to enter the valve, thereby causing the valve to be open. The cantilever beam is controlled by being moved from one of the first state and the second state to the other of the first state and the second state upon the electromagnetic force acting on the magnetic mass element, and moved back from said other of the first state and the second state to said one of the first state and the second state upon termination of the electromagnetic force.

It is to be noted that any feature of the first aspect may be applied to the second aspect and the third aspect, wherever appropriate. Likewise, any advantage of the first aspect may equally apply to the second aspect, and/or the third aspect, respectively, and vice versa. Other objectives, features and advantages of the enclosed embodiments will be apparent from the following detailed disclosure, from the attached dependent claims as well as from the drawings.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the element, apparatus, component, means, step, etc." are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated. BRIEF DESCRIPTION OF THE DRAWINGS

The invention is now described, by way of example, with reference to the accompanying drawings, in which:

Figs l 2, 3 and 4 are schematic views of parts of a valve arrangement according to embodiments; Fig 5 is a schematic view of a valve arrangement according to an

embodiment; and

Figs 6 and 7 are flowcharts of methods according to embodiments. DETAILED DESCRIPTION

The invention will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout the description.

The embodiments disclosed herein relate to a simple, but effective, type of on-off valve arrangement according to a first aspect. The valve arrangement is inter alia suitable for regulating a flow of a gaseous media (e.g. air). The embodiments disclosed herein further relate to a method of manufacturing a valve arrangement according to the first aspect.

Fig 5 is a schematic view of a valve arrangement 12 for a pressurized medium according to an embodiment. The valve arrangement 12 enables a flow of a fluid to controllably pass through a valve. Figs 1 2, 3 and 4 illustrate parts of the valve arrangement 12. Figs 1, 3 and 4 illustrate parts of the valve arrangement 12 in a first state and Fig 2 illustrates parts of the valve arrangement 12 in a second state. The valve arrangement 12 comprises a nozzle 1. In general terms the valve is supplied with a pressurized medium, of which the flow is to be controlled, at the nozzle 1. The nozzle 1 is thereby arranged to providing the pressurized medium into the valve. The nozzle 1 comprises an inlet la for receiving the pressurized medium. The nozzle 1 further comprises an outlet lb for providing the pressurized medium into the valve. Figure 7 discloses a method for controlling a valve arrangement 12 for a pressurized medium. The method comprises, in a step S11, receiving the pressurized medium at the inlet la of the nozzle 1 and providing the pressurized medium into the valve at the outlet lb of the nozzle 2. However, as the skilled person understands the direction of flow of the pressurized medium through the valve generally depends on the pressure difference between the pressure of the pressurized medium in the valve and the pressure of the pressurized medium at the inlet la. Hence, although the herein presented embodiments are disclosed in the context of the pressurized medium flowing in a direction from the inlet la towards the outlet lb, the herein presented embodiments are equally applicable in the context of the pressurized medium flowing in a direction from the outlet lb towards the inlet la.

The valve arrangement 12 further comprises a coil 7. As schematically illustrated in Figs 1-5 the coil 7 has a number of windings 8. The coil 7 is arranged to provide a magnetic flux. Hence, the method for controlling a valve arrangement 12 for a pressurized medium comprises, in a step S12, providing the magnetic flux by the coil 2. The magnetic flux gives rise to an electromagnetic force. The coil 7 is attachable to a current source 13. The coil 7 may therefore comprise a first terminal 9a and a second terminal 9b. The first terminal 9a and the second terminal 9b are connectable to an electric current source 13. Thereby, the coil 7 may be arranged to provide the magnetic flux upon being provided with an electric current by the electric current source 13. Hence the coil 7 may act as an actuator of an

electromagnet.

The valve arrangement 12 further comprises a cantilever beam 2. According to the orientation in Fig 1 the cantilever beam 2 is provided above the coil 7. In general terms, the cantilever beam 2 is arranged outside the coil 7. The cantilever beam 2 is further provided between the coil 7 and the nozzle 1. The method for controlling a valve arrangement 12 for a pressurized medium comprises, in step S13, controlling the cantilever beam 2 between a first state and a second state by means of the electromagnetic force.

The cantilever beam 2 comprises a magnetic mass element 4. The cantilever beam 2 may comprise a ferro/ferrimagnetic core. The magnetic mass element 4 may thus form the ferro/ferrimagnetic core. According to one embodiment the magnetic mass element 4 and the cantilever beam 2 thus forms an integral structure. This may provide a simple and compact design of the cantilever beam 2. Alternatively, the cantilever beam 2 may comprise an external magnetic mass element 4. The cantilever beam 2 comprises an external magnetic mass element 4 in a case the cantilever beam 2 is made from a non- ferro/ferromagnetic material. The magnetic mass element 4 may be provided on a side of the cantilever beam 2 which faces away from the outlet lb of the nozzle 1. Further, the magnetic mass element 4 may be provided on an end portion of the cantilever beam 2 not being anchored.

In general terms, a cantilever is a construction element (such as a beam) anchored at only one end 3. The cantilever beam 2 is bendable between a first state and a second state. According to an embodiment the first state is an idle state where the cantilever beam 2 is straight, and the second state is a working state where the cantilever beam 2 is bent. Thus, in the idle state where the cantilever beam 2 is straight the cantilever beam 2 may carry the weight of the ferromagnetic mass element 4.

The ferromagnetic mass element 4 may thus be said to be pre-loaded by the cantilever beam 2. In the first state the cantilever beam 2 is in contact with the nozzle 1 and hence the valve is closed. Apart from pre-loading and closing the nozzle 1, the cantilever beam 2 also serves as a (approximately) linear guide. In this way friction losses may be reduced, minimized, or even avoided. The cantilever beam 2 is arranged to be moved from one of the first state and the second state to the other of the first state and the second state upon the electromagnetic force acting on the magnetic mass element. The cantilever beam 2 is further arranged to be moved back from said other of the first state and the second state to said one of the first state and the second state upon termination of the electromagnetic force.

Thus, as illustrated in Figs 1, 3 and 4, the cantilever beam 2 is arranged with respect to the outlet ib of the nozzle 1 such that in the first state the cantilever beam 2 contacts the outlet ib of the nozzle 1. According to an embodiment the end portion of the cantilever beam 2 not being anchored contacts the outlet ib of the nozzle 1 in the idle state. The cantilever beam 2 is thus arranged to, in the first state, prevent a flow of the pressurized medium to enter the valve. The cantilever beam 2 thereby causes the valve to be closed.

Further, as illustrated in Fig 2, the cantilever beam 2 is arranged with respect to the outlet ib of the nozzle 1 such that in a second state the cantilever beam 2 is distanced from the outlet ib of the nozzle 1. Since the cantilever beam 2 is anchored at one end this means that the cantilever beam 2 in the second state may be bent away from the outlet lb of the nozzle 1. However, this will generally depend on the orientation of the anchoring. The cantilever beam 2 is arranged to, in the second state, allow the flow of the pressurized medium to enter the valve. The cantilever beam 2 thereby causes the valve to be open. According to one embodiment the first state is an idle state and the second state is a working state. According to another embodiment the first state is a working state and the second state is an idle state. The cantilever beam 2 is, by the electromagnetic force acting on the magnetic mass element 4, moved from the idle state to the working state. Similarly, the cantilever beam 2 is, upon termination of the electromagnetic force acting on the magnetic mass element 4, moved back towards the idle state.

The valve arrangement 12 may be provided as at least two modules 10a, 10b. The modules 10a, 10b are detachable from each other. The at least two modules 10a, 10b may thereby be independently replaceable. This may allow easy maintenance and/or repair of the valve arrangement 12. Further, it may allow different versions of the at least two modules 10a, 10b to be readily combined.

According to embodiments the valve arrangement 12 comprises a first module 10a and a second module 10b. The first module 10a and the second module 10b are detachable from each other. According to one embodiment the first module 10a houses the nozzle 1 and the cantilever beam 2 and the second module 10b houses the coil 7.

Fastening means 11a, 11b, 11c, nd may be provided in order to attach the modules to each other. Hence, according to an embodiment fastening means 11a, 11b, 11c, nd are arranged to attach the first module 10a to the second module 10b. The fastening means 11a, 11b, 11c, nd may be one from the group of screws, adhesive, welds, braces, or any combination thereof.

The coil 7 may be provided with a ferro/ferri-magnetic core. Particularly, according to an embodiment the valve arrangement 12 further comprises a magnetic core element 6. The magnetic core element 6 may thus be provided as a ferro/ferri-magnetic core. The magnetic core element 6 may comprise a plurality of laminated layers, thereby reducing eddy currents and thus improving its efficiency. The ferro/ferri-magnetic core may be provided in order to concentrate the magnetic flux that is generated when a current is passed through the coil 7. Therefore, a portion of the magnetic core element 6 is provided inside the coil 7 so as to concentrate the magnetic flux of the coil 7·

According to embodiments the magnetic core element 6 extends from a first inner end 6a to a second inner end 6b. The second inner end 6b faces away from the first inner end 6a. The second end is placed at a distance from the first inner end 6a. A gap 5 in the magnetic core element 6 is thereby formed in the void between the first inner end 6a and the second inner end 6b. The gap 5 is provided so as to interrupt the magnetic flux through the magnetic core element 6.

Further, according to an embodiment the magnetic core element 6 and the cantilever beam 2 are placed in relation to each other such that the shortest distance between the magnetic core element 6 and the magnetic mass element 4 is smaller than the width of the gap 5. For example, according to an embodiment the distance of the gap 5 is at most half of the length of the magnetic mass element 4. Additionally or alternatively, the magnetic mass element 4 may overlap both inner ends 6a, 6b of the magnetic core element 6 by about a quarter or more of its length. As noted above, the cantilever beam 2 is in the idle state arranged such that the end portion of the cantilever beam 2 not being anchored contacts the outlet lb of the nozzle 1. The gap 5 may therefore be located just underneath the nozzle 1, i.e. in a direction extending from the inlet la of the nozzle 1 through the outlet lb of the nozzle 1. This is illustrated in Figs 1 and 2. However, other relative positions of the gap 5, the nozzle 1 and the cantilever beam 2 are possible too. One reason may be to increase or decrease the stroke of one element relative to another, for example the stroke of the cantilever beam 2 in relation to the nozzle 1. For example, as illustrated in Fig 3, the nozzle 1 may be placed in relation to the cantilever beam 2 such that the nozzle 1 is closer to the anchored end 3 of the cantilever beam 2 than the magnetic mass element 4, thereby providing a smaller stroke than the relative positioning of these elements in Fig 1.

Further, as illustrated in Fig 4, the nozzle 1 may be placed in relation to the cantilever beam 2 such that the nozzle 1 is farther from the anchored end 3 of the cantilever beam 2 than the magnetic mass element 4, thereby providing a larger stroke than the relative positioning of these elements in Fig 1. One reason for enabling different relative positions of these elements is to compensate for non-linear behavior (such as force versus travel

characteristic) of the movement of the cantilever beam 2. Thus, the herein disclosed embodiments provide a flexible construction in terms of placing elements such as the gap 5, the nozzle 1 and the cantilever beam 2 in relation to each other, thereby also enabling full exploitation of the thus formed actuator in its best way and hence creating the needed travel of the cantilever beam 2 to fully open the nozzle 1.

Since the magnetic core element 6 is provided with a gap 5, the path of the magnetic flux through the magnetic core element 6 is interrupted. In the working state, i.e. when a current is applied to the coil 7, the magnetic flux will thus flow from the magnetic core element 6 into the magnetic mass element 4 via a first air-gap and then back into the magnetic core element 6 via a second air gap. As the skilled person understands, the distance spanned by the first gap and the second gap between the magnetic core element 6 and the magnetic mass element 4 generally depends on the magnitude of the electromagnetic force acting on the magnetic mass element 4. Hence, the electromagnetic force may be strong enough to attract the magnetic mass element 4 such that the magnetic mass element 4 contacts the magnetic core element 6.

As noted above, the valve arrangement 12 may be provided as at least two modules. According to embodiments the second module 10b further houses the magnetic core element 6.

According to a second aspect there is provided a method of manufacturing a valve arrangement 12 according to the first aspect. A flowchart for such a method is provided in Figure 6. The method comprises, in a step Si, providing a first module 10a. The first module 10a comprises a nozzle 1 and a cantilever beam 2. More particularly, the first module 10a firstly comprises a nozzle 1 for providing the pressurized medium into the valve. The nozzle 1 comprises an inlet la for receiving the pressurized medium and an outlet lb for providing the pressurized medium into the valve. The first module 10a secondly comprises a cantilever beam 2 comprising a magnetic mass element 4· The method further comprises, in a step S2, providing a second module 10b. The second module 10b houses a coil 7. More particularly, the second module 10b houses a coil 7 arranged to provide a magnetic flux, where the magnetic flux has an associated electromagnetic force.

The method further comprises, in a step S3, arranging the first module 10a and the second module 10b with respect to each other such that such that the cantilever beam 2 is arranged outside the coil 7, and wherein the cantilever beam 2 is movably arranged with respect to the outlet lb of the nozzle 1 such that in a first state the cantilever beam 2 contacts the outlet lb of the nozzle 1, preventing a flow of the pressurized medium to enter the valve, thereby causing the valve to be closed, and in a second state the cantilever beam 2 is distanced from the outlet lb of the nozzle 1, allowing the flow of the pressurized medium to enter the valve, thereby causing the valve to be open.

As disclosed above the second module 10b may further house a magnetic core element 6. Hence, the second module 10b provided in step S2 may further comprise also the magnetic core element 6.

As further disclosed above the first module 10a and the second module 10b may be fastened to each other by fastening means 11a, 11b, 11c, nd. According to an embodiment the method thus further comprises, in a step S4, fastening the first module 10a and the second module 10b to each other by fastening means 11a, 11b, 11c, nd.

Exemplary operation of the disclosed valve arrangements 12 will now be disclosed. The exemplary operation is disclosed in a context where the first state defines an idle state and where the second state defines a working state. When the magnetic core element 6 is energized (by an electric current being passed through the coil 7) a net electromagnetic force is thus produced on the magnetic mass element 4. The electromagnetic force thus will attract the magnetic mass element 4 towards the magnetic core element 6. When this electromagnetic force becomes higher than the pre-load (as provided by the cantilever beam 2, see above), the magnetic mass element 4 will move to a position in which it is attracted towards, or even in contact with, the magnetic core element 6. The cantilever beam 2 is by means of the electromagnetic force thereby caused to be bent and thus the valve to be opened. In the working state the cantilever beam 2 is thus bent towards the magnet core element. In this position, the electric current through the coil 7 can be reduced drastically to save energy whilst still keeping the magnetic mass element 4 in this position.

The valve is moved back to its initial closed position (i.e. to the idle state) by the coil 7 being de-energizing. The return motion of the magnetic mass element 4 is caused by the cantilever beam force.

The herein disclosed type of valve arrangement 12 can be used to control an air flow. More specifically the air flow may, by means of the herein disclosed type of valve arrangement 12, be controlled in a discrete way (on-off) so as to regulate a flow in a (pseudo) continuous way. An example of such control could be a Pulse Width Modulation (PWM) based control method. In PWM based control methods the valve is switched with a base frequency, and the duty cycle (i.e. the relative open time) of the valve is varied. Hence, the electric current source 13 applied to the terminals 9a, 9b of the coil 7 may be arranged to generate a current with a duty cycle based on PWM parameters. How to generate a current with a duty cycle based on PWM parameters is as such known in the art and a description thereof is therefore omitted. Other forms of control of the valve arrangement 12 (regarding opening/closing of the valve) are possible too.

The herein disclosed type of valve arrangement 12 and control method may readily be combined with a pre-restrictor. In this way it is possible to regulate a pressure. The herein disclosed type of valve arrangement 12 may thereby be used in applications that currently use analog I/P converters.

The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims. For example, any of the disclosed valve arrangements 12 may be used in any applications where a simple valve design and good flow controllability are needed. It is noted that any of the disclosed valve arrangements 12 enables a controllable opening behaviour, making it possible to regulate small flow volumes. Any of the disclosed valve arrangements 12 may be applied in digital positioners, such as models TZIDC and EDP300 from ABB Ltd. Also, any of the disclosed valve arrangements 12 may be applied in mechanical

positioners, such as in the AV-series from ABB Ltd. Any of the disclosed valve arrangements 12 may further be applied in other applications where a pressurized medium flow is to be regulated. One example is proportional pneumatic valves. Further examples include, but are not limited to (electro- pneumatic) positioners, controlling valves in chemical plants, controlling pressurized medium valves in power plants, as well as valves for controlling other elements that need actuation.

Claims

1. A valve arrangement (12) for a pressurized medium, comprising:

a nozzle (1) arranged to provide the pressurized medium into the valve , the nozzle (1) comprising an inlet (la) for receiving the pressurized medium and an outlet (lb) for providing the pressurized medium into the valve;

a coil (7) arranged to provide a magnetic flux, the magnetic flux giving rise to an electromagnetic force; and

a cantilever beam (2) arranged outside the coil (7), the cantilever beam (2) comprising a magnetic mass element (4),

wherein the cantilever beam (2) is movably arranged with respect to the outlet (lb) of the nozzle (1) such that

in a first state the cantilever beam (2) contacts the outlet (lb) of the nozzle (1), preventing a flow of the pressurized medium to enter the valve, thereby causing the valve to be closed, and

in a second state the cantilever beam (2) is distanced from the outlet (lb) of the nozzle (1), allowing the flow of the pressurized medium to enter the valve, thereby causing the valve to be open; and

wherein the cantilever beam (2) is arranged to be moved from one of the first state and the second state to the other of the first state and the second state upon the electromagnetic force acting on the magnetic mass element (4), and moved back from said other of the first state and the second state to said one of the first state and the second state upon termination of the electromagnetic force.

2. The valve arrangement (12) according to claim 1, wherein the first state is an idle state, and wherein the second state is a working state, and wherein the cantilever beam (2) is, by the electromagnetic force acting on the magnetic mass element (4), moved from the idle state to the working state.

3. The valve arrangement (12) according to claim 1, wherein the first state is a working state, and wherein the second state is an idle state, and wherein the cantilever beam (2) is, by the electromagnetic force acting on the magnetic mass element (4), moved from the idle state to the working state.

4. The valve arrangement (12) according to any one of the preceding claims, wherein the coil (7) further comprises a first terminal (9a) and a second terminal (9b), and wherein the first terminal (9a) and the second terminal (9b) are connectable to an electric current source (13), and wherein the coil (7) is arranged to provide the magnetic flux upon being provided with an electric current by the electric current source (13).

5. The valve arrangement (12) according to any one of the preceding claims, further comprising a first module (10a) and a second module (10b), the first module 10a and the second module (10b) being detachable from each other, the first module (10a) housing the nozzle (1) and the cantilever beam (2), the second module (10b) housing the coil (7).

6. The valve arrangement (12) according to claim 5, further comprising fastening means (11a, 11b, 11c, nd) arranged to attach the first module (10a) to the second module (10b).

7. The valve arrangement (12) according to any one of the preceding claims, further comprising a magnetic core element (6), a portion of the magnetic core element (6) being provided inside the coil (7) so as to concentrate the magnetic flux of the coil (7).

8. The valve arrangement (12) according to claim 7, wherein the magnetic core element (6) extends from a first inner end (6a) to a second inner end

(6b), the second inner end (6b) facing away from the first inner end 6a and being placed at a distance from the first inner end 6a such that a gap (5) in the magnetic core element (6) is formed between the first inner end (6a) and the second inner end (6b) so as to interrupt the magnetic flux through the magnetic core element (6).

9. The valve arrangement (12) according to claim 8, wherein the magnetic core element (6) and the cantilever beam (2) are placed in relation to each other such that the shortest distance between the magnetic core element (6) and the magnetic mass element (4) is smaller than the width of the gap (5).

10. The valve arrangement 12 according to any one of claims 7 to 9 when depending on claim 5 or 6, wherein the second module (10b) further houses the magnetic core element (6).

11. The valve arrangement (12) according to any one of the preceding claims, wherein the cantilever beam (2) comprises a ferro/ferrimagnetic core, the ferro/ferrimagnetic core forming the magnetic mass element (4).

12. The valve arrangement 12 according to any one of claims 1 to 10, wherein the cantilever beam (2) is made from a non- ferro/ferromagnetic material.

13. A method of manufacturing a valve arrangement (12), the method comprising:

providing (Si) a first module (10a), the first module 10a housing a nozzle (1) for providing the pressurized medium into the valve, the nozzle (1) comprising an inlet (la) for receiving the pressurized medium and an outlet (lb) for providing the pressurized medium into the valve, and a cantilever beam (2) comprising a magnetic mass element (4);

providing (S2) a second module (10b), the second module (10b) housing a coil (7) arranged to provide a magnetic flux, the magnetic flux giving rise to an electromagnetic force; and

arranging (S3) the first module (10a) and the second module (10b) with respect to each other such that the cantilever beam (2) is arranged outside the coil (7), and wherein the cantilever beam (2) is movably arranged with respect to the outlet (lb) of the nozzle (1) such that

wherein the cantilever beam (2) is arranged to be moved from one of the first state and the second state to the other of the first state and the second l8 state upon the electromagnetic force acting on the magnetic mass element (4), and moved back from said other of the first state and the second state to said one of the first state and the second state upon termination of the electromagnetic force.

14. The method according to claim 13, wherein the second module (10b) further houses a magnetic core element (6).

15. The method according to claim 13 or 14, further comprising:

fastening (S4) the first module (10a) and the second module (10b) to each other by fastening means (11a, 11b, 11c, nd).

16. A method for controlling a valve arrangement (12) for a pressurized medium, comprising:

receiving (S11) the pressurized medium at an inlet (la) of a nozzle (1) and providing the pressurized medium into the valve at an outlet (lb) of the nozzle (2);

providing (S12) a magnetic flux by a coil (2), the magnetic flux giving rise to an electromagnetic force; and

controlling (S13) a cantilever beam (2) between a first state and a second state by means of the electromagnetic force, the cantilever beam (2) comprising a magnetic mass element (4) and being arranged outside the coil (7) and movably arranged with respect to the outlet (lb) of the nozzle (1) such that

in a second state the cantilever beam (2) is distanced from the outlet (ib) of the nozzle (1), allowing the flow of the pressurized medium to enter the valve, thereby causing the valve to be open; and

wherein the cantilever beam (2) is controlled by being moved from one of the first state and the second state to the other of the first state and the second state upon the electromagnetic force acting on the magnetic mass element (4), and moved back from said other of the first state and the second state to said one of the first state and the second state upon termination of the electromagnetic force.