EP3313775B1 - Filling system for filling of containers - Google Patents

Description

The invention relates to filling elements according to the preamble of claim 1 and to filling machines according to the preamble of claim 10.

Filling elements for controlled dispensing, for example for filling-level and / or volume and / or quantity-controlled dispensing, of liquid products or filling goods in packaging are known in numerous designs, these filling elements basically each having at least one liquid channel and opening at least one discharge opening for the filling material have at least one liquid valve arranged in this liquid channel, which is opened and closed in a controlled manner during filling. The liquid valve generally comprises a valve body which is at least partially arranged in the liquid channel and, when the filling material flows around it, interacts with a valve seat which is also provided in the liquid channel. The valve body bears against this when the liquid valve is closed and the valve body is spaced from it when the liquid valve is open, releasing at least one valve opening. In the case of a large number of known filling elements, when the liquid valve is opened and closed, the valve body, which is then provided, for example, on a valve tappet-like component likewise accommodated at least with a partial length in the liquid channel, is moved by an actuating device in a valve or stroke axis.

Such a filling element with a flow control valve and a check valve according to the preamble of claim 1 is known from the US 2013/0112719 A1 known.

The DE 10 2012 211 926 A1 describes a pressure-relieved proportional valve with a moving valve stamp which is sealed with bellows.

A filling element is also known ( DE 10 2013 106 927 A1 ), in which the liquid valve essentially consists of a valve body which is arranged in the filling element channel and flows around the filling material and which is not moved in the valve or stroke axis when the liquid valve is opened and closed, and consists of a valve element designed as a casing tube which comprises the Valve body encloses on a partial length at a distance and on which a valve seat cooperating with the valve body and formed by a sealing membrane is provided. To open and close the liquid valve, the valve body, which is axially guided on a housing section of the filling element, is inserted into the valve and stroke axis between a flow position in which the valve seat bears against the valve body to close the liquid valve, and a position moves, in which the valve seat for opening the liquid valve and for releasing a valve opening formed between the valve seat and the valve body is spaced from the valve body. The movement of the valve element takes place, for example, pneumatically by supplying control chambers with compressed air, which are formed between an inner surface of the valve body and an outer surface of a housing section of the filling element. The first disadvantage here is that additional pneumatics are required for opening and closing the liquid valve, such as a compressed air source, pneumatic lines, electropneumatic control valves, etc. It is particularly disadvantageous in that due to the DE 10 2013 106 927 A1 Above all, the filling valve presented is also that a not inconsiderable closing force must be applied for closing and keeping the liquid valve closed, particularly in the case of a filling material under filling pressure, so that a closing force resulting from the pressure of the filling material and acting in the sense of opening the liquid valve Force to compensate. This would be particularly disadvantageous if the control of the liquid valve is to be carried out by an electromagnetic actuator, since the actuator would then have to be controlled with a high continuous current for closing and keeping closed.

The same applies analogously if the liquid valve has to be opened against a force generated by the pressure of the filling material.

If filling elements are each formed with a flow control valve which controls the volume flow of the filling material during the filling phase, these valves could in principle also take over the complete opening and complete closing of the filling element. When the flow control valve is closed, the filling pressure is then present on the inside of the flow control valve facing away from the discharge opening and the ambient pressure on the outside of the closed flow control valve facing the discharge opening. It is at least sensible to design the flow control valve so that it is kept alone or supported by the filling pressure in the closed state, but with the disadvantage that the force required to open the flow control valve results from the filling pressure and the "opening cross-section" of the flow control valve , which means that usually considerable forces would be required to open the flow control valve at the start of a filling process. Such designs of a filling element thus require a massive structure including the flow control valve and considerable driving forces for opening this valve, which ultimately has an adverse effect on the properties of the valve in question as a flow control valve.

The object of the invention is to show filling elements which avoid this disadvantage and advantageously enable the volume flow of the filling material to be controlled or regulated during the filling phase, specifically with reduced control forces for opening, adjusting and closing the respective flow control valve of a filling element according to the invention. These filling elements are preferably designed such that the control forces for opening, adjusting and closing the respective flow control valve of a filling element according to the invention are not influenced by the effect of the pressure of the filling material.

To solve this problem, filling elements are designed according to claim 1. A filling machine is the subject of claim 10.

In the case of the filling element according to the invention, the controlled delivery of the filling material into the respective container takes place by means of a liquid valve arrangement which, in series and in the direction of flow of the filling material, successively has at least one flow control valve and one shut-off valve, the latter preferably being designed as a pure shut-off valve and only between an open and is controllable in a closed state. In the present case, the shut-off valve can also be generally understood as a liquid valve, by means of which, in particular in the filling phase, there is no regulation of the volume flow or the flow rate or the quantity or volume delivery of the filling material, but essentially the opening and blocking of the delivery of the filling material. With the flow control valve, the size of the filling material flow or the volume flow of the filling material and thus the filling speed during filling can be regulated and / or controlled without problems between a minimum value and a maximum value. The actual opening and closing of the filling element takes place via the separate shut-off valve or liquid valve. Since the separate shut-off valve is provided for opening and closing the filling element, the same or prevails on both sides of this valve even when the flow control valve is closed essentially the same pressure. The force required to close or open the flow control valve is no longer dependent on the pressure of the medium. In particular, when the flow control valve is controlled by an electric actuator and especially by an electromagnetic drive, only a greatly reduced power requirement is required to keep the flow control valve closed and closed and / or to keep this valve open and open. This is very important with regard to the design of the actuator and the electrical supply of this drive, especially also in the case of filling systems or rotating machines of the rotating type, in which the filling elements are provided on a rotor rotating around a vertical machine axis, on which only a limited electrical power is available Is available and in particular the dissipation of waste heat from an actuator to be driven with high power is extremely problematic.

For the purposes of the invention, "containers" are in particular cans, bottles, tubes, pourches, each made of metal, glass and / or plastic, but also other packaging materials which are suitable for filling liquid or viscous products.

Free jet filling is understood in the sense of the invention to mean a method in which the liquid filling material flows into the container to be filled in a free filling jet, the filling material jet not being influenced by additional elements such as swirl bodies, gas barriers etc. on its way into the container. The container mouth or opening can lie in the sealing position on the filler element, or alternatively can also be spaced from it.

For the purposes of the invention, the expression “essentially” or “approximately” means deviations from the respectively exact value by +/- 10%, preferably by +/- 5% and / or deviations in the form of changes which are insignificant for the function.

Further developments, advantages and possible uses of the invention also result from the following description of exemplary embodiments and from the figures.

Fig. 1 und 2

in vereinfachter Darstellung und im Schnitt jeweils zwei Füllelemente gemäß der Erfindung im geschlossenen Zustand (Fig. 1) und im geöffneten Zustand (Fig. 2);

Fig. 3 und 4

in vereinfachter Darstellung und im Schnitt eine weitere Ausführungsform des erfindungsgemäßen Füllelementes im geschlossenen Zustand (Fig. 3) und im geöffneten Zustand (Fig. 4);

Fig. 5 und 6

in Darstellungen ähnlich den Fig. 1 und 2 eine weitere Ausführungsform des erfindungsgemäßen Füllelementes;

Fig. 7 und 8

in Darstellungen ähnlich den Fig. 3 und 4 eine weitere Ausführungsform des erfindungsgemäßen Füllelementes.

The invention is explained in more detail below with reference to the figures using exemplary embodiments. Show it:

1 and 2

in a simplified representation and in section two filling elements according to the invention in the closed state ( Fig. 1 ) and when open ( Fig. 2 );

3 and 4

in a simplified representation and in section, a further embodiment of the filling element according to the invention in the closed state ( Fig. 3 ) and when open ( Fig. 4 );

5 and 6

in representations similar to Fig. 1 and 2 a further embodiment of the filling element according to the invention;

7 and 8

in representations similar to 3 and 4 a further embodiment of the filling element according to the invention.

The Fig. 1 and 2 each show two identically designed filling elements 1 for the controlled filling of containers 2 with a liquid product or filling material. The containers 2 are shown by way of example as cans, but can also be another packaging material suitable for filling liquid products.

In use, the two filling elements 1 are part of a filling system which preferably has further filling elements 1 of the same type. For example, the filling elements 1 are part of a rotating machine of the rotating type, in which they are provided in the manner known to the person skilled in the art together with a large number of similar filling elements 1 on the circumference of a rotor which can be driven around a vertical machine axis. The filling elements 1 are designed, for example, for free-jet filling of the containers 2, but are fundamentally also suitable for other filling methods, in particular with appropriate adaptation.

In each filling element 1, a liquid channel 3 is formed, which in the embodiment shown is connected with its upper end or with a connection 3.1 there to a filling tank which is not shown and which provides the filling material. On the underside of each filling element 1, the liquid channel 3 forms a dispensing opening 4, through which the filling material flows to the container 2 arranged under the filling element 1 during filling. In the liquid channel 3, in the direction of flow (arrow A) in which the filling material flows through the liquid channel 3 during filling, between the connection 3.1 and the discharge opening 4 there is a flow valve 5 which controls in particular the volume flow or the flow of the liquid filling material during filling and then between this valve and the discharge opening 4, a check valve 6 is provided.

In the embodiment shown, the flow control valve 5 comprises a valve body 7, which is arranged in the liquid channel 3 coaxially with a valve or stroke axis FA corresponding to a filling element axis and which cooperates with a valve seat 8 which is ring-shaped or formed by an annular body in the embodiment shown, in such a way that at closed flow control valve, the valve body 7 and the valve seat 8 bear against each other ( Fig. 1 ) and are spaced apart from one another when the flow control valve 5 is open ( Fig. 2 ). With its opening, the valve seat 8 forms part of the liquid channel 3.

In the case of the filling elements 1, the respective valve body 7 is fixed, that is to say axially immovable, in the liquid channel 3, while the valve seat 8 can be moved axially controlled and / or regulated in the direction of the valve or stroke axis FA relative to the valve body 7 (double arrow B), specifically via an actuator 9 which is assigned to each filler element 1 and which, in the embodiment shown, is designed as an electromagnetic actuator and / or linear actuator and to which the valve seat 8 is connected in terms of drive via a web-like driver 10. The controlled opening of the flow control valve 5 takes place in the case of the filling elements 1 in each case by lifting the valve seat 8 against the flow direction A.

The respective actuator 9 includes a first drive element in the form of a stator 9.1, which has at least one stator winding and, in an axial direction parallel to the valve or stroke axis FA, a plurality of magnetic poles which interact via a magnetic gap with a second drive element in the form of a rotor 9.2, which is provided on the driver 10 and has at least one permanent magnet. The magnetic gap of the actuator 9 formed between the stator 9.1 and the rotor 9.2 is located to the side of the valve seat 8 and thus in any case outside the liquid channel 3.

In more detail, each filler 1 consists of one in the Fig. 1 and 2 Upper housing part 12, on which a tubular section 11 forming the connection 3.1 is also provided coaxially with the valve or lifting axis FA, and from a lower housing part 13, in which a partial length of the liquid channel 3 opening into the liquid valve 6 is formed and on which over Web 7.1 of the valve body 7 is held. The two housing parts 12 and 13, which are spaced apart from one another in the direction of the valve or stroke axis FA, are connected to one another by a plurality of connecting elements 14 which are designed as rods in the embodiment shown. On one of these rod-like connecting elements 14, the driver 10 is displaceably guided in an axial direction parallel to the valve or lifting axis FA. The stator 9.1 of the actuator is held on a circuit board 15 which extends between the housing parts 12 and 13 and is fastened to these housing parts.

The driver 10, which is axially movable on the rod-shaped connecting element 14, simultaneously forms an axial guide for the valve seat 8. It goes without saying that the driver 10 can preferably be guided on a plurality of rod-shaped connecting elements 14, in order to avoid undesired pivoting or turning of the driver 10 and to ensure an exact guidance of the valve seat 8 in the valve or stroke axis FA.

In order to enable the controlled movement of the valve seat 8 with the actuator 9 in the direction of the valve or lifting axis FA, the liquid channel 3 is in a section 3.2 between the connection 3.1 and the valve seat 8 within a flexible seal 16 and in a section 3.3 between the Valve seat 8 and the Housing part 13 formed within a flexible seal 17. In the embodiment shown, both seals are each formed by a bellows.

The two filling elements 1 form, for example, a structural unit in the form of a multiple filling element with two separate liquid channels 3 with a discharge opening 4 and with the liquid valve arrangement provided in the liquid channels 3, each of which consists of the flow control valve 5 and the check valve 6.

The respective filling element 1 is operated as follows, for example:
Before the start of a filling process, the shut-off valve 6 and the flow control valve 5 are closed. Since the liquid channel 3 is tightly blocked by the shut-off valve 6, a pressure equalization or essentially a pressure equalization occurs in the two sections 3.2 and 3.3 upstream or downstream of the flow control valve 5 even when the filling material is under a filling pressure and is supplied to the filling element 1 the filling phase is initiated, that is, for the introduction of the filling material into the container 2, the flow control valve 5 is first opened at least partially, namely by controlled lifting of the valve seat 8 from the valve body 7 with the actuator 9. Due to the existing pressure compensation in sections 3.2 and 3.3, this opening of the flow control valve 5 can take place with reduced force and thus with a reduced control current which actuates the actuator 9. A force resulting from the pressure of the filling material and holding the valve seat 8 in its closed position, which would roughly correspond to the opening cross section of the flow control valve 5 multiplied by the filling pressure of the filling material, need not be overcome when the flow control valve 5 is opened. Only after the flow control valve 5 has been opened is the shutoff valve 6 also opened, so that the liquid filling material can then flow into the container 2 via the discharge opening 4. During this filling phase, the volume flow of the filling material flowing into the container 2 is controlled and / or regulated by the flow control valve 5 actuated by the actuator 9, for example in the form that, at the beginning and / or at the end of the filling phase, the volume flow by reducing the opening cross section of the flow control valve 5 for a slow filling and / or remaining filling is reduced. At the end of the filling phase and the filling process, for example, the shutoff valve 6 is first and then the flow control valve 5 is closed, for example as a function of a signal from a sensor or measuring element determining the filling quantity and / or the filling weight and / or the filling height in the container 2, for example in the form of a flow meter, a weighing device, one in the container 2 reaching probe, etc. The flow control valve 5 is closed with the actuator 9 by moving the valve seat 8 onto the valve body 7, for example in a time-controlled manner.

Furthermore, the filling element 1 can also be operated such that the closing of this filling element, i.e. the filling phase is ended first by controlled and / or regulated closing of the flow control valve 5, e.g. by appropriate activation of the electric actuator 9 as a function of the signal of the sensor or measuring element determining the filling quantity and / or the filling weight and / or the filling height in the container, and that the shut-off valve 6 is only then closed in a time-controlled manner.

The 3 and 4 show as a further embodiment a filling element 1 a, wherein in these figures the same reference numerals as in the figures for those elements which correspond at least in their function to the elements of the filling element 1 Fig. 1 and 2 are used. The filling element 1a differs from the filling element 1 essentially only in that the actuator designated 9a and again designed as an electromagnetic drive has a first drive element in the form of an annular stator 9a.1 with at least one stator winding, which is coaxial with the valve or Stroke axis FA arranged to enclose the valve seat 8 on a preferably circular-cylindrical circumferential surface, specifically with the formation of the magnetic gap, which in turn is arranged outside the liquid channel 3, between a second drive element in the form of a rotor 9a.2, which is provided on the outer surface of the valve seat 8 and, for example, by a permanent magnet arrangement is formed. The mode of operation of the filling element 1 is identical to the mode of operation of the filling element 1 described above. The stator 9a.1 is provided on the inner surface of a housing part 18, for example in the form of a ring, which, held on the connecting elements 14, encloses the valve seat 8 at least in part and together with the stator 9a.1 also forms an axial guide for the valve seat 8. The driver 10 of the filling element 1 is not required in the filling element 1a due to the special design and arrangement of the actuator 9a.

The Fig. 5 and 6 show in a representation similar to Fig. 1 and 2 two filling elements 1b of a filling system or a filling machine in the closed state ( Fig. 5 ) and when open ( Fig. 6 ), where in the Fig. 5 and 6 again for those elements which, at least in terms of their function, match the elements of the Fig. 1 and 2 correspond with the reference numbers of the Fig. 1 and 2 are designated. The filling elements 1b differ from the filling element 1 essentially only in that the respective flow control valve 5 is opened by the actuator 9 controlled by axially lowering the valve seat 8 in the flow direction A, ie by moving the valve body 8 in the valve or stroke axis FA in Direction towards the discharge opening 4, and that the flow control valve 5 is closed by lifting the valve seat 8 counter to the flow direction A. For this purpose, the valve body 7 is held at least partially within the upper section 3.2 of the liquid channel 3 via the webs 7.1 held on the housing part 12.

The filling elements 1b are also used, for example, in such a way that at the start of the respective filling process and after arranging a container 2 under the respective filling element 1b, both the flow control valve 5 is closed by the valve seat 8 resting against the valve body 7 and the shut-off valve 6. The flow control valve 5 and the shut-off valve 6 are opened for the initiation of the filling phase, that is to say for the supply of the liquid filling material, this opening being able to take place at the same time or at different times or overlapping in time, for example by opening the flow control valve 5 and then opening it the check valve 6 or vice versa. During the filling phase, the volume flow of the filling material flowing into the container 2 can in turn be controlled or regulated by appropriate actuation of the actuator 9 with the flow control valve 5. The filling phase is ended by closing the shut-off valve 6. Then, for example, the flow control valve 5 is moved back into its closed position with the actuator 9, but it is also possible to move the flow control valve 5 after the filling phase has ended, that is to say after the shut-off valve 6 has been closed, in preparation for a further filling which follows in time to keep an open or partially open state. A particular advantage of the filling element 1b is that, at least when the shut-off valve 6 is open, the opening of the flow control valve 5 is supported by the filling material flowing through the liquid channel 3 and / or the filling material pressure, and that the closing and holding of the filling element 1b is not supported by the flow control valve 5 , but takes place by the shut-off valve 6, possibly only supported by the flow control valve 5, so that in the closed state of the filling element 1b for the actuator 9 no or only a very reduced control current is required.

The 7 and 8 show as a further embodiment a filling element 1c in the closed state ( Fig. 7 ) and when open ( Fig. 8 ). In the 7 and 8 are in turn for such elements that, at least in terms of their function, correspond to the elements of the Fig. 1 and 2 the same reference numerals as in the Fig. 1 and 2 used. The filler element 1c differs from the filler element 1b only in that the actuator 9a is used instead of the actuator 9, specifically with the annular stator 9a.1 and the rotor, which is arranged coaxially with the valve or stroke axis FA and surrounds the valve seat 8 9a.2 (eg permanent magnet arrangement) on the preferably circular cylindrical outer surface of the valve seat 8. The function of the filling element 1c corresponds to the function of the filling element 1b.

As already shown, it is particularly advantageous if the filling element 1 is designed such that the control forces for opening, adjusting and closing the respective flow control valve 5 of a filling element according to the invention are not influenced by the effect of the pressure of the filling material.
For this purpose, it is proposed according to the invention to provide a liquid valve arrangement in the liquid channel 3 which comprises at least one flow control valve 5 and a shutoff valve 6, the shutoff valve 6 being arranged behind the flow control valve 5 in relation to the flow direction of the filling material. The flow control valve 5, at least including the valve body 7 and valve seat 8, and at least a portion of the liquid channel 3.2, 3.3 are designed accordingly.
Furthermore, it is proposed that the at least one section of the liquid channel 3.2, 3.3 be formed from a flexible, deformable element.

For example, from a membrane, roll membrane or, particularly preferably from a bellows.
Two sections 3.2, 3.3 of the liquid channel 3 are particularly preferably provided, wherein both sections 3.2, 3.3 are each formed using a flexible, deformable element. These two sections 3.2, 3.3 of the liquid channel 3 are preferably each formed by at least one bellows.

The respective outer and / or inner dimensions of the at least one bellows of the first section 3.2 of the liquid channel 3 and the corresponding dimensions of the at least one bellows of the second section 3.3 of the liquid channel 3 are selected such that the sum of the effects of the pressure of the filling material and / or the sum of the effects of the flow of the filling material on both sections 3.2, 3.3 of the liquid channel 3 is zero or essentially zero.

The contact pressure generated by the pressure of the filling material is essentially determined by the effective diameter of the bellows.
The effective diameter of a bellows, which is decisive for the force resulting from the pressure of the filling material in the direction of the main axis of the valve seat 8 of the flow control valve 5, depends on the small inner bellows diameter di and the larger outer bellows diameter da and corresponds to the root (((di ² + da ² ) / 2).

By appropriate selection of the effective diameter of the bellows, the forces acting in the individual sections 3.2, 3.3 of the liquid channels 3 by the pressure of the filling material in the direction of the valve seat 8 of the flow control valve 5 can be set such that these compensate or essentially compensate such that the force resulting from the pressure of the filling material does not or essentially does not load the valve seat 8 of the flow control valve 5. This procedure allows a significant reduction in the required actuation forces of the flow control valve.

The invention has been described above using an exemplary embodiment. It goes without saying that numerous changes and modifications are possible. Thus, instead of the actuators 9 and 9a designed as electromagnetic drives, other electrical actuators, such as, for example, servomotors, stepper motors, etc. can also be provided, or the controlled axial movement of the respective valve seat 8 takes place via a mechanical control, for example one with at least one Cam track interacting roller.

LIST OF REFERENCE NUMBERS

1, 1a-1c

filler

2

container

3

liquid channel

3.1

Connection of the liquid channel

3.2, 3.3

Section of the fluid channel

4

discharge opening

5

Flow control valve

6

check valve

7

valve body

7.1

web

8th

valve seat

9, 9a

actuator

9.1, 9a.1

stator

9.2, 9a.2

Rotor of the actuator 9, 9a

10

takeaway

11

tubular section

12, 13

housing part

14

connecting element

15

circuit board

16, 17

poetry

18

housing part

A

Flow direction of the filling material during filling

B

Stroke of the valve seat 8

FA

Valve or stroke axis

Claims (10)

1. Filling element for the controlled dispensing of liquid contents or of a liquid product into packages (2), with at least one liquid channel (3), in which at least one liquid valve arrangement is provided, wherein the liquid valve arrangement can be controlled between a state in which the dispensing of the liquid contents to the package (2) via at least one dispensing opening (4) of the liquid channel (3) is enabled in a filling phase, and a state in which the liquid channel (3) is blocked, and therefore blocks the dispensing of the liquid contents, wherein the liquid valve arrangement comprises at least one flow regulating valve (5), which can be controlled and regulated by an actuator (9, 9a), with which, during the filling phase, the volume flow of the filling product flowing to the package (2) can be regulated or controlled, and wherein the liquid valve arrangement comprises at least one blocking valve (6) which can be controlled between an open and a closed state, wherein the blocking valve (6) is provided in the liquid channel (3) between the flow regulating valve (5) and the at least one dispensing opening (4), wherein the flow regulating valve (5) comprises a valve body (7) arranged in the liquid channel (3), and a valve seat (8), assigned to this valve body (7) and formed, for example, from a ring body, and that the valve body (7) and the valve seat (8) can be moved by the actuator (9, 9a) relative to one another along a valve axis or lift axis (FA), characterised in that
   for opening and closing the flow regulating valve (5), the valve seat (8) can be moved by the actuator (9, 9a) in an axial direction of the valve axis or lifting axis, which is opposed to the flow direction (A) in which the filling product flows through the liquid channel (3) during the filling phase, or, however, is oriented in this flow direction (A), wherein, related to the flow direction (A) of the filling product, a part section (3.2) of the liquid channel (3) upstream of the valve seat (8) and a part section (3.3) downstream of the valve seat (8) are formed in each case by a flexible seal (16, 17), preferably in the form of a folding bellows, allowing for a change of length.
2. Filling element according to claim 1, characterised in that an axial guide is
   provided for the movable valve seat (8) of the flow regulating valve (5), wherein the axial guide is formed by a housing part (18) and/or by connecting elements (14) of a housing.
3. Filling element according to any one of the preceding claims, characterised in that the actuator (9, 9a) is a mechanical control unit with at least one running roller (20), which interacts with at least one curved track (21), or an electric actuator in the form of a servomotor or stepping motor, or an actuator (9, 9a) in the form of a magnetic or electromagnetic drive or linear drive.
4. Filling element according to claim 3, characterised in that the magnetic or electromagnetic actuator (9, 9a) comprises a first drive element, preferably configured as a stator (9.1, 9a.1), which takes effect by way of a magnetic gap on a second drive element, configured, for example, as a rotor (9.2, 9a.2), and that the magnetic gap is provided outside the liquid channel (3), for example at a driver pin (10) projecting laterally from the movable valve seat (8) or at an outer surface of the movable valve seat (8).
5. Filling element according to claim 3 or 4, characterised in that the electrical actuator (9, 9a) is magnetic coil arrangement, preferably forming the stator (9.1, 9a.1), with several magnetic coils or magnetic poles offset in the direction of the valve axis or lifting axis (FA), which take effect on the second drive element (9.2, 9a.2), preferably configured as a stator and formed, for example, by at least one permanent magnet.
6. Filling element according to claim 4 or 5, characterised in that the second drive element (9.2, 9a.2) is provided at a driver pin (10), projecting laterally from the valve seat (8), or at the valve seat (8).
7. Filling element according to any one of the preceding claims, characterised in
   that it is configured as a single or multiple filling element.
8. Filling element according to any one of the preceding claims 1-7, characterised in that the dimensions of the flexible seal (16, 17), allowing for an axial change of length, are selected in such a way that the sum of the effects of the pressure of the filling product and/or the sum of the effects of the flow of the filling product on both sections (3.2, 3.3) of the liquid channel (3) is nil or essentially nil.
9. Filling element according to claim 8, characterised in that the effect diameters of the folding bellows are selected in such a way that the forces which take effect in the individual sections of the liquid channels (3.2, 3.3) due to the pressure of the filling product in the direction of the valve seat (8) of the flow regulating valve (5) are compensated or essentially compensated, such that the force resulting from the pressure of the filling product do not or essentially do not impose a load on the valve seat (8) of the flow regulating valve (5).
10. Filling machine for filling packages with a filling product, with a filling system comprising at least one filling element (1, 1a-1c), characterised in that the filling elements (1, 1a-1c) are configured in accordance with any one of claims 1-7.

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