WO2015043670A1

WO2015043670A1 - Valve for a dispenser

Info

Publication number: WO2015043670A1
Application number: PCT/EP2013/070315
Authority: WO
Inventors: Günter ZETTLITZER; Hans Koch
Original assignee: Ecolab Inc
Current assignee: Ecolab Inc
Priority date: 2013-09-30
Filing date: 2013-09-30
Publication date: 2015-04-02
Anticipated expiration: 2016-03-30

Abstract

A safety valve (10), in particular for a dispenser (16) for dispensing a substance (18) in form of a fluid, comprises a valve housing (12) with at least one inlet (22) and at least one outlet (24) fluid permeable connected to an internally arranged inlet opening (44) and an internally arranged outlet opening (46), a rotary slide (48) with at least a first valve port (52), wherein the rotary slide (48) is rotatable around a first axis (50) into an opened and/or closed position, and at least one rotary element (30) connected to the rotary slide (48) for actuating the safety valve (10) by rotating the rotary element (30) into the opened and/or closed position, wherein in the opened position, the first valve port (52) and the rotary slide (48) cooperates with the inlet opening (44) and/or the outlet opening (46) in order to enable the flow of a fluid from the inlet (22) to the outlet (24), while blocking the flow of the fluid in the closed position, wherein the rotary element (30) is a functional part (32) of the dispenser (16). Designing the rotary element (30) as a functional part of the dispenser (16), which must be handled by a person working on the dispenser (16), for example refilling the substance, the safety valve (10) is activated and the person is protected from being sprayed or contaminated by the substance (18).

Description

VALVE FOR A DISPENSER

Technical field of the invention

The present invention relates to a safety valve in particular for a dispenser for dispensing a substance in form of a fluid.

Background of the invention Substances used for cleaning, in particular in industrial washing systems, are often solid substances which usually need to be dissolved and/or diluted by a fluid, for example by water, in a dispenser. Dispensers for dispensing such substance are usually part of a dosing system, for example of a flushing or spraying dosing system, which are widely used in industrial, medical or household applications.

The substance that is to be dosed by the dosing system is usually held within the dispenser and may be a fluid, a paste or a solid but soluble substance, which may be dissolved by spraying or flushing the solid substance, for example with water. The substance which may be dissolved by spraying or flushing is provided to the dosing system in form of a fluid which may then be dosed as desired. The dispenser may be connected to the water mains and the water for spraying or flushing the substance may be pressurized, for example with a pressure of about 6 bar. Therefore, it is necessary to provide safety measures for protecting a person performing a refill, repair or service work on the dispenser of the flushing or spraying dosing system.

Thus, there is a permanent need to increase the safety for a person working on the dispenser of a dispensing system.

It is therefore an object of the present invention to provide an improved safety valve for a dispenser, which enhances the safety for a person working on the dispenser of the dispensing system, by providing a reliable interruption of the water supply of the dispenser.

SUMMERY OF THE INVENTION

This object is solved by means of a safety valve for a dispenser for dispensing a substance as a fluid, having the features of claim 1. Preferred embodiments, additional details, features, characteristics and advantages of the object of the invention of said safety valve are disclosed in the sub-claims.

Al

In a general aspect of the invention, the safety valve, in particular for a dispenser for dispensing a substance in form of a fluid, comprises a valve housing with at least one inlet and at least one outlet fluid permeable connected to an internally arranged inlet opening and an internally arranged outlet opening, a rotary slide with at least a first valve port, wherein the rotary slide is rotatable around a first axis into an opened and/or a closed position, and at least one rotary element connected to the rotary slide for actuating the safety valve by rotating the rotary element into the opened and/or closed position, wherein the opened position, the first valve port of the rotary slide cooperates with the inlet opening and/or the outlet opening in order to enable the flow of a fluid from the inlet to the outlet, while blocking the flow of the fluid in the closed position, wherein the rotary element is a functional part of the dispenser. The safety valve may be used with a dispenser of a dosing system, in particular of a flushing or spraying dosing system, wherein the substance that is to be dosed in form of a fluid may be held in the dispenser and may be dissolved in the dispenser, for example by flushing or spraying the substance with water, in particular with hot and/or pressurized water. The substance may be a fluid, a paste or a water soluble solid. The dispenser may be connected to the water mains, wherein the safety valve is provided in order to enable the shut-off of the water supply and for stopping the flushing or spraying of the substance, when a person is working on the dispenser, for example refilling the substance. The safety valve may comprise a valve housing, with at least one inlet and at least one outlet, wherein the inlet may for example be fluid permeable connected to the water mains and the outlet may be connected to a flushing or spraying element of the dispenser for spraying or flushing the substance. The valve housing may be formed as part of or may be formed integrally with a dispenser housing. The inlet may be connected fluid-permeable to an inlet opening which is arranged internally inside the valve housing, wherein the outlet may be connected to an internally arranged outlet opening. In between the inlet opening and the outlet opening, a rotary slide with at least a first valve port may be arranged, wherein the rotary slide is rotatable around a first axis into an opened and/or closed

position. In the opened position, a fluid, for example water, may pass through the inlet to the inlet opening and may reach the outlet opening by passing the first valve port of the rotary slide and may flow through the internally arranged outlet opening in order to exit through the outlet. In the closed position, the rotary slide may be rotated around the first axis in either direction, so that the valve port is rotated away from the inlet opening or the outlet opening, so that the inlet opening or the outlet opening is blocked by the rotary slide so that no fluid, in particular water, may flow from the inlet to the outlet. Thus, the flow of water is interrupted and the spraying or flushing of the substance is stopped. The rotary slide may be arranged at least partially inside the valve housing. A rotary element, which may be arranged outside the valve housing, may be connected to the rotary slide for actuating the safety valve by rotating the rotary element into the opened and/or closed position. The rotary element

connected to the rotary slide may be a functional part of the dispenser. A functional part of the dispenser may be a part that must be handled, for example by rotational and/or translational movement, by a person working on the dispenser, for example when repairing or refilling the substance inside the dispenser. The functional part of the dispenser may be rotatable around the first axis and/or may be connected to the rotary slide by a

transmission.

The safety valve according to the present invention has a few advantages over devices according to the state-of- the-art. For example, by designing the rotary element as a functional part of the dispenser, which must be handled by a person working on the dispenser, for example

refilling the substance, the shutoff valve is forcefully activated and the person is protected from being sprayed or contaminated by the substance or hot water. Even if the operator forgets to shut-off or disconnect the water mains, a safe operating or handling of the dispenser is ensured. Furthermore, an accidental activation of the dispenser and thus a contaminating of the operator with the substance or water is avoided as the safety valve is only opened once the functional part of the dispenser has been returned into its original position, for example the closed position. Another advantage of the improved safety valve is the simple construction and the simple

activating mechanism so that equipment costs and

mechanical expenses for the dispenser may be reduced.

A2

In another embodiment of the invention, the at least first valve port and the inlet or outlet opening are designed in form of cooperating control slits comprising an opening angle a, in particular wherein a ≤ 10°, preferably a ≤ 6°, most preferably a ≤ 4°. The cooperating control slits may comprise cooperating control edges for controlling the flow of the fluid, in particular the water, through the first valve port and the inlet or outlet opening. The cooperating control edges may be arranged on opposing sides of the control slits facing each other, wherein one control edge is arranged on the at least first valve port and the

cooperating control edge on the inlet or outlet opening. By rotating the rotary slide, for example from the opened into the closed position, the distance between the control edges may be reduced, until they overlap, at which moment the flow of water is interrupted and the spraying or flushing of the substance is stopped. The opening angle a is the angle that the rotary slide needs to be rotated around the first axis from an opened position to the closed position wherein in the closed position, the safety valve is closed and no fluid may pass the first valve port and the inlet or outlet

opening. The control slits may be designed in form of narrow slits extending along at least part of the first axis. The width of the control slits in a direction around the first axis may influence the opening angle a, wherein narrow slits with a very small width around the first rotary axis may provide for a very small opening angle a. The opening slits may be arranged and designed so that the opening angle a is smaller than 10°,

preferably smaller than 6° and most preferably smaller than 4°. By designing the first valve port and the inlet or outlet opening in form of control slits, the

hysteresis of the safety valve may be kept very small, for example 10°, 6° or 4°. Hence, the hysteresis of a safety valve comprising an opening angle a according to the invention is much smaller than the hysteresis of a common ball valve, which may have a hysteresis and an opening angle of about 80°. This has the advantage that the safety valve is activated as soon as the functional part of the dispenser is rotated, for example by 10°, 6° or 4° around the first axis. Therefore, a spraying or flushing of the substance is deactivated by the shutoff valve as soon as the functional part of the dispenser is rotated by the opening before any substance or water may exit the dispenser, so that the operator is protected from being sprayed or contaminated by the chemical or the hot water. The small hysteresis of the safety valve has also the advantage that a spraying of flushing of the substance may only start after the functional part of the dispenser has been completely, for example less than 4°, closed .

A3

In another preferred embodiment of the invention, the functional part of the dispenser is an access cover of the dispenser for accessibly covering an opening in the dispenser housing or a container for holding the

substance. The substance may be held inside a container, for example inside the dispenser housing, and may be covered by an access cover. The access cover may be designed in form of a dispenser lid covering an opening of the container holding the substance. The access cover or dispenser lid may be connected to the rotary slide so that when an operator lifts the access cover or dispenser lid, for example by rotating it around the first axis, the safety valve is automatically activated after rotating the access cover or dispenser lid around the opening angle a . A restart of the flushing or spraying operation of the dispenser is only possible after the access cover or dispenser lid has been fully closed before the safety valve opens and allows the fluid to pass through the safety valve. Also, the container holding the substance may be rotatable arranged inside the dispenser housing, so that a person refilling the substance needs to rotate the container, for example sideways, out of the dispenser housing in order to refill the substance. The container for holding the substance may be the functional part of the dispenser and may be connected to the rotary slide, so that by rotating the container into a position for refilling the substance, the safety valve may be activated once the container is rotated around the opening angle a . The container and/or the dispenser housing may be designed in a way that the opening of the container for refilling the substance may only be accessible after the container has been rotated around the opening angle a . This has the advantage that the safety valve stops the flushing or spraying operation before opening for refilling the substance of the

container is accessible by the operator thus avoiding the operator being harmed by the substance or hot water.

A4

In a particular preferred embodiment of the invention, the access cover comprises a framed flap, in particular wherein the frame of the flap comprises a variable height along its circumference. The height of the frame may relate to the opening angle and may be designed in a way so that no fluid may exit the dispenser until the shutoff valve is activated. The frame of the flap may be designed in a way that the frame overlaps the container holding the substance at least until the access cover is rotated to the opening angle a . This has the advantage that the opening covered by the access cover is closed for as long as the water and/or the dissolved substance is flowing and at least until the opening angle a is reached so that a person operating the access cover is protected from being sprayed by the substance or hot water.

A5

In a further preferred embodiment, the valve housing comprises a valve liner for holding the rotary slide, wherein the valve liner comprises the inlet opening and/or the outlet opening. The valve liner may be

designed according to the shape of the rotary slide, for example in form of a cylindrical or a plane valve liner. The inlet opening and/or the outlet opening may be designed in form of opening slits, for example of an essentially rectangular shape, and may be arranged parallel and/or angled to the first axis. The valve liner and the rotary slide held by the valve liner may be of high tolerances in order to avoid any leakage of a fluid, in particular of water of the pressurized water mains, especially in a closed position of the safety valve. The valve liner may be arranged inside the valve housing and may be designed in one piece or as an extra part being inserted into the valve housing. As the valve liner and the rotary slide need high tolerances in order to provide only a small leakage or to avoid the leakage of a fluid, production costs may be reduced by designing the valve liner as an external part. A6

In a further preferred embodiment, the valve liner is at least partially arranged inside the valve housing and is connected to the outside of the valve housing. The valve liner may be connected to the valve housing, in

particular to the outside of the valve housing, by a support plate, in order to provide a non-rotatably attachment of the valve liner to the valve housing. This provides an efficient way for assembling the valve liner and the safety valve.

A7

In a further preferred embodiment of the invention, the rotary slide is designed in form of an at least partial hollow cylinder, wherein at least the first valve port is arranged in a lateral area and/or a frontal area of the rotary slide. The design of the rotary slide in form of an at least partial hollow cylinder has the advantage that the fluid may pass through the rotary slide from the inlet opening to the outlet opening while allowing a second valve port which may correspond to the outlet port may be integrated into the rotary slide, thus further increasing the safety and reliability of the safety valve. The first and/or second valve port may be designed in form of slits, which may be arranged in parallel or at an angle, for example partially helically shaped, around the first axis. A8

In a preferred embodiment of the invention, the rotary slide comprises a flat area, wherein at least the first valve port is arranged in the flat area of the rotary slide. The rotary slide may be designed in form of a flat-shaped element, rotatable around the first axis, and comprising at least the first valve port, for example in form of a slit. The first valve port may be designed in form of a slit arranged parallel and/or at an angle to the first axis, or in particular at least partially helically shaped, curved or radially arranged. Designing the rotary slide in form of a flat-shaped element has the advantage that the size of the safety valve may be further reduced while increasing the safety of an

operator of the dispenser comprising the safety valve.

A9

In a further preferred embodiment of the invention, the rotary slide and the rotary element are connected by a flange, a plug connection and/or a positive locking connection. This has the advantage that the rotary element may be connected torque-proof to the rotary slide, avoiding any relative movement between the rotary element and the rotary slide which would reduce the safety by increasing the opening angle a.

A10

In a further preferred embodiment of the invention, the inlet and/or the outlet is designed in form of a

connector removably connected to the valve housing. The removable connector may be a standard part which allows for reducing the production costs and also increases the ability to adapt the safety valve to different types of dispensers . All

A further aspect of the present invention is a dispenser in particular for dispensing a solid but soluble

substance, for a flushing and/or spraying dosing system, comprising at least one safety valve as previously described .

A12

A further aspect of the present invention is the system, in particular a flushing and/or spraying dosing system, comprising at least one dispenser as described above with at least one safety valve as previously described.

The aforementioned components, as well as the claimed components and the components to be used in accordance with the invention in the described embodiments, are not subject to any special exceptions with respect to their size, shape, material selection and technical concept such that the selection criteria known in the pursuant field can be applied without a limitation.

DESCRIPTION OF THE FIGURES

Additional details, features, characteristics and advantages of the object of the invention are disclosed in the sub-claims, the figures and the following description of the respective figures and examples, which in exemplary fashion - show an embodiment and an example of a safety valve according to the invention. In the drawings :

Fig. 1 shows a perspective view of a dispenser comprising a safety valve according to the present invention;

Fig. 2 shows a cross-sectional drawing of a safety valve in an opened position;

Fig. 3 shows a cross-sectional drawing of a safety valve with an opening angle a;

Fig. 4 shows a safety valve in a closed position;

Fig. 5 shows the safety valve of Fig. 4 in a closed position with an opening angle a of about 90°;

Fig. 6A shows a perspective view of an access cover in form of a framed lid; Fig. 6B shows a perspective view of an access cover with a frame of variable height; Fig. 7 shows an access cover attached to the rotary slide; and

Fig. 8 shows a perspective view of the safety valve in a disassembled display.

The illustration in Fig. 1 shows an embodiment of the present invention. In Fig. 1, a safety valve 10 is shown with a valve housing 12 arranged inside a dispenser housing 14 of a dispenser 16 of a dosing system, in particular of a flushing or spraying dosing system. The substance 18 that is to be dosed by the dispenser 16 is held in a container 20 of the dispenser 16. The substance 18 may be a liquid substance, a paste, or a solid but soluble substance. For dissolving a solid substance 18 for example, the dispenser 16 may be connected to a water mains, not shown, with water entering through an inlet 22 of the safety valve 10 and exiting the safety valve 10 through an outlet 24, in order to be directed to a spraying element, not shown, where the water, which may be of a higher temperature and which may be pressurized, is sprayed onto the substance 18, in order to dissolve the substance 18 so that the substance 18 may be dosed in form of a fluid. The container 20 of the dispenser 16 may comprise an opening 26 for refilling the substance 18 inside the container 20. The opening 26 is covered by an access cover 28 which is a rotary element 30 connected to the safety valve 10. The rotary element 30, the access cover 28, is a functional part 32 of the dispenser 16, as the rotary element 30, i.e. the access cover 28, must be operated, for example lifted, by an operator for refilling the substance 18 inside the container 20 of the dispenser 16. By opening the access cover 28, the operator activates the safety valve 10 which immediately shuts off the water supply thus protecting the operator from being contaminated with the substance or being sprayed by water or dissolved substance 18. The access cover 28 is designed in form of a framed lid wherein the frame 34 comprises a variable height around its circumference, wherein the height of the frame is designed in a way to provide an overlap 36 with the container 20 of the dispenser 16. The overlap 36 is designed in a way that the access cover 28 overlaps the container 20 until the safety valve 10 is activated and the water supply interrupted. Fig. 2 shows in the cross-sectional view the safety valve 10 in an opened position. The inlet 22 and the outlet 24 of the safety valve 10 are designed in form of removable connectors 38 which are arranged inside the valve housing 12 and comprise seals 40 in order to avoid a leakage of a fluid, in particular the water. Inside the valve housing 12, a valve liner 42 is arranged, wherein the valve liner 42 comprises an inlet opening 44 corresponding to the inlet 22 and an outlet opening 46 corresponding with the outlet 24. Inside the cylindrical valve liner 42, a cylindrical and at least partially hollow rotary slide 48 is arranged, wherein the rotary slide 48 is arranged rotatably around a first axis 50 inside and coaxially with the valve liner 42. The rotary slide 48 comprises a first valve port 52 cooperating with the inlet opening 44 and a second valve port 54 cooperating with the outlet opening 46. In the illustrated opened position, water enters the inlet 22, for example from the water mains, and passes through the inlet opening 44 through the first valve port 52 into the rotary slide 48, and then passing the second valve port 54 and the outlet opening 46 in order to exit the safety valve through the outlet 24. The first and second valve port 52, 54 and the inlet and outlet opening 44, 46 may be designed in form of slits arranged in parallel to the first axis 50. The edges of the valve port 52, 54 and the inlet and outlet opening 44, 46 may be designed in form of control edges 56, which cooperate in order to enable the closing of the inlet and/or outlet opening 44, 46 by rotating the rotary slide 48 and thus the valve port 52 and/or 54 around the first axis in order to close the safety valve and stop the flow of water.

In Fig. 3, the safety valve 10 is shown in a closed position, wherein in the closed position, the rotary slide 48 is rotated around the first axis by an opening angle a. The opening angle a is the angle by which the rotary slide 48 needs to be rotated from the opened position until the control edges 56 of for example the first valve port 52 and the inlet opening 44 meet, thus shutting off the flow of water by blocking the inlet opening 44 completely. The opening angle a shown in Fig. 3 may be about 6°. The rotary slide 48 may be rotated further, as shown in Fig. 4, for example by rotating the functional part, not shown, of the dispenser even further, wherein the functional part may be designed in form of an access cover 28, covering a container 20 holding a substance 18. In a position where the functional part of the dispenser may be fully opened, for example the access cover, the opening angle a may be about 90°. In this position, the safety valve is still in a closed position, although the water may pass through the inlet opening 44 and through the second valve port 54 into the inside of the rotary slide 48. As the outlet port 46 is still closed and blocked by the rotary slide 48, no water may leave the safety valve, thus ensuring the function of the safety valve.

A functional part in form of an access cover 28 is shown in Fig. 6A attached to the rotary slide 48 which is arranged inside the valve housing 12. In this position, the functional part 32 would be covering the opening not shown of the container not shown so that the safety valve 10 would be open allowing water to pass in order to dissolve the soluble substance 18. If the access cover 28 would be opened by for example about 90°, as shown in Fig. 6B, the actuating of the access cover 28 would operate and rotate the rotary slide 48 of the safety valve 10, thus closing the safety valve 10 and ensuring the safety of the operator. The functional part 32 of the dispenser 16 in form of the access cover 28 may be connected to the rotary slide 48 by a positive locking connection 58. This ensures and provides a torque-proof connection of the access cover 28. The access cover 28 is designed in form of a framed lid wherein the frame 34 comprises a variable height around its circumference. The variable height of the frame 34 is designed in a way that an opening, not shown, is covered until the opening angle a is reached, thus ensuring that an operator might not be contaminated or sprayed when opening or operating the access cover 28. Fig. 7 shows that the access cover 28, which is the rotary element 30 of the safety valve, is connected by a positive locking connection 58 to the rotary slide 48. Enabling a rotation of the rotary element 30 around the first axis 50 at least until the opening angle a is reached, before an opening is accessible.

Fig. 8 shows a perspective view of a disassembled safety valve 10, the rotary slide 48 is designed in form of a cylindrical and at least partial hollow cylinder, comprising a positive locking connection 58 at its distal end, which in an assembled state would be arranged outside the valve housing 10. The rotary slide 48 comprises at least one first valve port 52, which is arranged in form of a control slit 60 in parallel to the first axis 50. The first valve port 52 corresponds in an assembled state to an inlet opening 44, which is also designed in form of a control slit 60, and which is arranged inside a cylindrical shaped valve liner 42. The valve liner 42 is connectable to the outside of the valve housing 12 by a support plate 62 and four connecting means 64, in form of screws. The inlet 22 and the outlet 24 are designed in form of removable connectors 38, which may be arranged inside the valve housing 12 and may be sealed by seals 40. In an assembled state, the rotary slide 48, which is at least partially arranged inside the valve liner 42, may also be sealed by seals 40 in order to avoid any leakage of the fluid to the outside of the safety valve 10.

The particular combinations of elements and features in the above detailed embodiments are exemplary only; the interchanging and substitution of these teachings with other teachings in this and the patents/applications incorporate by reference are also expressly contemplated. As those skilled in the art will recognize, variations, modifications, and other implementations of what is described herein can occur to those of ordinary skill in the art without departing from the spirit and the scope of the invention as claimed. Accordingly, the foregoing description is by the way of example only and is not intending as limiting. In the claims, the wording "comprising" does not exclude other elements or steps, and the identified article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. The inventions scope is defined in the following claims and the equivalents thereto. Furthermore, reference signs used in the description and claims do not limit the scope of the invention as claimed.

List of reference signs

10 safety valve

12 valve housing

14 dispenser housing

16 dispenser

18 substance

20 container

22 inlet

24 outlet

26 opening of container

28 access cover

30 rotary element

32 functional part

34 frame

36 overlap

38 connector

40 seal

42 valve liner

44 inlet opening

46 outlet opening

48 rotary slide

50 first axis

52 first valve port

54 second valve port

56 control edges

58 positive locking connection

60 control slit

62 support plate

64 connecting means

Claims

1. A safety valve, in particular for a dispenser (16) for dispensing a substance (18) in form of a fluid, comprising a valve housing (12) with at least one inlet (22) and at least one outlet (24) fluid permeable

connected to an internally arranged inlet opening (44) and an internally arranged outlet opening (46), a rotary slide (48) with at least a first valve port (52), wherein the rotary slide (48) is rotatable around a first axis

(50) into an opened and/or closed position, and at least one rotary element (30) connected to the rotary slide (48) for actuating the safety valve (10) by rotating the rotary element (30) into the opened and/or closed

position, wherein in the opened position, the first valve port (52) and the rotary slide (48) cooperates with the inlet opening (44) and/or the outlet opening (46) in order to enable the flow of a fluid from the inlet (22) to the outlet (24), while blocking the flow of the fluid in the closed position, wherein the rotary element (30) is a functional part (32) of the dispenser (16) .

2. The safety valve according to claim 1, characterized in that the at least first valve port (52) and the inlet opening (44) or outlet opening (46) are designed in form of cooperating control slits (60) comprising an opening angle a, in particular wherein a ≤ 10°, preferably a ≤ 6°, most preferably a ≤ 4°. 3. The safety valve according to claim 1 or 2,

characterized in that the functional part (32) of the dispenser (16) is an access cover (28) of the dispenser (16) for accessibly covering an opening (26) in the dispenser housing (14) or is a container (20) for holding the substance (18) . 4. The safety valve according to claim 3, characterized in that the access cover (28) comprises a framed flap, in particular wherein the frame (34) of the flap comprises a variable height along its circumference 5. The safety valve according to any of the claims 1 to 4, characterized in that the valve housing (12) comprises a valve liner (42) for holding the rotary slide (48), wherein the valve liner (42) comprises the inlet opening (44) and/or the outlet opening (46) .

6. The safety valve according to claim 5 characterized in that the valve liner (42) is at least partially arranged inside the valve housing (12) and/or is

connected at the outside of the valve housing (12) .

7. The safety valve according to any of the claims 1 to 6, characterized in that the rotary slide (48) is

designed in form of an at least partial hollow cylinder, wherein at least the first valve port (52) is arranged in a lateral area and/or a frontal area of the rotary slide (48) .

8. The safety valve according to any of the claims 1 to 6, characterized in that the rotary slide (48) comprises a flat area, wherein at least the first valve port (52) is arranged in the flat area of the rotary slide (48) .

9. The safety valve according to any of the claims 1 to

8, characterized in that the rotary slide (48) and the rotary element (30) are connected by a flange, a plug connection and/or a positive locking connection (58).

10. The safety valve according to any of the claims 1 to

9, characterized in that the inlet (22) and/or the outlet (24) is designed in form of a connector (38) removably connected to the valve housing (12) .

11. A dispenser, in particular for dispensing a solid but soluble substance (18), for a flushing and/or

spraying dosing system, comprising at least one safety valve (10) according to claims 1 to 10, and at least one functional part (32) .

12. A system, in particular a flushing and/or spraying dosing system, comprising at least one dispenser (16) according to claim 11 with at least one safety valve (10) according to claims 1 to 10.