EP3292252B1 - Spray regulator having a slit-like recess as tool engagement surface - Google Patents

Description

The invention relates to a jet regulator with a jet regulator housing, which carries an external thread on its outer circumference with which the steel regulator can be mounted in a, provided in the water outlet of a sanitary outlet fitting internal thread, wherein a downstream housing end face of the jet regulator housing as a, flow holes for the water flowing through the jet regulator having grating or network structure is formed, which has at least one formed as a slot-shaped depression of this grid or network structure and intended for a turning tool engagement surface and wherein in the region of the first recess a likewise designated as a tool engagement surface second slot-shaped depression is provided.

From the EP 2 597 214 A1 already a jet regulator of the type mentioned above is already known, which has a sleeve-shaped jet regulator housing, which carries an external thread on its outer circumference. With the help of this external thread, the jet regulator housing is screwed directly into an internal thread, which is provided in the water outlet of a sanitary outlet fitting. The jet regulator is intended to form the water flowing out of the outlet fitting into a homogeneous, non-spraying, and possibly also soft, soft water jet. For this purpose, the downstream housing end face of the jet regulator housing is formed as a grid or network structure having a plurality of flow holes in which the water flowing through the jet regulator is guided and formed leading. Since the previously known Jet controller barely protruding beyond the water outlet of the sanitary outlet fitting, at least one slot-shaped depression is provided on the downstream grating or network structure, which is intended for example as a turning tool misappropriated coin as a tool engagement surface with which provided between the known jet regulator and the water outlet screw can be easily solved or tightened. In the FIGS. 1 to 4 the EP 2 597 214 A1 already an embodiment is shown, in which the tool engagement surface is formed as a cross-slot-shaped depression, in which the rotary tool can be used as needed in both a slot direction and in the other slot direction.

Since the recess provided at the downstream housing end face is reminiscent of a screw slot, and since a coin suitable for turning tools is not always readily available to the sanitary trade, many users are inclined to use an optionally also small screwdriver with a correspondingly narrow screwdriver blade. Since a screwdriver hardly fills the slot-shaped depression, the torque required in particular for releasing a possibly also calcified screw connection can hardly be applied to the previously known jet regulator. If even a small screwdriver is used, there is a risk that its screwdriver blade canted and that when applying an excessive torque, the depression levered laterally and the surrounding grid or network structure is widened or destroyed and the jet regulator is unusable.

From the US 2014/0263753 A1 , the DE 299 12 115 U1 and the US 2009 / 0293684A1 Are already known similar jet regulator, however, differ from each other in the design of the required rotary tool and provided in the outlet side portion of the jet regulator housing tool engagement surface.

It is therefore an object to provide a jet regulator of the type mentioned above, which is constructed so that such incorrect operation is counteracted without therefore the desired compact design of such a jet regulator is lost.

The inventive solution to this problem is in the jet regulator of the type mentioned is that the second recess compared to the first recess has a smaller Einsenkungsquerschnitt and is provided in the slot bottom of the first recess.

The jet regulator according to the invention has, in the region of its downstream first depression, a second depression, which likewise has the shape of a slot and is intended as a tool engagement surface. This second depression has a smaller depression cross-section compared to the first depression and is provided in the slot bottom of the first depression. While in the opposite larger first depression can be inserted as a turning tool misused coin or the screwdriver blade of a larger screwdriver, in the second depression and a smaller screwdriver can be inserted. In this case, such a rotary tool can be used to rotate a grid or network structure designed as a pivoting part, which in a socket on the housing inner circumference of the jet regulator housing is pivotally mounted, or the rotary tool is used to tighten and loosen the screw between the jet regulator and the water outlet. Since the second slot-shaped depression provided in the slot bottom of the first recess has a smaller depression cross-section, a smaller screwdriver can also be inserted into the second depression, which passes through the first depression practically without contact. Since with the help of smaller screwdriver in receiving second depression operating errors can be counteracted without therefore outside the grid or network structure projecting separate tool engagement surfaces must be formed, must therefore not be waived the compact design and structural design of such a jet regulator.

The compact design and the aesthetically pleasing design of the jet regulator according to the invention in the region of its outlet end face is further favored when the first and the second recess have a same shape and preferably rectangular Einsenkungsquerschnitt with Einsenkungslängs- and contrast shorter Einweisungsschmalseiten.

In this case, a preferred embodiment according to the invention provides that the first and the second recess axially parallel longitudinal axes and that the second recess in the depression bottom of the first depression is arranged approximately centrally.

Thus, when inserting a rotary tool this well and safely guided in the second recess, it is advantageous if the second: recess: formed as a blind hole is that on the side facing away from an end-side depression opening of the first recess side has a preferably closed slot bottom. Thus, the turning tool is only into the slot bottom of the second depression in this insertable.

A preferred embodiment according to the invention, through which the compact design of the jet regulator according to the invention is still favored, provides that the second depression extends into a formation which is formed on the end face of the grid or network structure facing away from the depression opening of the first depression is.

In this case, a preferred development according to the invention, which also allows the recording and transmission of higher torques on the grid or network structure, before, that the formation is reinforced by molded reinforcing ribs, which remote from the depression opening of the first depression end face of the grid or Project network structure and preferably cross in their extension in the jet regulator longitudinal axis.

In order to be able to guide the screwdriver blade well in the second depression when inserting a screwdriver, it is advantageous if the depression cross section of the second depression tapers at least in regions in the direction of the slot base.

For this purpose, a preferred embodiment according to the invention provides that the depression longitudinal and / or the depression transverse sides converge toward one another in the direction of the slot base. A particularly advantageous development according to the invention provides that the first recess has a circular arc-shaped depression base, wherein this countersunk base formed in the manner of a circle segment for receiving a tool other than a rotary tool and complementary in its outer contour shaped coin is intended. Such a circular depression base not only adapts well to the outer contour of a complementarily shaped and misappropriated as a rotary tool coin, but rather a rotary tool intended for the second depression is well performed on this circular base of the first depression, until this rotary tool, the depression opening of the second Depression finds. The circular arc-shaped configuration of the depression base of the first depression can thus substantially facilitate the simple handling during the assembly of the jet regulator according to the invention.

A preferred embodiment according to the invention provides that the second recess for receiving a turning tool serving as a screwdriver or screwdriver blade is intended. Thus, while in the first depression a diverted as a rotary tool coin can be introduced, in contrast, the second recess is provided for a screwdriver used as another rotary tool.

So that higher torques can also be transmitted to the grids or network structure surrounding the depressions, it is advantageous if the flow holes are arranged at a distance from the depression longitudinal and / or narrowing sides of the first depression, which distance is greater than the wall thickness from, between adjacent flow holes of the grid or network structure arranged separation or flow guide walls.

In order to provide a sufficient contact surface on the longitudinal sides of this depression to the rotary tool introduced into the first countersink, it is advantageous if the jet regulator has a convexly curved or bulged housing end face. By the convex bulge of the downstream housing end face also has the first depression in the region of the jet regulator longitudinal axis a correspondingly large longitudinal extension, which substantially increases the contact surface available to the turning tool in this region.

As has already been explained above, the depressions in the housing end face intended for corresponding turning tools can serve to rotate the lattice or network structure designed as a pivoting part and pivotably mounted in a joint socket provided on the inner housing circumference of the jet regulator housing in such a way that this lattice or network structure optionally has one compared with the jet regulator longitudinal axis changed outlet angle occupies, which deflects the exiting water in this direction. A preferred embodiment according to the invention, which additionally favors the handling of the jet regulator according to the invention, on the other hand, provides that the downstream housing end face is integrally connected to the jet regulator housing or to a downstream housing part of the multi-part jet regulator housing.

If the jet regulator according to the invention is also intended to form a sparkling-soft, that is ventilated outflow jet, it is advantageous if the jet regulator is designed as a ventilated jet regulator or as a so-called jet aerator.

Here, a preferred embodiment according to the invention provides that the jet regulator housing or the downstream housing part has an inner housing peripheral wall and at least one inner housing peripheral wall at a distance encompassing outer housing wall and that in the space between the inner housing peripheral wall and the adjacent outer housing peripheral wall at least one to the downstream side of the Jet regulator open towards and in the interior of the jet regulator housing opening venting channel is provided.

Further developments according to the invention will become apparent from the claims in conjunction with the description and the drawings. The invention will be described in more detail below with reference to a preferred embodiment.

Fig. 1

eine in einer perspektivischen Draufsicht auf ihre Auslaufstirnseite dargestellte sanitäre Einsetzeinheit, die am Wasserauslauf einer sanitären Auslaufarmatur montierbar ist und die einen abströmseitigen Strahlregler hat, dessen Strahlreglergehäuse eine als Gitter- oder Netzstruktur ausgebildete abströmseitige Gehäusestirnfläche aufweist, in der Einsenkungen vorgesehen sind, die jeweils für ein Drehwerkzeug als Werkzeugangriffsfläche dienen,

Fig. 2

die sanitäre Einsetzeinheit aus Figur 1 in einem Längsschnitt,

Fig. 3

die sanitäre Einsetzeinheit aus Figur 1 und 2 in einem gegenüber Figur 2 um 90° gedrehten Längsschnitt,

Fig. 4

das hier vereinzelt dargestellte Strahlreglergehäuse des zur sanitären Einsetzeinheit gemäß den Figuren 1 bis 3 gehörenden Strahlreglers in einer perspektivischen Draufsicht auf dessen abströmseitige Gehäusestirnfläche,

Fig. 5

das Strahlreglergehäuse aus Figur 4 in einer perspektivischen Draufsicht auf die Zuströmseite dieses Strahlreglergehäuses,

Fig. 6

das Strahlreglergehäuse aus Figur 4 und 5 in einer Seitenansicht,

Fig. 7

das Strahlreglergehäuse aus den Figuren 4 bis 6 in einer Draufsicht auf die dem Gehäuseinneren zugewandte Zuströmseite,

Fig. 8

das Strahlreglergehäuse aus den Figuren 4 bis 7 in einem Längsschnitt durch Schnittebene VIII-VIII aus Figur 7,

Fig. 9

das Strahlreglergehäuse aus den Figuren 4 bis 8 in einem gegenüber Figur 8 um 90° gedrehten Längsschnitt durch Schnittebene IX-IX aus Figur 8 und

Fig. 10

die sanitäre Einsetzeinheit aus den Figuren 1 bis 3 in einer auseinandergezogenen Einzelteildarstellung.

It shows:

Fig. 1

a in a perspective plan view of its outlet end face shown sanitary inserting unit which is mounted on the water outlet of a sanitary outlet fitting and which has a downstream jet regulator whose jet regulator housing has a designed as a grid or network structure downstream housing end face are provided in the depressions, each for a Rotary tool serve as a tool engagement surface,

Fig. 2

the sanitary inserting unit FIG. 1 in a longitudinal section,

Fig. 3

the sanitary inserting unit FIGS. 1 and 2 in one opposite FIG. 2 90 ° rotated longitudinal section,

Fig. 4

the jet regulator housing shown here isolated to the sanitary inserting unit according to the FIGS. 1 to 3 belonging beam regulator in a perspective plan view of the downstream housing end face,

Fig. 5

the jet regulator housing off FIG. 4 in a perspective Top view of the inflow side of this jet regulator housing,

Fig. 6

the jet regulator housing off FIGS. 4 and 5 in a side view,

Fig. 7

the jet regulator housing from the FIGS. 4 to 6 in a plan view of the housing interior facing the inflow side,

Fig. 8

the jet regulator housing from the FIGS. 4 to 7 in a longitudinal section through section plane VIII-VIII FIG. 7 .

Fig. 9

the jet regulator housing from the FIGS. 4 to 8 in one opposite FIG. 8 90 ° rotated longitudinal section through sectional plane IX-IX FIG. 8 and

Fig. 10

the sanitary inserting unit from the FIGS. 1 to 3 in an exploded single part illustration.

In the FIGS. 1 to 3 a sanitary inserting unit 1 is shown, which can be mounted in the water outlet of a sanitary outlet fitting not shown here and can be axially sealed against this water outlet by an annular seal 26. The insertion unit 1 has an inflow-side filter or attachment screen 2, which has to filter out the entrained water entrained dirt particles that could otherwise affect the function of this insertion unit. The insertion unit 1 also has a downstream jet regulator 3, which has the water flowing through to form a homogeneous, non-splashing and optionally also soft-pearly emerging water jet. Between the inflow side Front strainer 2 and the downstream jet regulator 3, a flow restrictor may be provided which reduces the flow area. Instead, however, a flow regulator 4 is arranged here, which adjusts the water flowing to the jet regulator 3 in a pressure-independent manner to a defined flow volume per unit of time.

The jet regulator 3 of the insertion unit 1 has a jet regulator housing 4, which in the FIGS. 4 to 9 is shown in more detail in different views. The jet regulator housing 4 carries on its housing outer circumference an external thread 5, with which the jet regulator 3 and with it also the insertion unit 1 in a provided in the water outlet of the sanitary outlet fitting internal thread can be mounted. From the FIGS. 1 to 10 It can be seen that a downstream housing end face 6 of the jet regulator housing 4 is designed as a grid or network structure having throughflow holes 7 for the water flowing through the jet regulator 3. This grid or network structure has at least one tool engagement surface formed as a slot-shaped depression 8, 9 of this grid or network structure and intended for a turning tool.

It is characteristic of the jet regulator 3 shown here that it has a second slot-shaped depression 9, which is likewise intended as a tool engagement surface for another rotary tool, in the slot bottom, and that the second depression 9 has a smaller depression cross-section compared to the first depression 8. The jet regulator 3 thus has in the slot bottom of the downstream first recess 8, the second recess 9, which is also configured slit-shaped and intended as a tool engagement surface. This second recess 9 has a smaller depression cross-section compared to the first recess 8. While in the opposite larger first depression 8 a purpose as a turning tool coin or the screwdriver blade of a larger screwdriver can be inserted into the second recess 9 and a smaller screwdriver can be inserted, which passes through the first recess 8 virtually contactless. In this case, such a rotary tool for rotating trained as a pivoting part grid or network structure can be used, which is pivotally mounted in a socket on the housing inner circumference of the jet regulator housing, or the rotary tool is used - as here - for tightening and loosening the screw between the jet regulator 3 and the water spout. Since with the help of, even smaller screwdriver in receiving second recess 9 operating error is counteracted, without therefore outside of the grid or network structure projecting separate tool engagement surfaces should be formed, the compact design and structural design of such a beam regulator 3 must therefore not be waived ,

In the FIGS. 1, 3 . 4 and 9 is particularly well recognizable that the first and the second recess 8, 9 have a same shape and here rectangular Einsenkungsquerschnitt mit Einsenkungslängs- and contrast shorter Einweisungsschmalseiten. The longitudinal axes of these depressions 8, 9 are arranged approximately in one plane, and the depression 9 is positioned approximately centrally or centrally in the slot bottom of the first recess 8.

The second recess 9 is formed as a blind hole, which on the front side of a depression opening 10 of the first recess 8 side facing away from a closed slot bottom 11 has. While the first recess 8 approximately axially parallel to the jet regulator longitudinal axis extending Einsenkungslängs- and Having Einenkungsschmalseiten, the Einsenkungsquerschnitt the second recess 9 tapers in the direction of the slot base 11 at least partially. For this purpose, the depression longitudinal sides as well as the narrowing sides of the second depression run towards each other in the direction of the slot base 11.

In the Figures 2 . 4 and 8th is particularly well recognizable that the first recess 8 is formed approximately circular segment-shaped and has an arcuate Einsenkungsschlitzgrund. The first recess 8 is thus suitable for receiving a purpose as a turning tool and in its outer contour approximately complementary shaped coin. In contrast, the second recess 9 is intended for receiving a rotary tool serving as a screwdriver or screwdriver blade. If a correspondingly small screwdriver with its screwdriver blade inserted into the first recess 8, the screwdriver blade first slides along the arcuate slot bottom of the first recess 8 until the screwdriver blade finds the depression opening of the second recess 9. Due to the tapered configuration of the second recess 9, this screwdriver blade is now well grasped in the second recess 9, in order subsequently to be able to absorb and transmit a corresponding torque in the area of the jet regulator longitudinal axis and thus in the center of the grid or network structure.

In the Figures 3 . 5 and 7 is particularly well recognizable that the second recess 9 extends into a formation 12, which projects beyond the depression of the opening 10 of the first recess 11 facing away from the end face of the grid or network structure. In order to prevent rupture of the grid or network structure in the region of the depressions 8, 9, reinforcing ribs 13 are provided, on the one hand to the molding 12 and on the other hand to the grid or network structure are formed. These reinforcing ribs 13 intersect in their extension approximately in the region of the jet regulator longitudinal axis. In order for the grid or network structure to be able to absorb and transfer the torques applied in the depressions 8, 9, the flow holes 7 are arranged at a distance from the longitudinal depression sides of the first depression 8, which is greater than the wall thickness of, arranged between adjacent flow holes 7 Separation or flow guide walls 14 of the grid or network structure.

The grid or network structure has a downstream bulge such that the jet regulator has a convexly curved housing end face. Due to the convex bulging of the housing end face, the depression longitudinal sides of the first recess 8 have an increased depth, whereby the contact surface available to the rotary tool is increased.

The downstream housing end face 6 and thus also the grid or network structure is integrally connected to the jet regulator housing 4. The jet regulator 3 is designed here as a ventilated jet regulator or as a so-called jet aerator. For this purpose, the jet regulator housing 4 has an inner housing peripheral wall 24 and an outer housing peripheral wall 24 at a distance encompassing outer housing peripheral wall 25, between which at least one to the downstream side of the jet regulator 3 out open and opening into the interior of the jet regulator housing 4 venting channel 16 is provided. The jet regulator 3 has a jet separator 17 which has a plurality of breaker openings 18. This jet splitter 17 deflects the water flowing through to the outside to the housing peripheral wall and divides the water flowing through in individual jets. This jet splitter 17 is designed here as a cup-shaped diffuser, the a transverse to the flow direction of the inflowing water oriented pot bottom 19 which serves as a water deflecting the side baffle surface. On the peripheral wall 20 of this pot shape preferably arranged at regular intervals Zerlegeröffnungen 18 are provided. These burster openings 18 open into an at least partially tapered in the flow direction annular channel 21, wherein the at least one ventilation channel 16 its leading into the housing interior channel opening 22 is disposed in a downwardly adjoining the annular channel 21 portion of the housing inner circumference. Thus, the water flowing to the jet regulator 3, which has already been filtered in the header or filter screen 2 and adjusted in pressure-dependent manner to a defined maximum flow rate in the flow regulator 23, initially impinges on the pot bottom 19 of the jet separator 17 serving as a baffle surface, from there to the outside to be deflected provided in the peripheral wall 20 Zerlegeröffnungen 18. The divided into the Zerlegeröffnungen 18 in individual jets of water then flows into the annular channel 21, which tapers in the flow direction. Due to the cross-sectional constrictions in this region of the jet regulator 3 and the tapered configuration of the annular channel 21, the water flowing through undergoes an increase in velocity, which leads to a negative pressure on the outflow side of the annular channel 21. By this negative pressure ambient air is sucked through the ventilation channels 16 into the housing interior of the jet regulator housing 4. The annular channel 21 is formed between the outside pot circumference of the jet breaker 17 and the inside of an adjacent diffuser ring 15, which is inserted into the jet regulator housing 4. In the mixing zone of the jet regulator housing 4, which is arranged between the jet disintegrator 17 and the grid or network structure, the water flowing through is mixed with the sucked-in ambient air before it is so entangled with air mixed water in the flow holes 7 of the grid or network structure is again formed into a homogeneous, non-spattering and pearly-soft water jet.

LIST OF REFERENCE NUMBERS

1

Sanitary insert unit

2

Attachment or filter screen

3

aerator

4

Flow regulator housing

5

external thread

6

downstream housing end face

7

Flow holes

8th

first sink

9

second dip

10

end-side depression opening of the first recess 8

11

Slot bottom of the second recess 9

12

formation

13

reinforcing ribs

14

Separating or flow guiding walls

15

diffuser ring

16

ventilation duct

17

beam splitter

18

Zerlegeröffnungen

19

pot base

20

Peripheral wall of the jet separator 17

21

annular channel

22

channel opening

23

Flow regulator

24

inner housing peripheral wall

25

outer housing peripheral wall

26

ring seal

Claims (17)

1. Spray regulator (3) having a spray regulator housing (4), which has, on the housing outer circumference thereof, an external thread (5), by means of which the spray regulator (3) can be mounted in an internal thread provided in the water outlet of a sanitary outlet fitting, wherein an outflow-side housing end face (6) of the spray regulator housing (4) is designed as a grid or mesh structure, which has throughflow holes (7) for the water flowing through the spray regulator (3) and which has at least one tool engagement surface designed as a slit-shaped recess (8, 9) in this grid or mesh structure and intended for a turning tool, wherein a second slit-shaped recess (9) is provided in the region of the first recess (8), the second recess likewise being intended as a tool engagement surface, characterized in that the second recess (9) has a smaller recess cross section than the first recess (8) and is provided in the slit base of the first recess (8).
2. Spray regulator according to Claim 1, characterized in that the longitudinal axes of the first recess (8) and of the second recess (9) are arranged approximately in one plane and in that the second recess (9) is arranged approximately centrally in the slit base of the first recess (8) .
3. Spray regulator according to Claim 1 or 2, characterized in that the second recess (9) extends into a protrusion (12) which is formed on the grid or mesh structure on the side facing away from a recess opening (10) of the first recess (8), and in that the protrusion (12) is reinforced by reinforcing ribs (13), which are formed on the protrusion (12) and on the grid or mesh structure and which preferably intersect one another in the extension thereof in the region of the spray regulator longitudinal axis.
4. Spray regulator according to one of Claims 1 to 3, characterized in that the recess cross section of the second recess (9) tapers at least in some region or regions in the direction of the slit base (11) thereof.
5. Spray regulator according to Claim 4, characterized in that the recess longitudinal sides of the second recess (9) extend toward one another in the direction of the slit base (11).
6. Spray regulator according to Claim 4 or 5, characterized in that the recess narrow sides of the second recess (9) extend toward one another in the direction of the slit base (11).
7. Spray regulator according to one of Claims 1 to 6, characterized in that the first recess (8) has a slit base in the form of a circular arc to receive a coin used as a turning tool, rather than for its normal purpose.
8. Spray regulator according to one of Claims 1 to 7, characterized in that the throughflow holes (7) are arranged at a distance from the recess longitudinal and/or from the recess narrow sides of the first recess (8) which is greater than the wall thickness of dividing or flow-guiding walls (14) of the grid or mesh structure, which are arranged between adjacent throughflow holes (7).
9. Spray regulator according to one of Claims 1 to 8, characterized in that the spray regulator (3) has a convexly arched or bulging housing end face.
10. Spray regulator according to one of Claims 1 to 9, characterized in that the outflow-side housing end face is connected integrally to the spray regulator housing (4) or to an outflow-side housing part of the multipart spray regulator housing.
11. Spray regulator according to one of Claims 1 to 10, characterized in that the spray regulator (3) is designed as an aerated spray regulator or as a spray aerator.
12. Spray regulator according to one of Claims 1 to 11, characterized in that the spray regulator housing (4) or the outflow-side housing part has an inner housing circumferential wall (24) and at least one outer housing circumferential wall (25), which surrounds the inner housing circumferential wall (24) with a clearance, and in that at least one air admission passage (16) open to the outflow side of the spray regulator (3) and opening into the interior of the spray regulator housing (4) is provided in the interspace between the inner housing circumferential wall (24) and the adjacent outer housing circumferential wall (25).
13. Spray regulator according to one of Claims 1 to 12, characterized in that the spray regulator (3) has a spray splitter (17) having a plurality of splitter openings (18), which spray splitter (17) deflects the through-flowing water outward and/or divides it into individual jets.
14. Spray regulator according to Claim 13, characterized in that the spray splitter (17) is designed as a pot-shaped diffuser, which has a pot base (19), which is oriented transversely to the throughflow direction of the inflowing water and deflects the water sideways, and has the splitter openings (18), preferably arranged at uniform intervals, on a circumferential wall (20) of this pot shape.
15. Spray regulator according to Claim 13 or 14, characterized in that the splitter openings (18) open into an annular passage (21), which tapers at least in some section or sections in the throughflow direction, and in that the at least one air admission passage (16) has its passage opening (22) leading into the housing interior arranged in the outflow-side region of the annular passage (21) or in a partial region of the housing inner circumference adjoining the annular passage (21) on the outflow side.
16. Spray regulator according to one of Claims 1 to 15, characterized in that the spray regulator is arranged downstream of a flow limiter or a flow control valve (23) in the flow direction and in that the spray regulator (3) and the upstream flow limiter or flow control valve (23) can be connected releasably to one another.
17. Spray regulator according to Claim 16, characterized in that the flow limiter or the flow control valve (23) is interposed between an inflow-side front or filtering screen (2) and the outflow-side spray regulator (3), and in that the front or filtering screen (2), the flow limiter or flow control valve (23) and the spray regulator (3) can be connected releasably to one another to form a sanitary insert.

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