DE102010005459A1 - Stop valve for terminal of water treatment apparatus at pipe line, has inlet and outlet, where water treatment apparatus is connectable between inlet and outlet - Google Patents

Abstract

The stop valve (10) has an inlet and an outlet (20), where the water treatment apparatus is connectable between inlet and outlet. A ball is provided, which comprises a continuous aperture arranged in the region of the rotating axis, over which a connection is producible between a through hole and a reversing channel. The ball has aperture outside of the rotating axis controlled by a back-flow preventer.

Description

Technical area

• (a) einen Einlass und einen Auslass, wobei das Wasserbehandlungsgerät zwischen Einlass und Auslass anschließbar ist, und
• (b) einen zwischen Einlass und Wasserbehandlungsgerät angeordneten Kugelhahn zum Unterbrechen der Wasserzufuhr zum Wasserbehandlungsgerät,
• (c) wobei der Kugelhahn eine Kugel mit einer Durchgangsbohrung aufweist, welche von einer Betriebsstellung, bei welcher die Durchgangsbohrung eine Verbindung zwischen Einlass und Wasserbehandlungsgerät herstellt, um eine Achse in eine Absperrstellung drehbar ist, bei welcher die Kugel die Verbindung zwischen Einlass und Wasserbehandlungsgerät absperrt.

The invention relates to a shut-off valve for connecting a water treatment device to a pipeline containing

• (A) an inlet and an outlet, wherein the water treatment device is connectable between inlet and outlet, and
• (b) a ball valve arranged between inlet and water treatment device for interrupting the water supply to the water treatment device,
• (c) wherein the ball valve has a ball with a through hole which is rotatable about an axis to a shut-off position from an operating position, wherein the through-hole connects between inlet and water treatment device, in which the ball shuts off the connection between inlet and water treatment device ,

The piped drinking water from a drinking water supply can be treated in a water treatment device. The water treatment device may in particular be an ion exchanger. An ion exchanger must be serviced at regular intervals. For this purpose, the water supply must be interrupted by means of a shut-off valve. The ion exchanger is then removed and regenerated or replaced, for example. During maintenance, no water flows through the pipeline and the consumer has no water available.

Ion exchangers often cause higher water softening than desired. It is therefore desirable to add untreated water to the treated water. The mixing ratio depends on the desired degree of hardness and the degree of hardness of the untreated water. Measuring the conductivity of the water and the volume flow through the ion exchanger provides a good measure of the current degree of hardness of the water. The volume flow can be measured by means of a turbine in the flow channel. If the hardness determined in this way is too high, the proportion of untreated water is reduced. If the determined degree of hardness is too low, the proportion of untreated water is increased.

State of the art

DE 10 2007 059 058 B3 describes a water softening system in which the water to be treated is divided into two partial streams. A first partial flow is softened and mixed again with the second partial flow.

Disclosure of the invention

It is an object of the invention to provide a shut-off valve of the type mentioned, which facilitates maintenance of a water treatment device and allows a division of water into partial streams, so that only a portion of the water flows through the water treatment device.

• (d) die Kugel eine im Bereich der Drehachse angeordnete, ständige Öffnung aufweist, über welche eine Verbindung zwischen der Durchgangsbohrung und einem Umlenkkanal herstellbar ist, der an dem Wasserbehandlungsgerät vorbei zum Auslass führt, und
• (e) die Kugel eine weitere, von einem Rückflussverhinderer kontrollierte Öffnung außerhalb der Drehachse aufweist, über welche in einer Wartungsstellung der Kugel, bei welcher die Durchgangsbohrung keine Verbindung mit dem Wasserbehandlungsgerät hat, eine Verbindung zwischen Einlass und Durchgangsbohrung herstellbar ist.

According to the invention the object is achieved in that

• (D) the ball has a arranged in the region of the axis of rotation, permanent opening, via which a connection between the through-hole and a deflection channel can be produced, which leads past the water treatment device to the outlet, and
• (E) the ball has a further, controlled by a backflow preventer outside the axis of rotation over which in a maintenance position of the ball, wherein the through-bore has no connection with the water treatment device, a connection between the inlet and through-bore can be produced.

In such an arrangement, the flow to the water treatment device can be completely shut off on the one hand. On the other hand, the ball can also be rotated into a maintenance position, in which water still flows into the through hole in the ball. The water flowing into the through-hole can be routed past the permanent opening on the water treatment device. In this way, the consumer is always water available, which is only treated during maintenance. The water flowing through the constant opening can also be used to mix untreated water with the treated water. In this way the degree of hardness at the outlet can be influenced.

Preferably, a leakage monitoring device with a turbine for measuring the volume flow is arranged in the inlet area in front of the ball valve. Such a turbine is needed for the determination of the volume flow. The values for the volume flow are used to determine the degree of hardness. However, the values can additionally be evaluated with a leakage monitoring device in order to determine whether a pipe burst, a permanent leak or the like present unusual flow states. With a suitable circuit, an alarm signal can be generated in unusual flow conditions or the ball valve can be moved to the shut-off, so that no more water flows. The turbine thus works in a dual function: on the one hand, it is used for the detection of leakage and on the other hand for Determination of the degree of hardness. An additional turbine is not required. This saves space and costs.

In a preferred embodiment of the invention, the ball of the ball valve is rotatable with an actuating arrangement which entrains the ball in a first direction and leaves unaffected in the opposite direction. In this case, the actuating arrangement may be formed by two coaxial drive elements, of which a first drive element is fixedly connected to the ball and the second drive element is pressed with a sawtooth in a corresponding profile on the first drive element.

The arranged in the region of the axis of rotation, permanent opening can open into a trimming sleeve having a lateral opening with adjustable cross-section to the deflection channel. The adjustable cross-section can be used to set the volume flow of the untreated water, which is added to the treated water. In this way, the degree of hardness can be adjusted by means of the trimming sleeve.

Preferably, the lateral opening has a variable in the circumferential direction of the Verschneidehülse cross section and the Verschneidehülse is rotatably disposed in an outer sleeve, so that the cross section of the lateral opening is adjustable by rotation.

In a particularly preferred embodiment of the invention, the trimming sleeve is rotatable with an actuating arrangement, which entrains the trimming sleeve in a first direction and leaves unaffected in the opposite direction.

The adjusting arrangement for the trimming sleeve and the drive elements for the ball can be arranged coaxially and have a common drive, wherein the adjusting arrangement for the trimming sleeve entrains the Verschneidehülse in a direction which is opposite to the direction in which the adjusting arrangement for the ball, the ball entraining. With this arrangement, only one motor is needed to drive the ball and to rotate the trimming sleeve. Rotation of the ball is effected by motor rotation in a first direction and rotation of the trimming sleeve by motor rotation in the opposite direction. This additionally ensures that a once set angular position of the Verschneidehülse is not affected when the ball is rotated. This is the case, for example, when the ball is used in the meantime to shut off. The blending ratio is retained.

• (a) zwei Flansche zum Verbinden mit einem korrespondierenden Flansch an der Rohrleitung bzw. an dem Wasserbehandlungsgerät vorgesehen sind,
• (b) wobei das Wasser vom Einlass am rohrseitigen Flansch durch einen zentralen Durchgangskanal zum Wasserbehandlungsgerät und vom Wasserbehandlungsgerät durch einen um den zentralen Durchgangskanal herum angeordneten Ringkanal durch den Auslass zum Rohr fließt,
• (c) die Kugel des Kugelhahns in dem zentralen Durchgangskanal angeordnet ist, der eine Öffnung zum Ringkanal aufweist, die in der Wartungssstellung der Kugel eine Verbindung der Durchgangsbohrung in der Kugel mit dem Ringkanal herstellt.

In a further embodiment of the invention, it is provided that

• (a) two flanges are provided for connection to a corresponding flange on the pipeline or on the water treatment device,
• (b) the water flows from the inlet to the tube-side flange through a central passageway to the water treatment device and from the water treatment device through an annular channel disposed around the central passageway through the outlet to the tube,
• (C) the ball of the ball valve is disposed in the central passage having an opening to the annular channel, which connects the through hole in the ball with the annular channel in the maintenance position of the ball.

Such flange connections are known. They have the advantage that the water treatment device or the shut-off valve can be removed without having to break the pipe. The coaxial arrangement of the central through-channel and the outer annular channel has the advantage that a deflection opening can be realized without much effort, for example, through a bore between through-channel and annular channel. Such an additional hole is useful if in case of maintenance much water should flow through the shut-off valve untreated to the outlet.

Preferably, at least one backflow preventer is on the outlet side, which prevents a flow from the outlet in the direction of the water treatment device.

Embodiments of the invention are the subject of the dependent claims. An embodiment is explained below with reference to the accompanying drawings.

Brief description of the drawings

1 is a perspective view of a shut-off valve for connecting a water treatment device to a pipeline.

2 is a cross section through the shut-off valve off 1 in operating position across the pipeline.

3 is a cross section along the section line AA in 2 and shows the shut-off valve 1 and 2 in operating position.

4 is a cross section through the shut-off valve off 1 in maintenance position across the pipeline.

5 is a cross section along the section line AA in 4 and shows the shut-off valve 4 in maintenance position.

6 is a cross section through the shut-off valve off 1 in shut-off position across the pipeline.

7 is a cross section along the section line AA in 6 and shows the shut-off valve 6 in closed position.

8th is an exploded view of the adjusting arrangements for adjusting the ball position and the Verschegegrads in detail.

9 is a cross section through the arrangements 8th ,

10 is a side view of the arrangements 8th and 9 ,

11 is a perspective view of the inner coupling sleeve.

12 is a cross section through the inner coupling sleeve.

13 is a perspective view of the turbine sleeve.

14 is an exploded view of the leakage protection and flow measuring device.

15 is a cross section through the arrangement 14 ,

Description of the embodiment

1 shows a general with 10 designated shut-off valve for connecting a water treatment device (not shown) to a pipeline. In the present embodiment, the water treatment device is an ion exchanger. In the pipeline is a connection piece 12 with a parallel to the pipe axis 16 extending connection flange 14 Installed. The drinking water flowing through the pipeline from a drinking water supply flows in the inner area 18 ( 2 ) from the connection flange 14 in the shut-off valve 10 , The treated drinking water flows in the outer area 20 from the shut-off valve 10 back through the connector 12 into the pipeline.

The shut-off valve 10 has a corresponding connection flange on the pipe side 22 on. On the connection flange 22 opposite side of the shut-off valve 10 is a parallel connecting flange 24 intended. The drinking water also flows there in the inner area 26 in the water treatment device. The treated drinking water flows out of the water treatment device through two inputs located in the outer area 28 and 30 in the connection flange 24 back to the shut-off valve 10 , The inputs 28 and 30 lead into a ring channel 32 , The ring channel 32 is with the outer area 20 in the connection flange 14 connected is. In 3 is recognizable that the area 20 with the outlet 34 of the connector 12 connected is. The inlet 42 leads over the inner area 18 in the entrance of the shut-off valve 10 ,

The shut-off valve 10 points between the areas 18 and 26 a central passageway 36 on. In the central passageway 36 is a backflow preventer 38 and the ball 40 arranged a ball valve. The ball 40 is about an axis 46 movable and is powered by a motor 44 driven. In the entrances 28 and 30 of the ring channel 32 are backflow preventers 48 and 50 arranged. This is in 2 to recognize.

2 and 3 show the ball valve in passage position. This is the operating position. The ball 40 has a center hole 52 on. In the in 2 and 3 shown position aligned the center hole 52 with the central passageway 36 in the shut-off valve 10 , In this position, the water flows from the pipeline through the backflow preventer 38 and part of the water then through the center hole 52 through the shut-off valve 10 directly to the water treatment device. From there, the water flows through the ring channel 32 back to the pipeline.

In ion exchangers, the water is completely softened. This is undesirable in some cases. Part of the water can be directed untreated in the present arrangement on the water treatment device directly to the output. Only the remainder of the water will continue to be directed to the water treatment device. For this purpose, an additional deflection channel is provided. In this way a partial softening is achieved.

In the ball 40 is perpendicular to the center hole 52 parallel to the axis of rotation 46 another opening 56 intended. Through this opening 56 and an opening in the wall 60 between ring channel 32 and passageway 38 Water enters the bore in the deflection position 62 an inner trimming sleeve 64 , The inner trimming sleeve 64 has a triangular, lateral opening 66 on. This is in 2 shown. The inner trimming sleeve 64 sits freely rotatable in an outer Verschneidehülse 68 , The outer trimming sleeve also has lateral openings 70 with intervening ribs on. Depending on the angular position, the lateral opening overlap 66 in the inner trimming sleeve 64 and the openings 70 in the outer Verschneidehülse 68 more or less. Due to the angular position of the blanking sleeves, the flow cross section through the opening 66 be set.

The openings 66 and 70 open to a deflection channel 72 , The deflection channel 72 is with the ring channel 32 connected. Water passing through the deflection channel 72 in the ring channel 32 remains untreated and dilutes the treated water treatment device in accordance with the water through the openings 66 and 70 certain flow cross-section.

The water treatment device is usually serviced regularly. For example, in an ion exchanger, the contained ion exchange material must be exchanged or regenerated. For maintenance of the water treatment device, the inflow to the water treatment device must be turned off. So that water is still available at the taps, the flow can be completely through a hole 58 in the wall 60 between the ring channel 32 and the passage 36 be steered past the water treatment device. For this purpose, the in 4 and 5 shown maintenance position provided.

The maintenance position is achieved by the ball 40 of the ball valve at an angle of 90 degrees around the axis 46 is turned. In the ball 40 is another backflow preventer 54 transverse to the center hole 52 arranged. In the maintenance position in 4 and 5 Aligns the backflow preventer 54 with the backflow preventer 38 in the passageway 36 , Both backflow preventers 38 and 54 then open in the same direction. The water can thus continue in the center hole 52 enter. The center hole 52 is in the turning position to the area 26 closed so that no drinking water can enter there in the water treatment device. However, it can continue through the deflection channel 72 or through the hole 58 flow into the outer ring channel. From there it gets to the exit and remains untreated remains available.

The backflow preventer already described 48 and 50 Avoid water flowing back from the outlet towards the water treatment device. The backflow preventers 48 and 50 are accordingly in the entrances 28 and 30 to the ring channel 32 arranged to pass a flow from the water treatment device in the direction of the annular channel. An opposite flow from the annular channel 32 in the direction of the water treatment device is blocked. The backflow preventer 54 is arranged inside the ball such that only a flow into the ball is possible.

In the in 4 and 5 shown maintenance position, the water treatment device is not flowed through and can be removed without interrupting the water supply.

With the shut-off valve 10 Finally, the water supply can be completely interrupted. This is particularly necessary if leakage, a pipe break or the like occurs. Then the ball valve of the shut-off valve 10 by a further rotation of the ball 40 90 degrees around the axis 46 placed in a closed position in the 6 and 7 is shown. In this position, the ball closes 40 the passage 36 behind the input-side non-return valve 38 Completely. There is no water in the interior of the sphere 40 penetration. Accordingly, both the connection to the water treatment device and the deflection channel is disconnected from the water supply.

The shut-off valve is used to monitor the flow for leakage and pipe breakage 10 a leakage monitoring function. The components required for this function are in 14 and 15 shown in detail. The input-side backflow preventer 38 is designed as a backflow preventer cartridge. The backflow preventer 38 is in a sleeve 74 which is in an insert 76 is plugged in. The insert part 76 forms with an inlet-side edge 78 and a seal 80 a valve seat for the backflow preventer 38 ,

Between the backflow preventer 38 and the sleeve 74 is a gap 82 educated. The sleeve 74 is fixed with a turbine 84 connected. The sleeve 74 is in 13 shown separately again. It can be seen that the sleeve 74 own blades in the edge area 130 having. To the backflow preventer 38 around are the shovels 86 the turbine 84 in the gap 82 arranged. The turbine 84 is in a housing-proof warehouse 88 stored. The warehouse 88 has openings 90 through which the water can flow.

The entire assembly is in the insert part 76 arranged. The insert is in the inlet area of the shut-off valve 10 plugged in and with seals against the housing 92 sealed. This is for example in 6 to recognize.

In the inward edge 78 the insert part is a bypass opening 94 intended. The bypass 94 leads to the backflow preventer 38 over and lets through a small flow share. The through the bypass 94 Through-flow has a comparatively high flow velocity due to the small cross-section. This flow is on the blades 130 the sleeve 74 directed. The sleeve 74 and the turbine are sitting coaxial in the flow channel. The turbine with the sleeve is thus driven even at low flow rates. For larger flow rates opens the backflow preventer 38 and drives the turbine 84 at. The entire flow thus flows through the bypass and in the middle through the backflow preventer or only through the bypass. The turbine thus rotates at any flow.

The turbine has a magnet on a blade. This magnet operates in a known manner with a reed contact 96 together. The reed contact generates an electrical signal, which is a measure of the number of revolutions of the turbine and the rotational speed. This can then be used together with the fixed sizes of the turbine dimensions to determine the flow rate and the volume flows.

A suitable evaluation circuit is programmed for leakage protection. It provides a signal when leakage occurs. This is the case, for example, if very large volume flows occur within a very short time or if volume flows occur continuously over a long period of time - even at times when no volume flows usually occur (at night).

When the evaluation of the electrical signal shows that leakage occurs, a control signal for controlling the motor 44 generated. The motor 44 is then actuated so that the ball valve in the shut-off position ( 6 and 7 ) is brought.

The coupling of the motor shaft of the motor 44 with the ball 40 the ball valve is made with an arrangement that in the 8th . 9 and 10 is shown in more detail.

The above-mentioned outer Verschneidehülse 68 is positively connected to the ball via a tongue and groove connection 40 connected. The inner trimming sleeve 64 is freely rotatably mounted in the outer Verschneidehülse and with seals 98 . 100 sealed against this.

The outer trimming sleeve 68 indicates a profile on the engine-facing upper edge 102 on. The profile 102 is in 8th particularly easy to recognize. The profile 102 is essentially sawtooth. In the profile 102 picks up a corresponding profile 106 at the bottom of an outer coupling sleeve 104 , In the outer coupling sleeve 104 sits an inner coupling sleeve 108 , The inner coupling sleeve 108 has longitudinal ribs on the outside 110 on, which extend in the axial direction. The longitudinal ribs 110 engage in longitudinal ribs, which on the inner wall of the outer coupling sleeve 104 are provided (not shown). The inner and outer coupling sleeve thus always have the same angular position, but are arranged against each other displaceable in the axial direction.

The inner coupling sleeve 108 has similar to the outer coupling sleeve 104 at the bottom of a sawtooth profile 112 on. The profile 112 engages in a corresponding profile 114 at the engine facing upper end of the inner trimming sleeve 64 ,

The inner coupling sleeve 108 is in 11 and 12 again shown separately in detail. The inner coupling sleeve 108 has an open towards the engine, deep groove 114 on. In the ring groove 114 sits an inner spring 116 , The outer coupling sleeve 104 has an open towards the engine, deep groove 118 on. In the ring groove 118 sits an outer spring 120 , The feathers 116 and 120 are supported on a housing at the upper end 122 off, as for example in 6 is recognizable. In this way, the inner and the outer coupling sleeve 104 and 108 down in the direction of the trimming sleeves 64 respectively. 68 pressed.

The inner coupling sleeve 108 is positively connected to the motor shaft of the motor 44 connected. The outer coupling sleeve 104 is over the ribs 110 positive fit with the inner coupling sleeve 108 connected. Accordingly, both coupling sleeves follow 108 and 104 the movement of the motor shaft. The sawtooth profile 112 the inner coupling sleeve 108 and the freely rotatable inner Verschneidehülse 64 are formed such that the inner Verschneidehülse 64 a rotational movement of the inner coupling sleeve 108 only following in one direction. In the other direction, the profile slips 112 along the flat part of the profile 114 without a rotational movement of the inner Verschneidehülse 64 trigger. The inner coupling sleeve moves 108 around a tread depth in the axial direction. By the spring force of the spring 116 becomes the inner coupling sleeve 108 however, at any time on the inner trimming sleeve 104 pressed.

In the present embodiment, the inner Verschneidehülse follows 64 a rotational movement in the counterclockwise direction. A rotation of the inner coupling sleeve 108 clockwise affects the angular position of the inner trimming sleeve 64 Not. About a rotational movement of the motor shaft counterclockwise thus can the position of the opening 66 and thus the desired degree of hardness of the water can be set at the outlet of the valve.

The profiles 106 and 102 on the outer trimming sleeve 68 and the outer coupling sleeve 104 work on the same principle as the Profiles on the inner trimming sleeve 64 and the inner coupling sleeve 108 , Here are the profiles 102 and 106 however, designed so that rotation of the motor shaft only in the opposite direction to the outer Verschneidehülse 68 is transmitted. The outer trimming sleeve 68 is, as already stated, positively with the ball 40 connected. Movement of the motor shaft clockwise results in movement of the outer coupling sleeve 104 and the outer trimming sleeve 68 to a movement of the ball 40 clockwise. When the motor shaft moves counterclockwise, the ball remains 40 unaffected.

With the described arrangement, therefore, the degree of hardness can be adjusted by a movement of the motor shaft counterclockwise. The input hardness is determined by means of a conductivity sensor 128 determined from the bottom through the ball into the interior of the ball 40 extends. The ball movement can be achieved independently with the same motor when the motor shaft is moved in reverse. A once set hardness, represented by the angular position of the inner Verschneidehülse 64 , remains accordingly also then, if the ball 40 is moved in the meantime about for maintenance purposes or in case of leakage in another position.

The outer coupling sleeve 104 has projections on the outside 124 on. The projections 124 are about the height of the outer coupling sleeve 104 distributed. microswitch 126 for example, in 6 can be seen, detect the position of the projections 124 and thus the angular position of the coupling sleeves 104 and 108 , About a suitable circuit, the motor can be driven in accordance with exactly in the situation in which the three different positions of the ball 40 - Operating position, maintenance position and shut-off - to be achieved. The degree of hardness can also be adjusted via this circuit and a suitable evaluation. It will be understood that the directions of the assembly can also be reversed and the ball follows a counterclockwise movement and the inner shimming sleeve follows a clockwise movement without any difference.

The shut-off valve described realizes a variety of functions in one arrangement: leakage protection, shut-off, maintenance and adjustment of the degree of hardness or degree of mixing of treated and untreated water. For this purpose, only one motor and only one ball valve is used. The arrangement is therefore compact, easy to install and inexpensive to manufacture.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• DE 102007059058 B3 [0004]

Claims (10)

Shut-off valve ( 10 ) for connecting a water treatment device to a pipeline comprising (a) an inlet ( 18 ) and an outlet ( 20 ), wherein the water treatment device is connectable between inlet and outlet, and (b) a ball valve arranged between inlet and water treatment device for interrupting the water supply to the water treatment device, (c) wherein the ball valve is a ball ( 40 ) with a through hole ( 52 ), which of an operating position ( 2 and 3 ), in which the through-bore establishes a connection between inlet and water treatment device, about an axis ( 46 ) in a shut-off position ( 6 and 7 ), in which the ball shuts off the connection between the inlet and the water treatment device, characterized in that (d) the ball ( 40 ) one in the region of the axis of rotation ( 46 ), having a permanent opening, via which a connection between the through hole and a deflection channel ( 62 . 66 . 72 ) can be produced, which passes the water treatment device to the outlet ( 20 ), and (e) the ball ( 40 ) another, from a backflow preventer ( 54 ) controlled opening outside the axis of rotation ( 46 ), via which in a maintenance position ( 4 and 5 ) of the ball, in which the through hole ( 52 ) has no connection with the water treatment device, a connection between inlet and through hole can be produced. Shut-off valve according to claim 1, characterized in that in the inlet area in front of the ball valve, a leakage monitoring device with a turbine ( 74 . 84 ) is arranged to measure the volume flow. Shut-off valve according to one of the preceding claims, characterized in that the ball ( 40 ) of the ball valve with an actuating arrangement ( 68 . 104 ) which rotates the ball in a first direction and leaves it unaffected in the opposite direction. Shut-off valve according to claim 3, characterized in that the actuating arrangement of two coaxial drive elements ( 68 . 104 ) is formed, of which a first drive element ( 68 ) firmly with the ball ( 40 ) and the second drive element ( 104 ) with a sawtooth profile ( 106 ) into a corresponding profile ( 102 ) is pressed on the first drive element. Shut-off valve according to one of the preceding claims, characterized in that in the region of the axis of rotation ( 46 ), permanent opening in a trimming sleeve ( 64 ), which has a lateral opening ( 66 ) with adjustable cross section to the deflection channel ( 72 ) having. Shut-off fitting according to claim 5, characterized in that the lateral opening ( 66 ) in the circumferential direction of the trimming sleeve ( 64 ) has variable cross section and the Verschneidehülse in an outer sleeve ( 68 ) is rotatably arranged so that the cross section of the lateral opening is adjustable by rotation. Shut-off fitting according to claim 6, characterized in that the trimming sleeve ( 64 ) with an actuating arrangement ( 108 ) is rotatable, which the Verschneidehülse ( 64 ) in a first direction and leaves unaffected in the opposite direction. Shut-off valve according to claim 7, characterized in that the actuating arrangement ( 108 ) for the trimming sleeve ( 64 ) and the drive elements ( 104 . 68 ) for the ball ( 40 ) are arranged coaxially and a common drive ( 44 ), wherein the adjusting arrangement for the trimming sleeve entrains the Verschneidehülse in a direction which is opposite to the direction in which the adjusting arrangement for the ball entrains the ball. Shut-off valve according to one of the preceding claims, characterized in that (a) two flanges are provided for connection to a corresponding flange on the pipeline or on the water treatment device, (b) the water flows from the inlet on the tube-side flange through a central passageway to the water treatment device and from the water treatment device through an annular channel disposed around the central passageway through the outlet to the tube, (C) the ball of the ball valve is disposed in the central passage having an opening to the annular channel, which connects the through hole in the ball with the annular channel in the maintenance position of the ball. Shut-off valve according to one of the preceding claims, characterized in that at least one backflow preventer is provided on the outlet side, which prevents flow from the outlet in the direction of the water treatment device.

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