Drinking and domestic water system and shut-off valve for the same

1 . Drinking and domestic water system with a transfer point ( 22 ) from a public water supply network, a line ( 2 , 4 ) from which at least one ring main ( 10 ; 38 , 40 ) provided with at least one consumer ( 12 ) branches off, wherein the ring main ( 10 ) branches off from the line ( 2 , 4 ) via an outlet opening ( 14 ) and is led back into the line ( 2 , 4 ) via an inlet opening ( 16 ), wherein the line ( 2 , 4 ) and the ring main ( 10 ) are led in parallel and a flow resistance element ( 36 ) is arranged in the line ( 2 , 4 ) between the outlet opening ( 14 ) and the inlet opening ( 16 ), or wherein the ring main ( 38 , 40 ) is led back into a circulation line ( 6 ) via the inlet opening ( 16 ), wherein a single shut-off valve ( 18 , 20 ) which has an actuator ( 44 ) and is arranged between the outlet opening ( 14 ) or the inlet opening ( 16 ) and the ring main ( 10 ) provided with the at least one consumer ( 12 ), and wherein the outlet opening ( 14 ), the inlet opening ( 16 ) and the ring main ( 10 ) are connected to said single shut-off valve.

2 . Drinking and domestic water system according to claim 1 , characterized in that the shut-off valve ( 18 , 20 ) has a housing ( 42 ) which has a first line-side connection ( 58 ) which communicates with the outlet opening ( 14 ), a second line-side connection ( 60 ) which communicates with the inlet opening ( 16 ), a first ring main-side connection ( 62 ) and a second ring main-side connection ( 64 ), wherein the ring main ( 10 ; 38 , 40 ) is connected to the housing ( 42 ) via the ring main-side connections ( 62 , 64 ), and the actuator ( 44 ) is arranged and formed in the housing ( 42 ) such that

in an operating position of the actuator ( 44 ), a first flow path ( 70 ) is formed in the housing ( 42 ), which connects the first line-side connection ( 58 ) to the first ring main-side connection ( 62 ), and a second flow path ( 76 ) is formed, which connects the second line-side connection ( 60 ) to the second ring main-side connection ( 64 );

in a bypass position of the actuator ( 44 ), a first bypass path ( 78 ) is formed in the housing ( 42 ), which connects the first line-side connection ( 58 ) to the second line-side connection ( 60 ) and the first ring main-side connection ( 62 ) and the second ring main-side connection ( 64 ) are shut off.

3 . Drinking and domestic water system according to claim 2 , characterized in that the actuator ( 44 ) is arranged and formed in the housing ( 42 ) such that

in a first one-sided operating position of the actuator ( 44 ), the first flow path ( 70 ) is continuous and the second flow path ( 76 ) is shut off, and

in a second one-sided operating position of the actuator ( 44 ), the second flow path ( 76 ) is continuous and the first flow path ( 70 ) is shut off.

4 . Drinking and domestic water system according to one of claims 2 to 3 , characterized in that the actuator ( 44 ) is of cylindrical shape and is pivotably accommodated in the housing ( 44 ), and in that the connections ( 58 , 60 , 62 , 64 ) and/or formations of the actuator ( 44 ), which form different passages between the connections ( 58 , 60 , 62 , 64 ) depending on the position of the actuator ( 44 ), are arranged essentially in a plane extending transversely to a pivot axis ( 46 ) of the actuator ( 44 ).

5 . Drinking and domestic water system according to claim 2 , characterized in that the actuator ( 44 ) is of cylindrical shape and is pivotably accommodated in the housing ( 42 ), and in that the actuator ( 44 ) has two through holes ( 80 ) arranged one behind the other in a direction extending along the pivot axis ( 46 ) of the actuator ( 44 ), which through holes form the first flow path ( 70 ) or the second flow path ( 76 ) and/or in that the first line-side connection ( 58 ) and the second line-side connection ( 60 ) and/or that the first ring main-side connection ( 62 ) and the second ring main-side connection ( 64 ) are arranged one behind the other in a direction extending along the pivot axis ( 46 ) of the actuator ( 44 ).

6 . Drinking and domestic water system according to claim 2 , characterized in that the actuator ( 44 ) has an expansion element ( 88 ) which is assigned to at least one of the flow paths ( 70 ; 76 ) and by means of which the flow passage through the corresponding flow path ( 70 , 76 ) can be throttled depending on the temperature.

7 . Drinking and domestic water system according to claim 2 , characterized in that the first flow path ( 70 ) is formed with the nominal diameter of the first line-side connection and the first ring main-side connection ( 58 ; 62 ) and the second flow path ( 76 ) is formed with the nominal diameter of the second line-side connection and the second ring main-side connection ( 60 ; 64 ).

8 . Shut-off valve for a drinking and domestic water system according to claim 2 , comprising a housing ( 42 ) having a first line-side connection ( 58 ) communicating with the outlet opening ( 14 ), a second line-side connection ( 60 ) communicating with the inlet opening ( 16 ), a first ring main-side connection ( 62 ) and a second ring main-side connection ( 64 ), and an actuator ( 44 ) arranged and formed in the housing ( 42 ) such that

in an operating position of the actuator ( 44 ), a first flow path ( 70 ) is formed in the housing ( 42 ), which connects the first line-side connection ( 58 ) to the first ring main-side connection ( 62 ), and a second flow path ( 76 ) is formed, which connects the second line-side connection ( 60 ) to the second ring main-side connection ( 64 );

in a bypass position of the actuator ( 44 ), a first bypass path ( 78 ) is formed in the housing ( 42 ), which connects the first line-side connection ( 58 ) to the second line-side connection ( 60 ) and the first and second ring main-side connections ( 62 ; 64 ) are shut off.

9 . Shut-off valve according to claim 8 , characterized in that the actuator ( 44 ) has an expansion element ( 88 ) assigned to at least one of the flow paths ( 70 ; 76 ), by means of which the flow passage through the corresponding flow path ( 70 , 76 ) can be throttled depending on the temperature.

10 . Shut-off valve according to claim 8 or 9 , characterized in that the first flow path ( 70 ) is formed with the nominal diameter of the first line-side and the first ring main-side connection ( 58 ; 62 ) and the second flow path ( 76 ) is formed with the nominal diameter of the second line-side and the second ring main-side connection ( 60 ; 64 ).

11 . Shut-off valve according to claim 8 , wherein:

in a first one-sided operating position of the actuator ( 44 ), the first flow path ( 70 ) is continuous and the second flow path ( 76 ) is shut off, and

in a second one-sided operating position of the actuator ( 44 ), the second flow path ( 76 ) is continuous and the first flow path ( 70 ) is shut off.

12 . Shut-off valve according to claim 8 , wherein

in a ring main bypass position of the actuator ( 44 ), a second bypass path ( 78 ) is formed in the housing ( 42 ), which connects the first ring main-side connection ( 62 ) to the second ring main-side connection ( 64 ), and the first and second line-side connections ( 58 ; 60 ) are shut off.