Valve for controlling the water flow in a sanitary line

A valve (1) for controlling the water flow in a sanitary line (2), comprising:

• a) a housing (3) having a housing lower part (4) and a housing upper part (5), wherein a water supply channel portion (6) and, downstream thereof, a control channel (7) and a water drain channel portion (8) are arranged in the housing lower part (4),
• characterized in that the control valve (1) additionally comprises:
• b) a valve upper part (9) having a headpiece (10) and a spindle (11), wherein the headpiece (10) is at least partially arranged in a housing bore (12) coaxially to the bore axis (13) thereof, wherein the spindle (11) is arranged so it is radially rotatable in a headpiece bore (14) coaxial to the housing bore (12), and wherein the headpiece (10) comprises a wall (15), which partially encloses the spindle (11) and which is arranged engaging in the control channel (7) of the control valve (1);
• c) a stator disk (16), which is arranged coaxially to the headpiece bore (14) in the control channel (7) and is fastened on the headpiece (10), having at least one through-flow opening (17) penetrating this first valve disk (16) and having a first ceramic surface (18);
• d) a rotor disk (19), which is arranged coaxially to the headpiece bore (14) in the control channel (7) and is engaged with the spindle (11), having at least one through-flow opening (20) penetrating this second valve disk (19) and having a second ceramic surface (21), which is arranged downstream from the stator disk (16), and which lies so it is axially rotatable on the first ceramic surface (18) of the stator disk (16);
• and
• e) an electrical drive (22), which is arranged in the housing upper part (5) and is engaged with the spindle (11) of the valve upper part (9),
• wherein a first circumferential seal (23) of the headpiece (10) presses against a surface (24) of this housing bore (12) to form a seal and a second circumferential seal (25) of the spindle (11) presses against an inner surface (26) of the headpiece bore (14) to form a seal, so that these seals (23, 25) seal off the control channel (7) of the control valve (1) in relation to the housing upper part (5),
• and wherein the headpiece wall (15) comprises at least one window (27) arranged in the region of the control channel (7), which is oriented, opposite to the water drain channel portion (8), toward the surface (24) of the housing bore (12), whereby complete flushing through of the control channel (7) is ensured when the control valve (1) is open.