Abstract: A pressure reducer includes a housing, defining upstream and downstream pressure chambers. A valve is in the housing and includes a diaphragm acting on a valve tappet. The valve includes a valve body fastened to the valve tappet and cooperating with a sealing element. The valve body has a cylindrical, hollow-cylindrical, or conical contour and forms a sealing surface effective in the radial direction. The sealing surface is interrupted at least one circumferential position by a flow channel, such that, depending on a pressure drop in the downstream pressure chamber, either the sealing element lies against the sealing surface and completely closes a flow region between the sealing element and the sealing surface or the sealing element is removed from the sealing surface and completely opens the flow region or the sealing element lies against the sealing surface and partly opens the flow region exclusively by the respective flow channel.

Abstract: A pressure reducer includes a housing, defining upstream and downstream pressure chambers. A valve is positioned in the housing and includes a diaphragm acting on a valve tappet. The valve includes a valve body fastened to the valve tappet and cooperating with a sealing element. The valve body has a cylindrical, hollow-cylindrical, or conical contour and forms a sealing surface effective in the radial direction. The sealing surface is interrupted at at least one circumferential position by a flow channel, such that, depending on a pressure drop in the downstream pressure chamber, either the sealing element lies against the sealing surface and completely closes a flow region between the sealing element and the sealing surface or the sealing element is removed from the sealing surface and completely opens the flow region or the sealing element lies against the sealing surface and partly opens the flow region exclusively by the respective flow channel.

Abstract: A pressure reducer includes a housing, defining upstream and downstream pressure chambers. A valve is positioned in the housing and includes a diaphragm acting on a valve tappet. The valve includes a valve body fastened to the valve tappet and cooperating with a sealing element. The valve body has a cylindrical, hollow-cylindrical, or conical contour and forms a sealing surface effective in the radial direction. The sealing surface is interrupted at at least one circumferential position by a flow channel, such that, depending on a pressure drop in the downstream pressure chamber, either the sealing element lies against the sealing surface and completely closes a flow region between the sealing element and the sealing surface or the sealing element is removed from the sealing surface and completely opens the flow region or the sealing element lies against the sealing surface and partly opens the flow region exclusively by the respective flow channel.

Abstract: Assembly (10) for measuring a leakage in a drinking water supply system, with a backflow preventer (12), wherein the backflow preventer (12) is opened if there is a pressure drop caused by drinking water consumption downstream of the backflow preventer (12) as viewed in a flow direction of the drinking water, and wherein the backflow preventer (12) is closed if there is no pressure drop caused by drinking water consumption downstream of the backflow preventer (12), as viewed in the flow direction of the drinking water, with a volume flow meter (13) connected in parallel to the backflow preventer (12) and via which, if the backflow preventer (12) is closed, a leakage flow of drinking water caused by a leakage in the drinking water supply system downstream of the backflow preventer (12) can be routed, wherein the volume flow meter (13) is integrated into a bypass (14) to the backflow preventer (12).

Abstract: Assembly (10) for measuring a leakage in a drinking water supply system, with a backflow preventer (12), wherein the backflow preventer (12) is opened if there is a pressure drop caused by drinking water consumption downstream of the backflow preventer (12) as viewed in a flow direction of the drinking water, and wherein the backflow preventer (12) is closed if there is no pressure drop caused by drinking water consumption downstream of the backflow preventer (12), as viewed in the flow direction of the drinking water, with a volume flow meter (13) connected in parallel to the backflow preventer (12) and via which, if the backflow preventer (12) is closed, a leakage flow of drinking water caused by a leakage in the drinking water supply system downstream of the backflow preventer (12) can be routed, wherein the volume flow meter (13) is integrated into a bypass (14) to the backflow preventer (12).