antibackflowvoorziening

An anti-backflow valve, commonly referred to as a check valve, is a device installed in piping systems to permit fluid flow in a single direction and prevent reverse flow. Its primary purpose is to protect clean supplies from contamination, maintain system pressure, and prevent damage that can result from backflow.

Most anti-backflow valves operate automatically. They contain a closure member—such as a disc, ball, or swing gate—that moves with the direction of forward pressure to open, and seals when reverse pressure appears. Some designs are spring-loaded to respond quickly and reduce the risk of backflow-related issues.

Common designs include swing check valves, tilting-disc valves, lift valves, and ball-check valves. Each type offers different pressure ratings, cruising ranges, and responses to changing flow conditions. Materials vary by application and can include brass, stainless steel, cast iron, or various plastics.

Applications span many sectors. They are widely used in potable water systems, heating and cooling installations, fuel and gas lines, wastewater and chemical processing, and medical or dental water lines where backflow could pose health risks. They are often employed to protect water supplies from cross-connections and to safeguard equipment and processes from reverse flow.

Advantages of anti-backflow valves include simple operation, low maintenance, and a cost-effective means of preventing backflow. Limitations can include the potential for chatter or seat wear, pressure drops across the valve, and occasional blockage by debris. Regular inspection and adherence to applicable codes and standards are recommended.

Standards and installation requirements vary by jurisdiction, but many regions require appropriate backflow prevention measures at cross-connections to safeguard drinking water and other critical systems.