SYR Backflow Preventer 6610 LF DN20, R 3/4

The BA 6610 In-line backflow preventer is a compact protection device according to DIN EN 1717, group B, with controlled separation (three-chamber system). It corresponds to the installation type BA defined therein and can therefore be used for protection up to and including fluid category 4. Its purpose is to prevent back-siphonage or backflow of non-potable water into the public potable water supply network. The BA backflow preventer covers a wide range of applications (e.g., printing plants, chemical and food processing plants, laboratory and medical technology).
The BA 6610 backflow preventer contains all components specified in DIN EN 1717 and is designed as a 3-chamber system with controllable upstream, mid-pressure, and downstream zones. Additionally, it is equipped with an integrated strainer. Each pressure zone is fitted with ball valves, allowing for control of the safety devices through pressure measurement. The backflow preventer consists of 2 check valves (RV) connected in series, which are equipped with a vented mid-zone. If no water is drawn, the inlet and outlet side RVs, as well as the drain valve, are closed. In case of back-siphonage, the inlet pressure drops. The drain valve opens at the latest when the differential pressure between the upstream and mid-pressure chambers has dropped to 0.14 bar.
Technical data:
Operating pressure: max. 10 bar
Operating temperature: max. 65 °C
Installation position: horizontal, funnel connection downwards
Medium: potable water
Flow rate: 5.1 m³/h at Δp 1.5 bar.
Connection size: DN 20