SYR Backflow Preventer 6610 LF DN25, R 1

The system disconnector BA 6610 In-line is a compact backflow prevention 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 network. The system disconnector BA covers a variety of applications (e.g., printing plants, chemical and food processing plants, laboratory and medical technology).
The system disconnector BA 6610 includes all components specified in DIN EN 1717 and is designed as a 3-chamber system with controllable upstream, intermediate, and downstream pressure zones. Additionally, it is equipped with an integrated strainer. Each pressure zone is fitted with ball valves, thus enabling control of the safety devices by pressure measurement. The system disconnector consists of 2 series-connected backflow preventers (BP) which are equipped with a vented intermediate zone. If no water is drawn, the inlet and outlet side BPs, 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 intermediate 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: 7.9 m³/h at ?p 1.5 bar.
Connection size: DN 25