SYR backflow preventer 6610 LF DN50, R 2

The BA 6610 In-line system disconnector is a compact backflow prevention device in accordance with DIN EN 1717, Group B, with controlled separation (three-chamber system). It complies with 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 system disconnector covers a wide range of applications (e.g. printing companies, chemical and food processing plants, laboratory and medical technology).
The BA 6610 system disconnector contains all components specified in DIN EN 1717 and is designed as a 3-chamber system with controllable upstream, midstream, and downstream pressure zones. It is also equipped with an integrated strainer. Each pressure zone is fitted with ball valves, enabling the safety devices to be checked by pressure measurement. The system disconnector consists of 2 non-return valves (NRVs) connected in series, which are equipped with a ventilatable intermediate zone. If no water is drawn, the inlet and outlet NRVs and the drain valve are closed. In the event of back-siphonage, the inlet pressure drops. The drain valve opens at the latest when the differential pressure between the upstream and midstream chambers has fallen 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: 31.8 m³/h at Δp 1.5 bar.
Connection size: DN 50