Stopping Contaminated Water Reaching Public Mains

Honeywell has launched its BA295 series of compact backflow preventers, which is claimed to ensure that contaminated water cannot flow back in to the public mains supply.

Honeywell has launched its BA295 series of compact backflow preventers, which is claimed to ensure that contaminated water cannot flow back in to the public mains supply.

The preventer uses the RPZ (reduced pressure zone) principle, featured in Honeywell's existing products but a thorough product redesign has simplified servicing and minimises spares holding claimed the company.

The BA295 series protects mains water systems against back pressure, back flow and back syphonage to comply with relevant water regulations.

Fluids up to and including liquid category 4 (toxic, very toxic, carcinogenic and radioactive substances) to EN 1717 are protected claimed Honeywell.

That corresponds to construction type 2 to EN 1717.

Honeywell believes that the valves provide an alternative to providing an air gap - traditionally achieved by header tanks - to isolate water systems.

They feature triple security to provide protection against back pressure and back siphonage: two check valves and a discharge valve divide the unit into three chambers, each providing a separate pressure zone.

There is unrestricted access to all internal components and the discharge valve is mounted on the underside for maintenance said the company.

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