Backflow Preventer Type BA
The backflow preventer BA are in the process of different national certifications and are designed to protect drinking water systems from contamination by polluted liquids which do not present toxic or microbiological risks to human health as defined by the health authorities.
The backflow preventer BA is composed by 3 zones : upstream, middle and downstream chamber, each chamber is fitted with pressure plug.
Two independent non return devices which separate the middle zone (reduced pressure zone) from each other zone, normally closed when no water.
A discharge device (evacuation to waste) linked to the middle chamber, normally closed when no water.