Effective for the cross-connection of domestic water supply pipelines, it can effectively prevent and isolate contaminated water from backflowing into drinking water, with a head loss of less than 0.03 MPa. During backflow (when outlet pressure is higher than inlet pressure), the intermediate chamber acts as an air barrier; hydraulic control ensures compliance with hygiene and safety standards for water-related products; it has a low failure rate and is easy to maintain.

The air is isolated in the middle chamber, and the pressure of the middle chamber is zero when reflux.

The inlet check valve seals the forward pressure difference, which is greater than 0.7m water column.

The outlet check valve seals the forward pressure difference, which is greater than 0.35m water column

The circulation resistance of the whole machine is 0.03mpa.

Main Overall Dimensions Unit：mm