The Barberi® hydraulic separators also called hydraulic compensators are used to make two circuits hydraulically independent from each other: for example the heating generator on one side (primary circuit) and the distribution system on the other side (secondary circuit). In this way, the two circuit pumps work at their best as the two circuits were totally independent, thus avoiding reciprocal interference. These devices are equipped with connections for air vents, drain valves and temperature probes. The separators are built with profiled stainless steel parts, then welded and coated with a black protective paint. The separators are also supplied with shell made of isolating material to limit thermal losses. The 22M.01 separator has inside two bulkheads that help the air evacuation and sludge decantation.