Valves - Misc. - BF SERIES 20 - 40 - 70 (PATENTED) The monoblock valves of the BF series derived from the BM series, and differ from them by having at the inlet a 3 - ways priority integrated and pressure compensated flow regulator. The exceeding flow is recuperated into the system and allows the simultaneous use of two spools, the first ruled by the priority (P) and the second by the exceeding flow (EF). An important particularity is that the flow regulator only works when a priority element is actuated. On the contrary the oil goes to tank without the regulator being actuated, therefore without loss of flow and unnecessary heating. The other elements get the whole flow when they are individually operated, and the exceeding flow only when a priority element is working. One or more priority elements are available (up to 6 banks).