公开(公告)号：US10774851B2

公开(公告)日：2020-09-15

申请号：US16063287

申请日：2016-12-16

申请人： WALVOIL S.P.A.

发明人： Ulderico BUSANI ,  Daniele Dodi ,  Massimiliano Musiani

IPC分类号： F15B11/17

摘要： A modular directional valve with two or more elements (E1, E2, E3, E4) in turn connectable to respective utilities (U) through the uses (A1, B1, A2 . . . B4); of which one or more elements (E1 E2) are of the CA type while one or more elements are of LS flow sharing type (E3, E4). The valve designed to be connected to a first high pressure line P1 which connects the crossing elements to a constant displacement pump (PA) and a second high pressure line P2 which connects the LS flow sharing type elements to a variable displacement pump LS, the connection to a low pressure line, the connection to a load sensing signal line (LS2) with the variable displacement pump LS (PB). Said valve acting so that if the load sensing flow sharing elements (E3, E4) fed by the line (P2) designed for the connection with the pump (PB) are in saturation, it withdraws from the carry over (6) of the group of elements (E1, E2) of the crossing type the amount of flow rate equal to the difference between the flow rate required by the utilities (U) of the elements (E3, E4) and the maximum flow rate which can be supplied by the LS pump (PB); otherwise, it freely delivers the flow rate of the constant displacement pump to the low pressure line.