Position-controlled proportional directional valve

F - Mech Eng,Light,Heat,Weapons – 15 – B

Patent

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Details

137/95

F15B 13/043 (2006.01)

Patent

CA 2031770

The main control piston (8) is controlled hydraulically by pilot control slide valves, operated in each case via two control magnets (4, 6) with force build-up proportional to the control current. In the case of failure of the electrical activation, the valve is always positioned in the centre position by pressure centring and in the case of failure of the pilot control pressure it is positioned in the centre position by spring centring.

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