Patent attributes
A proportional pressure-regulating valve (1) includes a valve housing (3) having pump, utility and tank connections (P, A, T). A regulating piston (5) is longitudinally displaceable within the valve housing (3) to selectively connect the pump connection (P) to the utility connection (A) and the utility connection (A) to the tank connection (T) and is controllable by a magnetic coil device (7). The regulating piston (5) has a surface ratio (9) such that pressure on the utility connection (A) generates a counter force (FG) against the magnetic force (FM) of the magnetic coil device (7), moving the regulating piston (5) back and causing reduction of pressure medium from the pump connection (P) to the utility connection (A) until the pressure acting on the utility connection (A) corresponds to the magnetic force (FM) of the current signal applied to the magnetic coil device (7).
