Proportional pressure-regulating valve

A proportional pressure-regulating valve (10) for controlling a first fluid connection (f1) from a working connection (A) to a tank connection (T) and a second fluid connection (f2) from a supply connection (P) to the working connection (A), comprising:

• a valve housing (12) having a working connection (A), the tank connection (T) and the supply connection (P),
• a regulating piston (14) guided displaceably in the valve housing (12), which opens the first fluid connection (f1) from the working connection (A) to the tank connection (T) and closes the second fluid connection (f2) from the supply connection (P) to the working connection (A) when in at least one first position, and which closes the first fluid connection (f1) and opens the second fluid connection (f2) when in at least one second position,
• a restoring device (18), which holds the regulating piston (14) in the direction of the respective first position, and
• an actuating device (16), which displaces the regulating piston (14) against the restoring force of the restoring device (18) in the direction of the respective second position,
• characterized in that the regulating piston (14) is displaceable from the respective first position to at least one third position by the total differential pressure produced when fluid flows through, and
• in the respective third position of the regulating piston (14), the first fluid connection (f1) is opened with an enlarged opening cross section compared to the respective first position and the second fluid connection (f2) remains closed.