A regulating valve, in particular an electroproportional pivot-angle regulator for a variable-displacement pump, includes a piston bore formed in a valve housing and a regulating piston guided in the piston bore. The regulating piston is configured to be actuated in an adjusting direction via an actuator, in particular via a lifting magnet. The regulating piston is acted upon in the opposite direction by a spring force of a counterspring. The counterspring is supported via a spring plate on a supporting spring which is supported on the valve housing. The spring plate is tensioned between the supporting spring and an adjusting device by which the spring plate is configured to be displaced in relation to the valve housing in or opposite to the adjusting direction.