Valve

A valve, comprising:

• a main piston for actuating a main volumetric flow;
• and
• a pilot piston for actuating a pilot volumetric flow;
• wherein
• the main piston and pilot piston are guided so as to be longitudinally movable in a valve housing;
• wherein
• the pilot piston can be actuated using a solenoid device;
• wherein
• the position of the main piston can be adjusted using a pilot piston in that a fluid pressure acting on the main piston is signalled into a pilot chamber with the pilot piston via a fluid connection, which pilot piston, when an actuated solenoid device is in an actuating position, holds the main piston in its closed position preventing the main volumetric flow;
• wherein,
• when the solenoid device is not actuated, the pilot piston is in a starting position in which the fluid pressure, decoupled from the pressure supply via the main piston, in the pilot chamber decreases towards the tank side until the main piston reaches an open position which controls the main volumetric flow;
• and wherein
• the solenoid device has a pull-type actuating solenoid which, when energized, moves the pilot piston from its starting position to its actuating position in which the main piston is held in its closed position.