Valve arrangement

A valve system for activating a piston of a piston-cylinder arrangement for a hydraulic or fluid device, the valve system comprising:

• a pilot control valve including a 3/2-way valve;
• and
• a main valve arrangement including a first main valve and a second main valve,
• wherein the first and second main valves include 2/2-way valves,
• wherein in a first position the pilot-control valve is configured to move the first main valve into an open position so as to direct a path for a high pressure fluid to a space above the piston,
• wherein in a second position the pilot-control valve is configured to connect the space to a low-pressure tank so as to relieve a pressure in the space above the piston via the second main valve,
• wherein the pilot-control valve is configured to open the second main valve and configured to close the first main valve,
• wherein the first and the second main valves each include
• a valve body,
• a slide, which is displaceably arranged within the valve body, and
• a plurality of control faces,
• wherein each control face comprises one or more annular surfaces,
• wherein a pressurized fluid is configured to be applied to the plurality of control faces,
• wherein the plurality of control faces include a first control face and a second control face acting on the slide in one direction and a third control face acting on the slide in another direction, such that a sum of a force from the first control face and a force from the second control face is equal to a force from the third control face, and
• wherein each of the plurality of control faces correspond to an actuation element, such that a surface area ratio of the third control face to the second control face of the second main valve is always greater than a surface area ratio of the third control face to the first control face if the first main valve.