Electro-hydraulic control circuit and method of its deactivation

摘要

The device has working lines, and load holding valves (LA, LB) in each working line. Each load holding valve is switched from a load holding position for opening respective working lines to a return system. A circulation switching assembly (U) is formed between a pressure source and the return system. Each load holding valve is designed as a 2/2-directional solenoid seat valve, which is switched open towards a return system.