VALVE CARTRIDGE AND UNLOCKING CHECK VALVE FOR A PROP OF A MECHANIZED SUPPORT UNIT COMPRISING A VALVE CARTRIDGE

摘要

A cartridge has a valve piston, a control piston and a piston spring, where the pistons and the spring are arranged in cartridge housings. The end of the valve piston is adjustably accommodated in the control piston. The control piston has an auxiliary piston and a flow opening.