Hydraulic control valve for controlling double action operating cylinder, has connector feeding fluids squeezed from small piston capacity into volume flow conveyed from pump to port, and check valve intervenes with conducting direction

摘要

The valve has a device for feeding back of fluids squeezed from a small piston capacity of a double action operating cylinder (10) and guided into a large piston capacity of the cylinder for an external port (B), during movement of a piston rod. A connector (30) of the port opened in a control position of a control piston (26) is provided next to a port (A) for feeding the fluids squeezed from the small piston capacity of the operating cylinder into volume flow conveyed from a pump (18) to the port (A). A check valve (31) intervenes with a conducting direction directed to a port (P).