Hydraulic volume flow control device e.g. for loaded working equipment, such as forklift truck, includes main valve body operating in conjunction with main valve seat and has pilot

摘要

Provision of a damped delay of a lifting vehicle's hoist and particularly of a forklift truck's fork, in order to avoid vibration and over-swing of the lifting device and resulting in greater working safety. The control device uses at least one check valve (14) which includes a main valve body (16) which operates in conjunction with a main valve seat (18) and with a pilot control valve body (22) actuated by a positional element (20) and which operates in conjunction with a pilot valve seat (24). A component (ring) (34) arranged on the pilot valve body provides the required reduction of the throttling cross-section during closure of the pilot valve body.