REGULATOR FOR A COMPRESSED AIR DRIVEN VACUUM GENERATOR, THE REGULATOR ARRANGED TO MAINTAIN A NEGATIVE PRESSURE IN A GRIPPER ACTUATED BY VACUUM

摘要

A regulator (1) is shown, which, in co-operation with a compressed-air-driven vacuum generator, is effective to maintain a negative pressure in a gripper activated by vacuum, and which regulator comprises a process-air duct (3) for the supply of compressed air to the vacuum generator and a flow-regulating slide (9) that is movably arranged in the process-air duct and biased to move toward a flow- reducing position, as well as a control means (17, 18, 25) actuating the slide and the force of which against the slide in the opposite direction of motion is determined by the pressure prevailing at each instant of time on the vacuum side of the vacuum generator, which via a control duct (21, 2 ') is led into the control means in the regulator, wherein the slide (9) is movably mounted in a lining (8) standing transverse to the process-air duct (3) and having mutually opposite openings ( 10, 11) in the wall of the lining for process-air flow through the lining and the slide.