Short Circuit Valve for Three-Channel Driver

摘要

A short-circuit valve comprises a housing block (110) comprising a main bore (120), a spool (150), a spring (140) which biases the spool (150), a pilot line bore (114), a first port (113) which is connected to an annular primary chamber (121), a second port (115) which is connected to the primary chamber (121) and a permanent connection made between the first port (113) and the second port (115), two annular auxiliary chambers (122, 12) provided on each side of the primary chamber (121), grooves (152, 154) formed in the outer surface of the spool (150), an annular auxiliary chamber (150). and which is connected by at least one first radial bore (164) to the primary chamber (121) and the additional auxiliary chamber (125) through at least one second radial bore (166) or is isolated from the additional auxiliary chamber (125) according to the position of the drawer (150).