| 摘要 |
#CMT# #/CMT# The valve unit has a safety device which has first (WV1) and second (WV2) selector valves connected upstream to first (V1) and second (V2) pilot valves respectively. The selector valves in each case have two selectively blockable inlets (WV1-E1,E2, WV2-E1,E2) and one outlet (WV1-A, WV2-A) connected to the associated pilot valve. In the initial position of main valves (HV1,HV2), a feed of pilot fluid takes place via the first inlets of the selector valves, and after a simultaneous switching action of the main valves a feed of pilot fluid takes place via the second inlets. #CMT#USE : #/CMT# Valve unit with safety device with facility for preventing load change of pressurized fluid at the working outlets. #CMT#ADVANTAGE : #/CMT# The valve unit is constructed in a simple and fault-insusceptible way. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows the safety valve circuit together with pressurized lines of a preferred exemplary embodiment of the valve unit in the initial position of the main valves. V1 : first pilot valve V2 : second pilot valve HV1,HV2 : main valves WV1 : first selector valve WV2 : second selector valve WV1-E1,E2 : inlets of first selector valve WV2-E1,E2 : inlets of second selector valve WV1-A : outlet of first selector valve WV2-A : outlet of second selector valve. |
