换向阀构成的制动油路，动臂在将铲斗举升到zui高位置和下降至zui低放平位置时能自行限位制动，图中的回位限位阀（即M型和H型四位四通换向阀）是靠钢球定位的，当铲斗移至限位点时碰触开关，二位电磁阀换向，接入压缩空气，将定位钢球压回槽内，回位限位阀便在弹簧作用下恢复中位，切断动臂油缸的进、回油油路，于是动臂连同铲斗一起被限位制动。 3、利用H型、Y型换向实现浮动。：： G122-202A001液压元件，电子元器件，威格士PARKER迪普马ASCOMOOG、机械零配件，泵阀产品4WMM10E3X/F， D.C.Vlv:4WEH22 EA 7X/6E W230 N9K4R983031467 D.C.Vlv:4WEH22 EB 7X/6E G24 N9K4 D.C.Vlv:4WEH22 EB 7X/6E W230 N9K4R983031468 D.C.Vlv:4WEH22 G 7X/6E G24 N9K4R983031431 D.C.Vlv:4WEH22 G 7X/6E W110 N9K4R983031429 D.C.Vlv:4WEH22 G 7X/6E W230 N9K4 D.C.Vlv:4WEH22 GA 7X/6E G24 N9K4 D.C.Vlv:4WEH22 GA 7X/6E W230 N9K4 单向电磁阀HED8OP-2X/100P070K14SR983031481 D.C.Vlv:4WEH22 GB 7X/6E G24 N9K4 D.C.Vlv:4WEH22 GB 7X/6E W230 N9K4R983031469 D.C.Vlv:4WEH22 H 7X/6E G24 单向电磁阀HED8OP-2X/100P070K14SN9K4R983031434 D.C.Vlv:4WEH22 H 7X/6E W230 N9K4R983031470 D.C.Vlv:4WEH22 HD 7X/O6E G24 N9K4R983031445 D.C.Vlv:4WEH22 HD 7X/O6E W230 N9K4 D.C.Vlv:4WEH22 HD 7X/OF6E G24 N9K4 D.C.Vlv:4WEH22 HD 7X/OF6E W230 N9K4R983031471 D.C.Vlv:4WEH22 J 7X/6E G24 N9K4R983031422 D.C.Vlv:4WEH22 J 7X/6E W110 N9K4R983031412 D.C.Vlv:4WEH22 J 7X/6E W230 N9K4 D.C.Vlv:4WEH22 JA 7X/6E G24 N9K4 D.C.Vlv:4WEH22 JA 7X/6E W110 N9K4 D.C.Vlv:4WEH22 JA 7X/6E W230 N9K4 D.C.Vlv:4WEH22 JB 7X/6E G24 N9K4 D.C.Vlv:4WEH22 JB 7X/6E W110 N9K4 D.C.Vlv:4WEH22 JB 7X/6E W230 N9K4 D.C.Vlv:4WEH22 L 7X/6E W110 N9K4R983031472 D.C.Vlv:4WEH22 Q 7X/6E G24 N9K4R983031473 D.C.Vlv:4WEH22 R 7X/6E G24 N9K4R983031428 D.C.Vlv:4WEH22 R 7X/6E W230 N9K4 D.C.Vlv:4WEH22 RA 7X/6E G24 N9K4 D.C.Vlv:4WEH22 RA 7X/6E W230 N9K4柱塞泵A10VSO140马达还有系列单向阀CKBB-XCN,CKCB-XANZ2DB6VC2-4X/200VZ2DB6VC2-4X/200V4WE10D73-3X/OFCG24N9K44WE10D73-3X/OFCG24N9K4FD力士乐平衡阀FD12FA2X/B00/V-006FD12FA2X/B00VFD12FA2X/B03/VFD12FA2X/B03/V-006FD12FA2X/B03V12FD12FA2X/B04VFD12FA2X/B04V-016FD12FA2X/B06VFD12FB2X/200B00VFD12FB2X/200-B03/VFD12FB2X/200B03V-006FD12FB2X/200B03V12FD12FB2X/200B04VFD12FB2X/300B00VFD12FB2X/300B03/VFD12FB2X/300B03V-006FD12FB2X/300JB03VFD12FB2X/400B00VFD12FB2X/400-B03/VFD12FB2X/400B03V12