阀芯处于中间位置。此时P、A、B、T各油腔互不相通;当左端电磁铁通电时下图b，该电磁铁吸合，并推动阀芯向右移动，使P和B连通，A和T连通。当其断电后，右端复位弹簧的作用力可使阀芯回到中间位置，恢复原来四个油腔相互封闭的状态
PVH45B2ERSNFS2S40C28V11B20 PVM045ER06CS02AABA
PVH45B2ERSNFS3S40C2820 PVM045ER07CS02AAAA
PVQ50B2ERSNFS1S40CM720 PVM050ER05CS02AAAA
PVQ50B2ERSNF UPF1S-CL-08-B-W-20
UPF1S-CL-08-F-W-20
F3-XG-06-1B-30-S24
460717 XG-10-3F-22UG
583868 XG-03-2F-30
590294 XG-03-3F-30
626077 XG-06-2B-30
626078 XG-06-3F-30
626079 XG-10-3F-30
629021 XG-03-1F-30
629047 F3-XG-06-1B-30
975753 XG-10-2F-22UG
976586 XG-10-1F-22UG
976743 F3-XG-10-3F-22UG
FCG-H
FCG-HS1S40C21V11P20 PVM050ER05CS02AACA
PVQ50B2ERSNMS1S40C21V11P20 PVM050ER05CS04AACA
PVQ50B2ERSNFS2S40CT6E 045 1R** A4
T6E 045 1R** A4
T6E 045 1R** A5
T6E 045 2L** A1
T6E 045 2L** A1
T6E 045 2R** A1
T6E 045 2R** A1
T6E 045 2R** A4
T6E 045 2R** A4
T6E 045 2R** A5
T6E 045 3L** A1
T6E 045 3L** A1
T6E 045 3L** A1
T6E 045 3R** A1
T6E 045 3R** A1
T6E 045 3R** A1
T6E 045 3R** A4
T6E 045 3R** A4
T6E 045 4R** A1
T6E 050 1L** A1
T6E 050 1L** A1
T6E 050 1L** A1
T6E 050 1L** A1
T6E 050 1L** A1
T6E 050 1L** A5
T6E 050 1L** A52120 PVM050ER06CS02AAAA
PVQ50B2ERSNFS2S40C21V11P20 PVM050ER06CS02AACA
PVH45B2ERSA9FS1S40C23V11B20 PVM045ER05CS02AABA00A
PVH45B2ERSA9FS1S40C28V11B20 PVM045ER05CS02AABA00A
PVH45B2ERSB13FS4S40C28V11B20 PVM045ER08CS02AABC00A
PVQ50B2ERSA9FS1S40CM720 PVM050ER05CS02AAAA00A
PVH57B2ERSNFE7S40C2831 PVM057ER07CE02AAAA
PVH57C2ERSNFE1S40CM10V11B31 PVM057ER09EE02AABA
PVQ63C2ERSNFE1S40C2131 PVM063ER09EE02AAAA
PVQ63C2ERSNSE1S40C21V11B31 PVM063ER09EE01AABA