PVQ20 B2R SE1S 21 C20D 1 2 S2
PVH074R01AA10E2520090010 01AE01
PVH074R01AA10E2520140010 01AE01
PVH074R01AA10H002000AW10 01AB01
PVH074R01AA10H002000AW20 01AB01
PVH074R01AA50A2500000010 01AB01
PVH074R01AA50B2520000010 01AB01
PVH074R01AA50B2520000010 01AE01
PVH074R01AA50B2520000020 01AB01
PVH074R01AA60E2520090010 01AE01
PVH074R01AB50H002000AS10 01AB01
PVH074R02AA10A2500000010 010001
PVH074R02AA10A2500000010 01AE01
PVH074R02AA10A2500000020 010001
PVH074R02AA10B1920000010 0A
PVH074R02AA10B2520000010 010001
PVH074R02AA10B2520000010 01AB01
PVH074R02AA10B2520000010 020001 彈簧對中的三位四通換向閥(4WEH25…50/…型)
主閥芯(2)是靠兩個彈簧(3)保持在中間位置，兩彈簧腔與導(dǎo)閥T腔相通(無背壓)�？刂朴蛷耐ǖ�(7)引入供給先導(dǎo)閥(4)，當(dāng)先導(dǎo)閥換向后控制油作用在主閥芯(2)兩端中的一端上，推動主閥芯換向，從而使各油口按滑閥機能接通。當(dāng)電磁鐵斷電時，導(dǎo)閥芯回到初始位置(脈沖閥除外)，控制油腔(6)通過導(dǎo)閥T腔與油箱接通，在彈簧力的作用下，主閥芯回到中間位置。彈簧內(nèi)的控制油經(jīng)先導(dǎo)閥T腔或外排口Y排出。
壓力對中的三位四通換向閥(4WEH25H…50/…型)
在這種結(jié)構(gòu)中是通過壓力油作用在主閥芯(2)的兩端面上，由閥體內(nèi)的定位套使主閥芯保持在中間位置上。
如果主閥芯一端卸荷，則主閥換向，使相應(yīng)的油口接通;此卸荷端的控制油通過先導(dǎo)閥通過通道Y排出。
二位四通換向閥有4種不同的結(jié)構(gòu)
PVH074R02AA10B252000001A F1AA01
PVH074R02AA10B2520000020 010001
PVH074R02AA10B252000AL10 02AP01
PVH074R03AA10A250000001A F1AB01
PVH074R03AA10A250000001A F1AE01
PVH074R03AA10B252000001A F10001
PVH074R03AA10B252000001A F1AB01
PVH074R03AA10B252000001A P1AA01
PVH074R0NAB10A0700000010 01AF01
PVH074R0NAB10A2500000020 01AE01
PVH074R13AA10A160000001A F1AC01
PVH074R13AA10A250000001A F1AB01
PRESSURE GAGE HL15/HT15 SERIES PVH074R13AA10B162000001A F1AC01
PVQ20 B2R SE1S 21 C20D 1 2 S2
PVQ20 B2R SE1S 21 C20D 1 2 S2