武漢力士樂比例閥4WRPH6C4B12L-2X/G24Z4/M 安裝面按DIN24340A型和ISO4401 比例閥對流量的控制可以分為兩種：
一種是開關(guān)控制：要么全開、要么全關(guān)，流量要么大、要么小，沒有中間狀態(tài)，如普通的電磁直通閥、電磁換向閥、電液換向閥。
另一種是連續(xù)控制：閥口可以根據(jù)需要打開任意一個開度，由此控制通過流量的大小，這類閥有手動控制的，如節(jié)流閥，也有電控的，如比例閥、伺服閥。
所以使用比例閥或伺服閥的目的就是：以電控方式實現(xiàn)對流量的節(jié)流控制（當(dāng)然經(jīng)過結(jié)構(gòu)上的改動也可實現(xiàn)壓力控制等），既然是節(jié)流控制，就必然有能量損失，伺服閥和其它閥不同的是，它的能量損失更大一些，因為它需要一定的流量來維持前置級控制油路的工作伺服閥的主閥一般來說和換向閥一樣是滑閥結(jié)構(gòu)，只不過閥芯的換向不是靠電磁鐵來推動，而是靠前置級閥輸出的液壓力來推動，這一點和電液換向閥比較相似，只不過電液換向閥的前置級閥是電磁換向閥，而伺服閥的前置級閥是動態(tài)特性比較好的噴嘴擋板閥或射流管閥。
也就是說，伺服閥的主閥是靠前置級閥的輸出壓力來控制的，而前置級閥的壓力則來自于伺服閥的入口p，假如p口的壓力不足，前置級閥就不能輸出足夠的壓力來推動主閥芯動作。
控制流量的方向和大小
用于位置,速度和壓力的閉環(huán)控制
通過控制電磁鐵觸發(fā)
通過感應(yīng)位置檢測器對控制滑閥進(jìn)行位置傳感
集成電控器（OBE）,用于4WRPEH
特性曲線帶或不帶變化
0811403001 4WRP10EA63S-1X/G24Z4/M
0811403017 4WRBA10EA75-2X/G24K4/M-828
0811404034 4WRPH6C3B12L-2X/G24Z4/M
0811404035 4WRPH6C3B24L-2X/G24Z4/M
0811404037 4WRPH6C4B12L-2X/G24Z4/M
0811404038 4WRPH6C4B24L-2X/G24Z4/M
0811404043 4WRPH6C3B25P-2X/G24Z4/M
0811404046 4WRPH6C4B40P-2X/G24Z4/M
0811404059 4WRPH10C3B100L-2X/G24Z4/M
0811404060 4WRPH10C4B50L-2X/G24Z4/M
0811404061 4WRPH10C4B100L-2X/G24Z4/M
0811404063 4WRPH10C3B100P-2X/G24Z4/M
0811404079 4WRPH10C5B100P-2X/G24Z4/M
0811404080 4WRP10W63S-1X/G24Z4/M
0811404104 4WRP6C3B02L-1X/G24Z4/M
0811404114 4WRBA6E30-2X/G24N9Z4/M
0811404115 4WRBA6E15-2X/G24N9Z4/M
0811404122 4WRPH6C3B04L-1X/G24Z4/M
0811404123 4WRBA6E07-2X/G24N9Z4/M
0811404140 4WRPE6E18SJ-2X/G24K0/A1M
0811404141 4WRPE6E32SJ-2X/G24K0/A1M
0811404147 4WRPE6W32SJ-2X/G24K0/F1M
0811404150 4WRBAE6E32J-2X/G24N9K31/A1M
0811404152 4WRBAE6W32J-2X/G24N9K31/A1M
0811404183 4WRL10W80S-3X/G24Z4/M
0811404188 4WRL10W80S-3X/G24ETZ4/M
0811404207 4WRL16V200M-3X/G24Z4/M
0811404209 4WRL16WZ180S-3X/G24Z4/M
0811404213 4WRL16W1Z180S-3X/G24Z4/M
0811404256 4WRLE16X200M-3X/G24K0/A1M-811
0811404273 4WRLE16W1-200M-3X/G24EK0/A1WX02M-779
0811404306 4WRLE16E1Z180SJ-3X/G24K0/A1M
0811404307 4WRLE16WZ180SJ-3X/G24K0/A1M
0811404330 4WRLE16W3-180SJ-3X/G24EK0/A1WX02M-744
0811404351 4WRPEH6C4B12L-2X/G24K0/F1M
0811404353 4WRPEH6C4B40L-2X/G24K0/F1M
0811404354 4WRPEH6C1B40L-2X/G24K0/F1M
0811404405 4WRL25V370M-3X/G24Z4/M
0811404407 4WRL25EZ350S-3X/G24Z4/M
0811404409 4WRL25W1Z350S-3X/G24Z4/M
0811404430 4WRLE25V370M-3X/G24K0/A1M
0811404439 4WRLE25W1-370M-3X/G24EK0/A1M-769
0811404440 4WRLE27W1-430M-3X/G24EK0/A1M-769
0811404457 4WRLE25W1Z350SJ-3X/G24K0/A1M
0811404473 4WRLE25W350SJ-3X/G24EK0/A1WX02M-756
0811404504 4WRLE35W1100SJ-3X/G24K0/A1M
0811404537 4WRPEH6C4B02L-2X/G24K0/F1M
0811404551 4WRPE10Q5-50M-2X/G24K0/A1M-836
0811404572 4WRLE27Q3-550P-3X/G24K0/A1M
0811404588 4WRLE35R5-1100SJ-3X/G24EK0/A1M-868
0811404601 4WRPEH6C3B12L-2X/G24K0/A1M
0811404602 4WRPEH6C3B24L-2X/G24K0/A1M
0811404603 4WRPEH6C3B40L-2X/G24K0/A1M
0811404611 4WRPEH6C4B12L-2X/G24K0/A1M
0811404612 4WRPEH6C4B24L-2X/G24K0/A1M
0811404613 4WRPEH6C4B40L-2X/G24K0/A1M
0811404643 4WRPEH6C3B25P-2X/G24K0/A1M
0811404644 4WRPEH6C3B40P-2X/G24K0/A1M
0811404656 4WRLE10X85M-3X/G24ETK0/A1M-812
0811404680 4WRLE10Q3-85M-3X/G24ETK0/A1M
0811404701 4WRLE10E1-80SJ-3X/G24K0/A1M
0811404703 4WRLE10W1-80SJ-3X/G24K0/A1M
0811404711 4WRLE10W4-80SJ-3X/G24K0/A1M
0811404720 4WRREH6VB40L-1X/G24K0/B5M
0811404746 4WRPEH6C5B40L-2X/G24K0/A1M
0811404749 4WRPEH6C5B40L-2X/G24K0/F1M
0811404750 4WRPE10EA80SJ-2X/G24K0/A1M
0811404766 4WRPE10CB80L-2X/G24K0/F1M-810
0811404772 4WRPE10W50SJ-2X/G24K0/A1M
0811404778 4WRPE10W50SJ-2X/G24K0/F1M
0811404801 4WRPEH10C3B100L-2X/G24K0/A1M
0811404802 4WRPEH10C4B50L-2X/G24K0/A1M
0811404803 4WRPEH10C4B100L-2X/G24K0/A1M
0811404819 4WRPEH10C3B50L-2X/G24K0/F1M
0811404832 4WRBA10E64-2X/G24N9Z4/M
0811404930 4WRBKE16W180SJ-1X/6ZG24K31/A1D3M
0811404931 4WRBKE16W1-180SJ-1X/6ZG24K31/A1D3M
0811404954 4WRBKE27E430SJ-1X/6ZG24EK31/A1D3M
0811404958 4WRBKE27W430SJ-1X/6ZG24K31/A1D3M
0811404977 4WRBKE35E1100SJ-1X/6ZG24EK31/A1D3M
R900244172 4WRZ16W6-100-7X/6EG24N9K4/D3M
R900244192 4WRZ32E1-520-7X/6EG24N9K4/M
R900244327 4WRZ16W8-150-7X/6EG24N9EK4/D3M
R900244328 4WRZ10W8-25-7X/6EG24N9EK4/D3M
R900244673 4WRZ25E1-220-7X/6EG24N9K4/M
R900244765 4WRZ25W6-325-7X/6EG24N9ETK4/D3M
R900244847 4WRKE25W8-350L-3X/6EG24ETK31/A5D3M
R900246100 4WRZ10W8-85-7X/6EG24ETK4/D3M
R900246793 4WREE6W32-2X/G24K31/F1V
R900246879 4WRZ32W6-520-7X/6EG24N9EK4/D3M
R900246980 4WRZ10W8-85-7X/6EG24N9K4/D3M
R900248227 4WRZ16E150-7X/6EG24N9ETK4/M
R900248373 4WRKE16E125L-3X/6EG24EK31/A1D3M
R900249373 4WRZE16W8-150-7X/6EG24N9K31/F1M
