派克比例閥D41FHB32C4NS0047水泥廠用比例閥對(duì)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(gè)開度，由此控制通過(guò)流量的大小，這類閥有手動(dòng)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(shí)現(xiàn)對(duì)流量的節(jié)流控制（當(dāng)然經(jīng)過(guò)結(jié)構(gòu)上的改動(dòng)也可實(shí)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?yàn)樗枰欢ǖ牧髁縼?lái)維持前置級(jí)控制油路的工作伺服閥的主閥一般來(lái)說(shuō)和換向閥一樣是滑閥結(jié)構(gòu)，只不過(guò)閥芯的換向不是靠電磁鐵來(lái)推動(dòng)，而是靠前置級(jí)閥輸出的液壓力來(lái)推動(dòng)，這一點(diǎn)和電液換向閥比較相似，只不過(guò)電液換向閥的前置級(jí)閥是電磁換向閥，而伺服閥的前置級(jí)閥是動(dòng)態(tài)特性比較好的噴嘴擋板閥或射流管閥。

D41FHA31C1NB0047

D41FHA31C2NB0047

D41FHA31F1NB0047

D41FHA32C1NB0047

D41FHA32C2NE0047

D41FHA32F2NB0047

D41FHA61B4NB0047

D41FHA61C2NB0047

D41FHA61F1NB0047

D41FHA61F2NB0047

D41FHA61F4VB0047

D41FHA63E2NB0047

D41FHB11F1NB0047

D41FHB11F1VB0047

D41FHB11F1VE0047

D41FHB11F2NB0847

D41FHB11F4NB0047

D41FHB12F1NB0047

D41FHB12F4NB0047

D41FHB13F4NB0047

D41FHB15F4NB0047

D41FHB31B2NB0047

D41FHB31B4NB0047

D41FHB31B4NS0047

D41FHB31B5NB0047

D41FHB31C1NB0047

D41FHB31C1NE0047

D41FHB31C1VB0047

D41FHB31C2NB0047

D41FHB31C2NE0047

D41FHB31C4NB0047

D41FHB31E1NB0047

D41FHB31E1NB0847

D41FHB31E1NE0047

D41FHB31E2NS0047

D41FHB31E4NB0047

D41FHB31E4NB0847

D41FHB31E4NE0047

D41FHB31F1NB0047

D41FHB31F1NE0047

D41FHB31F2NB0047

D41FHB31F2NB0847

D41FHB31F2NE0047

D41FHB31F4NB0047

D41FHB31F4NE0047

D41FHB31F4VB0047

D41FHB32B1NB0047

D41FHB32B1NE0047

D41FHB32B4NB0047

D41FHB32B4NS0047

D41FHB32B5NB0047

D41FHB32C1NB0047

D41FHB32C1NS0047

D41FHB32C2NB0047

D41FHB32C2NE0047

D41FHB32C2VB0047

D41FHB32C4NB0047

D41FHB32C4NS0047

D41FHB32E1NB0047

D41FHB32E1NE0047

D41FHB32E1VB0047

D41FHB32E2NB0047

D41FHB32E2NE0047

D41FHB32E2VB0047

D41FHB32F1NB0047

D41FHB32F2NB0047

D41FHB32F2NE0047

D41FHB32F2NS0047

D41FHB32F4NB0047

D41FHB32F4NE0847

D41FHB32F5NB0047

D41FHB34F1NB0047

D41FHB34F2NB0047

D41FHB34F4NB0047

D41FHB61B1NB0047

D41FHB61B2NB0047

D41FHB61B4NB0047

D41FHB61B4NB2047

D41FHB61B4VB0047

D41FHB61C1NB0047

D41FHB61C2NB0047

D41FHB61C2NE0047

D41FHB61C4NB0047

D41FHB61C5NB0047

D41FHB61E1NE0047

D41FHB61E2NB0047

D41FHB61E4NB0047

D41FHB61E4NS0047

D41FHB61F1NB0047

D41FHB61F1VB0047

D41FHB61F2NB0047

D41FHB61F2NE0047

D41FHB61F2VB0047

D41FHB61F4NB0047

D41FHB61F4VB0047

D41FHB61F5NB0047

D41FHB63B1NB0047

D41FHB63B4NB2047

D41FHB63C4NB0047

D41FHB63C4NB2047

D41FHB63E1NB0047

D41FHB63E2NB0047

D41FHB63E4NB2047

D41FHB63F4NB0047

D41FHB83F2NB0047

D41FHB83F4NB0047

D41FHB83F5NB0047

D41FHE01B1NB0047

D41FHE01B1NE0047

D41FHE01B1NS0047