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專營銷售力士樂液壓元件: 柱塞泵A10VSO、電磁閥4WE、電磁閥3WE、溢流閥DBW、DBDS、DB、3DR、節流閥Z2S、Z2F、葉片泵PV7、PVV、齒輪泵PH2,PH4,PGF、HM20/HM17壓力傳感器、壓力繼電器HED、博世放大器、放大板 、閥0811、0820 、齒輪泵0510、減壓閥DR、ZDR、4WREE,馬達伺服驅動 電機等系列特價現貨優勢供應。
閥對流量的控制可以分為兩種：
一種是開關控制：要么全開、要么全關，流量要么大、要么小，沒有中間狀態，如普通的電磁直通閥、電磁換向閥、電液換向閥。
另一種是連續控制：閥口可以根據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：以電控方式實現對流量的節流控制（當然經過結構上的改動也可實現壓力控制等），既然是節流控制，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。我們的流程是 詢價→報價→合同→訂貨→發貨→售后，我們本著信譽第一、客戶至上、品牌服務、規范管理的經營理念竭誠為您服務。

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