Fluid magnetic sealing technology is developed on the basis of magnetic fluids. When a magnetic fluid is injected into a gap with a magnetic field, it can fill the entire gap and become a liquid "O-ring". Block the gap to achieve the purpose of sealing。

The magnetic fluid vacuum feed device is a device for introducing rotational motion into a vacuum vessel, which is basically constituted by a permanent magnetic field, two magnetic poles, a magnetic rotating shaft and a magnetic fluid. The drive shaft is a multi-stage structure consisting of a magnetic pole and a rotating shaft. In each annular gap, it is filled with magnetic fluid. Ideally, all fluid magnetic seals form a series of "magnetic fluid seals" between each stage and the pole。
特性：
密封度好：磁性流體包圍整個轉軸，成為一隔絕空氣，水氣，煙霧等元素的密封圈，幾乎無泄漏的特性，密封圈的泄漏微弱到已無法測量。
良好可靠性：密封圈由永磁結構和穩(wěn)定的磁性流體組成，所以機械磨損僅發(fā)生在軸承上。
長壽命特性："液體O型密封圈"由一個穩(wěn)定的磁性流體構成，其裝置可長期使用10年無需維修。
無磨損：因為密封圈無磨損，沒有微粒產生，降低了整個系統(tǒng)的污染，而且低的氣壓可使密封圈便于維修，其真空度可控制在10-8Torr.
高速旋轉能力：磁性流體極低的粘滯阻力和磁性流體進行給裝置無需接觸密封圈的結構，決定了它的穩(wěn)定操作和高速轉動。