力士樂電磁閥線圈斷電時電磁力消失，動鐵芯在彈簧力的作用下復位，直接關閉閥口，介質不通。結構簡單，動作可靠，在零壓差和微真空下正常工作。常開型正好相反。

    REXROTH電磁閥它由閥體、閥罩、電磁組件、彈簧及密封結構等部件組成，動鐵芯底部的密封塊借助彈簧的壓力將閥體進氣口關閉。

    力士樂電磁閥通電后，電磁鐵吸合，動鐵芯上部帶彈簧的密封塊把排氣口關閉，氣流從進氣口進入膜頭，起到控制作用。當失電時，電磁力消失，動鐵芯在彈簧力作用下離開固定鐵芯，向下移動，將排氣口打開，堵住進氣口，膜頭氣流經排氣口排出，膜片恢復原來位置。

    REXROTH直動式電磁閥有常閉型和常開型二種。常閉型斷電時呈關閉狀態，當線圈通電時產生電磁力，使動鐵芯克服彈簧力同靜鐵芯吸合直接開啟閥，介質呈通路；

    上海維特銳在德國設有分公司，專做進口儀器儀表，氣動液壓類產品15年，長期供應力士樂電磁閥、REXROTH泵、力士樂放大器（可調現貨）

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