力士樂電磁閥在不同位置開有通孔，每個孔連接不同的油管，腔中間是活塞，兩面是兩塊電磁鐵，哪面的磁鐵線圈通電閥體就會被吸引到哪邊，通過控制閥體的移動來開啟或關閉不同的排油孔，而進油孔是常開的。

    德國力士樂電磁閥液壓油就會進入不同的排油管，然后通過油的壓力來推動油缸的活塞，活塞又帶動活塞桿，活塞桿帶動機械裝置。這樣通過控制電磁鐵的電流通斷就控制了機械運動。

    力士樂電磁閥閥體全不銹鋼；對于強腐蝕的介質必須選用隔離膜片式。中性介質，也宜選用銅合金為閥殼材料的電磁閥，否則，閥殼中常有銹屑脫落，尤其是動作不頻繁的場合。氨用閥則不能采用銅材。

    力士樂電磁閥爆炸性環境：必須選用相應防爆等級產品，露天安裝或粉塵多場合應選用防水，防塵品種。

    REXROTH電磁閥公稱壓力應超過管內zui高工作壓力。

上海維特銳在德國與REXROTH合作，可長期穩定供應力士樂電磁閥，REXROTH導軌，力士樂柱塞泵等產品

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