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力士樂比例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zui大、要么zui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。

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上海維特銳實業發展有限公司現貨供應德國力士樂比例閥系列產品，如需詳細了解請點擊：德國力士樂比例閥