CKD機械閥結構簡單、體積小、重量輕，只由少數幾個零件組成。而且只需旋轉90°即可快速啟閉，操作簡單，同時該閥門具有良好的流體控制特性。蝶閥處于*開啟位置時，蝶板厚度是介質流經閥體時*的阻力，因此通過該閥門所產生的壓力降很小，故具有較好的流量控制特性。蝶閥有彈密封和金屬的密封兩種密封型式。彈性密封閥門，密封圈可以鑲嵌在閥體上或附在蝶板周邊。采用金屬密封的閥門一般比彈性密封的閥門壽命長，但很難做到*密封。金屬密封能適應較高的工作溫度，彈性密封則具有受溫度限制的缺陷。 如果要求蝶閥作為流量控制使用，主要的是正確選擇閥門的尺寸和類型。蝶閥的結構原理尤其適合制作大口徑閥門。
CKD機械閥結構簡單、體積小、重量輕，只由少數幾個零件組成。而且只需旋轉90°即可快速啟閉，操作簡單，同時該閥門具有良好的流體控制特性。蝶閥處于*開啟位置時，蝶板厚度是介質流經閥體時*的阻力，因此通過該閥門所產生的壓力降很小，故具有較好的流量控制特性。蝶閥有彈密封和金屬的密封兩種密封型式。彈性密封閥門，密封圈可以鑲嵌在閥體上或附在蝶板周邊。采用金屬密封的閥門一般比彈性密封的閥門壽命長，但很難做到*密封。金屬密封能適應較高的工作溫度，彈性密封則具有受溫度限制的缺陷。 如果要求蝶閥作為流量控制使用，主要的是正確選擇閥門的尺寸和類型。蝶閥的結構原理尤其適合制作大口徑閥門。
CKD機械閥分手動平衡閥和自力式平衡閥。無論手動平衡閥還是自力式平衡閥，它們的作用都是使供熱系統的近端增加阻力，限制實際運行流量不要超過設計流量；換句話說，其作用就是克服供熱系統近端的多余資用壓頭，使電動調節閥或溫控閥能在一個許可的資用壓頭下工作。因此，手動平衡閥和自力式平衡閥，它們都是溫控閥或電動調節閥的輔助流量調節裝置，但又是非常重要的，如果選型不當，或設計不合理，電動調節閥或溫控閥都不能很好工作。分手動平衡閥和自力式平衡閥。無論手動平衡閥還是自力式平衡閥，它們的作用都是使供熱系統的近端增加阻力，限制實際運行流量不要超過設計流量；換句話說，其作用就是克服供熱系統近端的多余資用壓頭，使電動調節閥或溫控閥能在一個許可的資用壓頭下工作。因此，手動平衡閥和自力式平衡閥，它們都是溫控閥或電動調節閥的輔助流量調節裝置，但又是非常重要的，如果選型不當，或設計不合理，電動調節閥或溫控閥都不能很好工作。

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