控制閥具有結構簡單和動作可靠等特點，但由于它直接與工藝介質接觸，其性能直接影響系統質量和環境污染，所以對控制閥必須進行經常維護和定期檢修，尤其對使用條件惡劣和重要的場合，更應重視維修工作。重點檢查部位:
1、閥體內壁
對于使用在高壓差和腐蝕性介質場合的控制閥，閥體內壁、隔膜閥的隔膜經常受到介質的沖擊和腐蝕，必須重點檢查耐壓、耐腐的情況。
上海祥樹SCHENCKVRS 20300
上海祥樹SCHENCKVRS 20300
上海祥樹SCHENCKVRS 20300
控制閥工作時，因介質滲入，固定閥座用的螺紋內表面易受腐蝕而使閥座松動，檢查時應予注意。對高壓差下工作的閥，還應檢查閥座密封面是否沖壞。
3、閥芯
閥芯是調節工作時的可動部件，受介質的沖刷、腐蝕為嚴重，檢修時要認真檢查閥芯各部分是否被腐蝕、磨損，特別是在高壓差的情況下閥芯的磨損更為嚴重(因氣蝕現象)，應予注意。閥芯損壞嚴重時應進行更換，另外還應注意閥桿是否也有類似的現象，或與閥芯連接松動等。
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