控制閥具有結(jié)構(gòu)簡單和動作可靠等特點，但由于它直接與工藝介質(zhì)接觸，其性能直接影響系統(tǒng)質(zhì)量和環(huán)境污染，所以對控制閥必須進(jìn)行經(jīng)常維護(hù)和定期檢修，尤其對使用條件惡劣和重要的場合，更應(yīng)重視維修工作。重點檢查部位:
1、閥體內(nèi)壁
對于使用在高壓差和腐蝕性介質(zhì)場合的控制閥，閥體內(nèi)壁、隔膜閥的隔膜經(jīng)常受到介質(zhì)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(zhì)滲入，固定閥座用的螺紋內(nèi)表面易受腐蝕而使閥座松動，檢查時應(yīng)予注意。對高壓差下工作的閥，還應(yīng)檢查閥座密封面是否沖壞。
3、閥芯
閥芯是調(diào)節(jié)工作時的可動部件，受介質(zhì)的沖刷、腐蝕為嚴(yán)重，檢修時要認(rèn)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(yán)重(因氣蝕現(xiàn)象)，應(yīng)予注意。閥芯損壞嚴(yán)重時應(yīng)進(jìn)行更換，另外還應(yīng)注意閥桿是否也有類似的現(xiàn)象，或與閥芯連接松動等。
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