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安全閥的開啟壓力如何調整？

更新時間：2022-03-29

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　　安全閥為不同于其它閥門僅僅起到開關的作用，更重要的是起到保護設備的安全。隨著我國經(jīng)濟建設的快速發(fā)展，在帶有壓力操控的設備項目工程越來越多。鑒于設備泄壓的需要，安全閥在保護設備過程中起到關重要的作用。安全閥（又稱泄壓閥）是根據(jù)壓力系統(tǒng)的工作壓力（工作溫度）自動啟閉，一般安裝于封閉系統(tǒng)的設備或管路上保護系統(tǒng)安全。

　　開啟壓力的調整：

　?、侔踩y出廠前，應逐臺調整其開啟壓力到用戶要求的整定值。若用戶提出彈簧工作壓力級，則按一般應按壓力級的下限值調整出廠。

　?、谑褂谜咴趯?strong>安全閥安裝到被保護設備上之前或者在安裝之前，必須在安裝現(xiàn)場重新進行調整，以確保安全閥的整定壓力值符合要求。

　?、墼阢懪谱⒚鞯膹椈晒ぷ鲏毫壏秶鷥?，通過旋轉調整螺桿改變彈簧壓縮量，即可對開啟壓力進行調節(jié)。

　?、茉谛D調整螺桿之前，應使閥進口壓力降低到開啟壓力的 90%以下，以防止旋轉調整螺桿時閥瓣被帶動旋轉，以致?lián)p傷密封面。

　　⑤為保證開啟壓力值準確，應使調整時的介質條件，如介質種類、溫度等盡可能接近實際運行條件。介質種類改變，特別是當介質聚積態(tài)不同時（例如從液相變?yōu)闅庀啵?，開啟壓力常有所變化。工作溫度升高時，開啟壓力一般有所降低。故在常溫下調整而用于高溫時，常溫下的整定壓力值應略高于要求的開啟壓力值。高到什么程度與閥門結構和材質選用都有關系，應以制造廠的說明為根據(jù)。

　?、蕹Ｒ?guī)安全閥用于固定附加背壓的場合，當在檢驗后調整開啟壓力時（此時背壓為大氣壓），其整定值應為要求的開啟壓力值減去附加背壓值。

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安全閥的開啟壓力如何調整？

安全閥的開啟壓力如何調整？