全啟式封閉高壓安全閥_168体育网页版

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168体育网页版

網站地圖 | XML地圖 | 英文版冠高閥門.中國 | Shanghai GuanGao Valve Manufacturing Co., Ltd.
銷售電話:021-51078058
圖文傳真:021-36369121
點擊這裡給我發消息
所屬系列: 全啟式安全閥
名    稱: 全啟式封閉高壓安全閥
型    号: A42Y-160/320
檢索關鍵字: 全啟式封閉高壓安全閥

全啟式封閉高壓安全閥的作用
全啟式封閉高壓安全閥在系統中起安全保護作用。當系統壓力超過規定值時,安全閥打開,将系統中的一部分氣體/流體排入大氣/管道外,使系統壓力不超過允許值,從而保證系統不因壓力過高而發生事故。
全啟式封閉高壓安全閥零部件材料及連接尺寸


全啟式封閉高壓安全閥開啟壓力的調整步驟
①安全閥出廠前,應逐台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。
②使用者在将安全閥安裝到被保護設備上之前或者在安裝之前,必須在安裝現場重新進行調整,以确保安全閥的整定壓力值符合要求。
③在銘牌注明的彈簧工作壓力級範圍内,通過旋轉調整螺杆改變彈簧壓縮量,即可對開啟壓力進行調節。
④在旋轉調整螺杆之前,應使閥進口壓力降低到開啟壓力的 90%以下,以防止旋轉調整螺杆時閥瓣被帶動旋轉,以緻損傷密封面。
⑤為保證開啟壓力值準确,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,特别是當介質聚積态不同時(例如從液相變為氣相),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。高到什麼程度與閥門結構和材質選用都有關系,應以上海正鋼閥門廠的說明為根據。
⑥常規安全閥用于固定附加背壓的場合,當在檢驗後調整開啟壓力時(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。
全啟式封閉高壓安全閥常見的故障
排放後閥瓣不回座
這主要是彈簧彎曲閥杆、閥瓣安裝位置不正或被卡住造成的。應重新裝配。
洩漏
在設備正常工作壓力下,閥瓣與閥座密封面之間發生超過允許程度的滲漏。其原因有:閥瓣與閥座密封面之間有髒物。可使用提升扳手
将閥開啟幾次,把髒物沖去;密封面損傷。應根據損傷程度,采用研磨或車削後研磨的方法加以修複;閥杆彎曲、傾斜或杠杆與支點偏斜,使閥芯與閥瓣錯位。應重新裝配或更換;彈簧彈性降低或失去彈性。應采取更換彈簧、重新調整開啟壓力等措施。
到規定壓力時不開啟
造成這種情況的原因是定壓不準。應重新調整彈簧的壓縮量或重錘
的位置;閥瓣與閥座粘住。應定期對安全閥作手動放氣或放水試驗;杠杆式安全閥的杠杆被卡住或重錘被移動。應重新調整重錘位置并使杠杆運動自如。
排氣後壓力繼續上升
這主要是因為選用的安全閥排量小于設備的安全洩放量,應重新選用合适的安全閥;閥杆中線不正或彈簧生鏽,使閥瓣不能開到應有的高度,應重新裝配閥杆或更換彈簧;排氣管截有不夠,應采取符合安全排放面積的排氣管。
不到規定壓力開啟
主要是定壓不準;彈簧老化彈力下降。應适當旋緊調整螺杆或
更換彈簧。



訂貨須知:
一、①全啟式封閉高壓安全閥産品名稱與型号②全啟式封閉高壓安全閥口徑③全啟式封閉高壓安全閥是否帶附件以便我們的為您正确選型。
二、若已經由設計單位選定冠高閥門全啟式封閉高壓安全閥型号,請按全啟式封閉高壓安全閥型号直接向我司銷售部訂購。
三、當使用的場合非常重要或環境比較複雜時,請您盡量提供設計圖紙和詳細參數,由我們的冠高閥門專家為您審核把關。

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