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                                                                                                                                進口蒸汽減壓閥實物圖

                                                                                                                                  詳細說明

                                                                                                                                  美國依洛克YLOK導閥型隔膜式進口蒸汽減壓閥在普通減壓閥的基礎上做了很大的改進。進口蒸汽減壓閥膜片采用了新型材料,并大大加工了工作面積,因此閥門上游壓力或下游負荷細微的變化都能及時準確的反饋到主閥膜片,來調節主閥的開度,確保下游壓力的穩定。進口蒸汽減壓閥同一個閥體上可安裝和互換多個導閥在穩壓的同時,實現溫度控制、上游壓力的控制、遠程的開關控制等。

                                                                                                                                  進口蒸汽減壓閥產品性點:

                                                                                                                                  導閥型隔膜式進口蒸汽減壓閥可用于蒸汽、壓縮空氣及其它氣體的壓力控制。WDV系列進口蒸汽減壓閥的閥體采用了不同的材質,分別為鑄鋼和不銹鋼。對不同型號的閥,內部組件采用統一的不銹鋼材質,以方便維修保養和更換。WDV導閥型進口蒸汽減壓閥碳鋼閥體,主閥閥芯閥座、導閥、內部彈簧及過濾網等均為不銹鋼材質。適用于蒸汽和壓縮空氣系統。WDV型導閥型隔膜式減壓閥的壓力調節比可達10:1,控制準確。當壓力范圍超過10:1時,可采用兩個減壓閥串聯。導閥型隔膜式進口蒸汽減壓閥采用軟閥座,可用于壓縮空氣和其它工業氣體,但不適用于氧氣。

                                                                                                                                  進口蒸汽減壓閥工作原理

                                                                                                                                  進口蒸汽減壓閥作用原理是靠閥內流道對水流的局部阻力降低水壓,水壓降的范圍由連接閥瓣的薄膜或活塞兩側的進出口水壓差自動調節。近年來又出現一些新型減壓閥,如定比式減壓閥。定比減壓原理是利用閥體中浮動活塞的水壓比控制,進出口端減壓比與進出口側活塞面積比成反比。這種減壓閥工作平穩無振動;閥體內無彈簧,故無彈簧銹蝕、金屬疲勞失效之慮;密封性能良好不滲漏,因而既減動壓(水流動時)又減靜壓(流量為0時);特別是在減壓的同時不影響水流量。水流通過減壓閥雖有很大的水頭損失,但由于減少了水的浪費并使系統流量分布合理、改善了系統布局與工況,因此總體上講仍是節能的。進口蒸汽減壓閥的每一檔彈簧只在一定的出口壓力范圍內適用,超出范圍應更換彈簧。在介質工作溫度比較高的場合,一般選用先導活塞式減壓閥或先導波紋管式減壓閥。介質為空氣或水(液體)的場合,一般宜選用直接作用薄膜式減壓閥或先導薄膜式減壓閥。介質為蒸汽的場合,宜選用先導活塞式減壓閥或先導波紋管式減壓閥。為了操作、調整和維修的方便,進口蒸汽減壓閥一般應安裝在水平管道上。進口蒸汽減壓閥工作原理 啟動前導閥彈簧處于自由狀態時,主閥和導閥處于關閉狀態。導閥有彈簧力作用打開,蒸汽經由導閥進入主隔膜室,一部分蒸汽則經由控制孔流出,當導閥流入的蒸汽大于由控制孔流出的蒸汽,主隔膜閥中的控制壓力增大,打開主閥。隨著蒸汽流過主閥,下游壓力的增量經由感應管反饋,作用在導閥隔膜下,平衡隔膜上部的彈簧壓力,使導閥組建關閉節流,維持主隔膜中的壓力,控制主閥開度輸送適量的蒸汽。調節導閥隔膜上的彈簧即可改變下游壓力。


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