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                                                                                                                                全天候呼吸閥

                                                                                                                                  詳細說明

                                                                                                                                  全天候呼吸閥

                                                                                                                                  全天候呼吸閥為閥座相互重疊的重力式結構。其特點是閥盤與閥座之間采用帶空氣墊的軟接觸,氣密性好,不易結霜凍結,適宜于寒冷的地區使用。

                                                                                                                                  閥座由剛性骨架和氟膜片組成,剛性骨架由1Cr18Ni9Ti合金鋼板沖壓而成,呈微拱形,沿周邊有一環狀凹槽,以便被膜片封隔為空氣墊。氟膜片用金屬卡箍繃緊在骨架的凹面,形成與閥座的接觸面。閥座用聚四氟乙烯制造,其直徑與骨架凹槽的直徑相當,閥口具有較大的倒角。閥盤質量根據油罐的設計允許壓力和閥盤直徑確定,必要時可利用配重調節。當閥盤自由放在閥座上時,在閥盤重力作用下,氟膜片微微凹向空氣墊凹槽。當罐內外壓力差增大時,閥盤微微升起,膜片靠自身的彈性,同閥座仍保持良好的密封,直至整個閥盤跳離閥座,膜片才經反彈逐漸恢復其原狀。

                                                                                                                                  由于氟膜片具有良好的耐油、憎水性能,且膜片與閥座的接觸角較大,因此水蒸氣很難再閥口處凝結、存留。同時,這種接觸方式能有效地防止微壓差泄漏。

                                                                                                                                  全天候呼吸閥產品特點

                                                                                                                                  全天候呼吸閥用于油及液體罐上,來排除罐內的正壓和負壓氣體,使罐內液體進出方便.如罐體上不裝呼吸閥罐內的液體進出有一定的障礙,很可能出現罐體變型和振動,全天候呼吸閥設計合理,結構簡單,使用方便;是儲罐的必備產品。

                                                                                                                                  新型全天候呼吸閥殼體選用不銹鋼、鑄鋼和鋁合金,耐腐蝕性好;

                                                                                                                                  閥盤采用四氟材料,耐低溫,防凍性能好;

                                                                                                                                  結構簡單,易檢修,安全方便;

                                                                                                                                  新型全天候呼吸閥性能完全符合石油工業部標準 SY751187 規定。

                                                                                                                                  全天候呼吸閥技術參數

                                                                                                                                  操作壓力:A級正壓:355Pa (36毫米水柱);

                                                                                                                                  負壓:295Pa (30毫米水柱)

                                                                                                                                  B級正壓:980Pa (100毫米水柱);

                                                                                                                                  負壓:295Pa (30毫米水柱)

                                                                                                                                  C級正壓:1765Pa (180毫米水柱);

                                                                                                                                  負壓:295Pa (30毫米水柱)

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