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                應用知識
                氣動球閥特點
                發布時間:2015-06-16 10:49:34
                 
                氣動球閥由三片式球閥配置氣動執行器組成,氣動執行器分為雙作用和單作用型,通過電磁閥控制,實現球閥開關動作。氣動球閥可實現智能化控制,快速開啟或關閉管路,能有效的對管網進行控制和管理。
                  氣動球閥的特點:角行程輸出扭矩,開啟迅速、平穩可靠,適用廣泛。
                  氣動球閥主要用于截斷或接通管路中的介質,亦可用用于流體的調節與控制,它與其它閥類相比,具有以下一些優點。
                1、流體阻力小、氣動球閥是所有閥類中流體阻力最小的一種,即使是縮徑氣動球閥,其流體阻力也相當小。
                2、止推軸承減小閥桿磨擦力矩,可使閥桿長期操作平穩靈活。
                3、閥座密封性能好,采用聚四氟乙烯等彈性材料制成的密封圈,結構易于密封,而且氣動球閥的閥封能力隨著介質壓力的增高而增大。
                4、閥桿密封可靠,由于閥桿只作彷轉動運而不做升降運動,閥桿的填料密封不易破壞,且密封能力隨著介質的壓力增高而增大。
                5、由于聚四氟乙烯等材料具有良好的自潤滑性,與球體的磨擦損失小,故氣動球閥的使用壽命長。
                6、下裝式閥桿和閥桿頭部凸階防止閥桿噴出,如火災造成閥桿密封破壞,凸階與閥體間還可形成金屬接觸,確保閥桿密封。
                7、防靜電功能:在球體、閥桿、閥體之間設置彈簧,能將開關過程產生的靜電導出。

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