Q41H硬密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)球閥采用(yong)單斜面彈性(xing)密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)(quan)或V型槽彈性(xing)密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)(quan)結構設計,當介質(zhi)壓(ya)力(li)(li)太小(xiao)時,密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)(quan)與球體的接觸(chu)(chu)面積較小(xiao),故有較大的密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)比(bi)壓(ya),確保可靠密(mi)(mi)封(feng)(feng)(feng)(feng)(feng),介質(zhi)壓(ya)力(li)(li)較大時,密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)(quan)與球體接觸(chu)(chu)面積增大,故密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)(quan)能受較大的介質(zhi)推力(li)(li)而不會(hui)損(sun)壞。由于聚四乙烯等密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)(quan)材料具有良好(hao)的自潤(run)滑性(xing),與球體的摩擦(ca)損(sun)小(xiao),故球閥的使(shi)用(yong)壽命長。
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