供应DG4V-5-2NJ-M-U-H6-20压力阀单向阀特点
解决气蚀问题应从求避免气蚀的方法和耐气蚀 的材料着手,避免气蚀的方法有几种。1.改进阀芯,阀座设计,使其具有合理的液流速度分布和压力分布。如小流量调节阀采用狭长通道式阀芯、阀座。阀芯、阀座孔都有很小的锥度,适用于在恒定的上游压力条件下精确地控制流量。由于这种 结构具确吸收 能量,减小气蚀的功能,据资料报导,它曾用于4200公斤/厘米 2 的压降下。2、在 条件充许的 情况下,在液流中充气,以局部地或全部地消除低压区。3。阀门串联使用,以减小每个阀的压降。4.使阀前后压差低于该介质在调节阀入口温度下产生汽蚀现象的最大允许压差。5.介质在“流开”状态下工作,允许压差比“流闭”状态大三倍多。
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