台湾KOMPASS电磁阀 台湾KOMPASS换向阀
D4-03-3C2-A25 D4-03-3C3-A25 D4-03-3C4-A25
D4-03-3C40-A25 D4-03-3C5-A25 D4-03-3C6-A25
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D4-03-2B10B-D2 D4-03-2B11B-D2 D4-03-2B12B-D2
D4-03-3C2-D2 D4-03-3C3-D2 D4-03-3C4-D2
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D4-03-2D5A-D2 D4-03-2D7A-D2 D4-03-2D9A-D2
D4-03-2D10A-D2 D4-03-2D11A-D2 D4-03-2D12A-D2
D5-03-2B2-A15 D5-03-2B3-A15 D5-03-2B8-A15
D5-03-2B2A-A15 D5-03-2B3A-A15 D5-03-2B4A-A15
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D5-03-2B10A-A15 D5-03-2B11A-A15 D5-03-2B12A-A15
D5-03-2B2B-A15 D5-03-2B3B-A15 D5-03-2B4B-A15
D5-03-2B40B-A15 D5-03-2B5B-A15 D5-03-2B60B-A15
D5-03-2B7B-A15 D5-03-2B8B-A15 D5-03-2B9B-A15
D5-03-2B10B-A15 D5-03-2B11B-A15 D5-03-2B12B-A15
节流阀是通过改变节流截面或节流长度以控制流体流量的阀门。将节流阀和单向阀并联则可组合成单向节流阀。节流阀和单向节流阀是简易的流量控制阀,在定量泵液压系统中,节流阀和溢流阀配合,可组成三种节流调速系统,即进油路节流调速系统、回油路节流调速系统和旁路节流调速系统。节流阀没有流量负反馈功能,不能补偿由负载变化所造成的速度不稳定,一般仅用于负载变化不大或对速度稳定性要求不高的场合。
对节流阀的性能要求是:
·流量调节范围大,流量一压差变化平滑;
·内泄漏量小,若有外泄漏油口,外泄漏量也要小;
·调节力矩小,动作灵敏。
节流阀(Choke valve)的外形结构与截止阀并无区别,只是它们启闭件的形状有所不同。节流阀的启闭件大多为圆锥流线型,通过它改变通道截面积而达到调节流量和压力。节流阀供在压力降极大的情况下作降低介质压力之用。
介质在节流阀瓣和阀座之间流速很大,以致使这些零件表面很快损坏,即所谓气蚀现象。为了尽量减少气蚀影响,阀瓣采用耐气蚀材料(合金钢制造)并制成角为140~180的流线型圆锥体,这还能使阀瓣能有较大的开启高度,一般不推荐在小缝隙下节流。
台湾久冈电磁阀 台湾久冈溢流阀 台湾久冈叠加阀 台湾久冈节流阀
台湾久冈插装阀 台湾久冈单向阀 台湾久冈手动阀 台湾久冈减压阀
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