Rexroth控制调速阀R900549687 Z2FRM6CB2-2X/32QRV

Rexroth控制调速阀R900549687 Z2FRM6CB2-2X/32QRV

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调速阀是由定差减压阀与节流阀串联而成的组合阀。节流阀用来调节通过的流量，定差减压阀则自动补偿负载变化的影响，使节流阀前后的压差为定值，消除了负载变化对流量的影响。

节流阀前、后的压力分别引到减压阀阀芯右、左两端，当负载压力增大，于是作用在减压阀芯左端的液压力增大，阀芯右移，减压口加大，压降减小，从而使节流阀的压差保持不变；反之亦然。这样就是调速阀的流量恒定不变（不受负载影响）。调速阀也可以设计成先节流后减压的结构。