調速閥是由定差減壓閥與節(jié)流閥串聯(lián)而成的組合閥。節(jié)流閥用來調節(jié)通過的流量，定差減壓閥則自動補償負載變化的影響，使節(jié)流閥前后的壓差為定值，消除了負載變化對流量的影響[1] 。
節(jié)流閥前、后的壓力分別引到減壓閥閥芯右、左兩端，當負載壓力增大，于是作用在減壓閥芯左端的液壓力增大
，閥芯右移，減壓口加大，壓降減小，從而使節(jié)流閥的壓差（p2-p3）保持不變；反之亦然。這樣就是調速閥的流量恒定不變（不受負載影響）。
調速閥也可以設計成先節(jié)流后減壓的結構。
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2FRM 6 B36-3X/1,5QRV調速閥Rexroth
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2FRM 6 B36-3X/0,2QMV R900205577
2FRM 6 B36-3X/0,6QMV R900205578
2FRM 6 B36-3X/1,5QRV R900205507
2FRM 6 B36-3X/3QMV R900205516
2FRM 6 B36-3X/3QRV R900205517
2FRM 6 B36-3X/6QMV R900205518
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2FRM 6 B36-3X/10QMV R900205508
2FRM 6 B36-3X/10QRV R900205509
2FRM 6 B36-3X/16QRV R900205511
2FRM 6 B36-3X/25QRV R900205513
2FRM 6 B36-3X/32QRV R900205515
Z4S 6-1X/V R900489356
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2FRM 5-3X/15QJ?
R900072937?
2FRM 16-3X/160L/PL?
R900205503?
2FRM 6 A36-3X/1,5QRV?
R900205504?
2FRM 6 A36-3X/3QRV?
R900205505?
2FRM 6 A36-3X/6QRV?
R900205506?
2FRM 6 B36-3X/1,5QMV?
R900205507?
2FRM 6 B36-3X/1,5QRV?
R900205508?
2FRM 6 B36-3X/10QMV?
R900205509?
2FRM 6 B36-3X/10QRV?
R900205510?
2FRM 6 B36-3X/16QMV?
R900205511?
2FRM 6 B36-3X/16QRV?
R900205512?
2FRM 6 B36-3X/25QMV?
R900205513?
2FRM 6 B36-3X/25QRV?
R900205514?
2FRM 6 B36-3X/32QMV?
R900205515?
2FRM 6 B36-3X/32QRV?
R900205516?
2FRM 6 B36-3X/3QMV?
R900205517?
2FRM 6 B36-3X/3QRV?
R900205518 液壓閥
2FRM 6 B36-3X/6QMV?
R900205519?
2FRM 6 B36-3X/6QRV?
R900205520?
2FRM 6 B76-3X/10QMV?
R900205521?
2FRM 6 B76-3X/16QMV?
R900205522?
2FRM 6 B76-3X/16QRV?
R900205523?
2FRM 6 B76-3X/25QMV?
R900205524?
2FRM 6 B76-3X/25QRV?
R900205525?
2FRM 6 B76-3X/32QMV?
R900205526?
2FRM 6 B76-3X/32QRV?
R900205527?
2FRM 6 B76-3X/6QMV?
R900205528?
2FRM 6 B76-3X/6QRV?
R900205576?
2FRM 6 A36-3X/0,6QRV?
R900205577?
2FRM 6 B36-3X/1,5QRV調速閥Rexroth
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