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(p2-p3)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)
551349;KHMF-032-PNX;
551814;KHM-20SRX;
551815;KHM-25SRX;
552762;KHB-GX-NV08-20节流阀（针阀）
FC08-20F单向节流阀
EC10-30压力补偿元件
FD10-41分流、集流阀（油缸同步阀）
UP10-30御荷阀
EFC比例阀
HYDRAFORCE海德福斯电磁阀，
HYDRAFORCE海德福斯液控及手控换向阀，
HYDRAFORCE海德福斯流量控制阀，
HYDRAFORCE海德福斯压力控制阀，
HYDRAFORCE海德福斯电液比例阀及放大器，
HYDRAFORCE海德福斯手动液压泵
电磁阀：SV08-20、G;48;EUR
552908;KHB-15LRX-G;42 4WE6HB62/EG24N9K4REXROTH DBW30B2-5X/315UEW230-N9K4WE10J33/CG24N9K4 叠加式减压阀
4WE6GA62/EG24N9K4REXROTH FD32PA2X/B04V4WE10E33/CG24N9K4 ZDR6DA2-4X/150Y
4WE6GB62/EG24N9K4REXROTH Z4S10-3X4WE10G33/CG24N9K4 ZDR6DP2-4X/75YM
4WE6D6X/OFEG24N9K4 REXROTH ZDC25P-20/M4WE10H33/CG24N9K4 ZDR6DP2-4X/150YM
4WE6D7X/HG24N9K4REXROTH ZDC25P-2X/M10通经电磁阀（AC220V）ZDR6DP2-4X/210YM
4WE6Y7X/HG24N9K4REXROTH ZDC32P-2X/M 4WE10E33/CW230N9K4 ZDR10DP1-5X/150YM
4WE6J7X/HG24N9K4REXROTH 4WE6D6X/EG24N9K44WE10J33/CW230N9K4 ZDR10DP2-5X/150YM
4WE6E7X/HG24N9K4REXROTH 4WE6D6X/EW110N9K44WE10H33/CW230N9K4 ZDR10DP2-5X/210YM
4WE6H7X/HG24N9K4REXROTH 4WE6E6X/EG24N9K44WE10G33/CW230N9K4 ZDR10DA2-5X/75Y
4WE6G7X/HG24N9K4REXROTH 4WE6R6X/EG24N9K46通径球阀电液换向阀
6通经电磁阀（AC220V）REXROTH DBDS10P1X/315M-3SED6UK1X/350CG24N9K44WEH16D7X/6HG24N9ETK4/B10
4WE6D62/EW230N9K4 REXROTH DR10-5-5X/315 YMM-3SED6CK1X/350CG24N9K44WEH16E7X/6HG24N9ETK4/B10
4WE6Y62/EW230N9K4REXROTH HSZ06A604-3X/V00 M-2SEW6N3X/420MG205N9K44WEH16E7X/6EG24N9ETK4/B10
4WE6Y62/EW230N9K4/VREXROTH 4WE10J-20/LW220V-50NZ4 M-3SEW6C3X/420MG24N9K44WEH16J7X/6EG24N9ETK4/B10
4WE6J62/EW230N9K4 REXROTH 4WEH16J-7X/6EW230N9ESK4M-3SEW6C3X/630MG24N9K44WEH22J7X/6HG24N9ETK4/B10
4WE6E62/EW230N9K4 REXROTH VT-VSPA2-1-1X/T1 M-3SEW6U3X/420MG24N9K44WEH22E/6HG24N9ETK4
554028;KHPX;
554216;KHMFF-125-PNX;1.
554218;KHFF-150-PNX;3.
554292;KHB-GX-G;63
554293;KHB-GX-G;76
554294;KHB-GX-G;80
554295;KHB-GX-G;
554296;KHB-GX-G;
554297;KHM-GX-G;
554298;KHM-GX-G;
554302;KHB-10LRX-G;76
701076;KHM-GX;
701079;KHM-GX;
701082;KHM-GX;633;EUR
701085;KHM-GX;719;EUR
701199;KHBFX;92
701222;KHBF-025-PNX;
701225;KHBF-025-PNX;
701240;KHBF-025-PNX;
701258;KHMF-040-PNX;