采用电液比例控制阀提高了系统的自动化程度和精度，又简化了系统。
比例阀的工作虽用伺服阀可完成，但后者精度高、价格贵，对油液清洁度要求更高。比例阀主要结构与普通阀差别不大，只是比例阀均由比例电磁铁驱动（一种电—机械转换器）。
比例阀分为：比例压力阀、比例流量阀和比例方向阀三种。
力士乐部分型号如下供您参考
A10VSO28DR/31R-PSC62K01-S1581
A10VSO100
A10VSO71
A10VSO45
A10VSO45DFR1/31R-PPA12N00
A10VSO4
R900938446 DBW10BG2-4X/200-6EG48N9K4W65
R900938191 LFA50DBW2-7X/315
R900938096 LFA40DBW2-7X/315
R900937651 DBW30A2N5X/350-6EG24N9K4V
R900936155 DBW30A2-5X/315-6EW230N9K4
R900936056 DBW10B1-5X/315-6EW230N9K4
R900935659 DBW20B1-5X/200-6EG24N9K4
R900931037 DBW30A3-5X/315-6EG24N9K4
R900930930 DBW10B2-5X/315U6EG24N9K4
R900930083 DBW10A3-5X/200-6EG24N9K4
R900929526 DBW20BG2-5X/200-6EG24N9K4
R900929289 DBW10B2-5X/200U6EG24N9K4
R900928041 DBW20B3-5X/315-6EG24N9K4
R900927502 DBW30BG2-5X/100-6EG24N9K4
R900927258 DBW30A2-5X/315-6EG24N9K4SO160
R900926544 DBW20A2-5X/315S6EG24N9K4R12
R900926499 DBW10B2-5X/200-6EGAS32101a,AS32101a-G24,AS32101a-R230
AS32100b,AS32100b-G24,AS32100b-R230
AS22061a,AS22061a-G24,AS22061a-R230
AS22060b,AS22060b-G24,AS22060b-R230
AS22101a
AS22101a-R230,U=230VAC,SIS60V-R230
AS22101a-G24,U=24VDC,SIS60V-G24;
AS22100b,AS22100b-G24,AS22100b-R230
AM22100b,AM22100b-G24,SIN60V-G24
AM22100b-R230,SIN60V-R230
AM22101A,AM22101A-G24,AM22101A-R230
AM32060B,AM32060B-S68S
AM32061A,
AM32100B,
AM32101A,
AM22061a,AM22061a-G24,AM22061a-R230;
AM22060b,AM22060b-G24,AM22060b-R230;
AK32061AAK22060B，AH4Z60A/R
BM22031a，BS22031a，BM22041a，BS22041a，BM22030b，BS22030b，BM22040b，BS22040b，BM32031a，BS32031a，BM32041a，BS32041a，AM32061a，AS32061a，AM32101a，BM32030b，BS32030b，BM32040b，BS32040b，BM3403，BS3403，BM3404，BS3404，AM3406，AS3406，AM3410，AS3410，BH2206LA，AS430B-G24,AM32061A-R230,AM32061A-G24,AM32060B-G24,AM32060B-R230,AM32101A-G24,AM32100B-G24,AM32101A-R230,AM32100B-R230,P02A01D24,AURDB6,AM32060b-M29-G24,AM32061a-M29-G24,GS22101-G24，VQSSA10-PO-32/MD35
WDPFA06-ACB-S-5-G24
WDPFA06-ACB-S-16-G24110N9K4
R900926249 DBW10A2-5X/200-6EG24N9K4
R900926054 DBW10A2-5X/315-6EG24N9K4
R900925192 DBW10B2-5X/350-6EG24N9K4
R900924235 DBWCB2-5X/100-6EG24N9K4
R900923633 DBW20B1-5X/315-6EW230N9K4
R900923462 DBW20B1-5X/315-6EW110N9K4
R900923132 DBW10B3-5X/315S6EG24N9K4R12
4WRH 25 E220-7X//M
4WRH 25 E325-7X//M
4WRH 25 E325-7X//M-402
4WRH 25 W3-325-7X//M
4WRH 25 W6-220-7X//M
4WRH 25 W6-220-7X//V
4WRH 25 W6-325-7X//M
4WRH 25 W6-325-7X//V
4WRH 25 W8-325-7X//M
4WRH 32 E520-7X//M
4WRH 32 W6-360-7X//V
4WRH 32 W6-520-7X//M
4WRH 32 W6-520-7X//V
4WRH 32 W8-520-7X//M
4WRH 32 W8-520-7X//V
4WRH 52 W1000-7XF//M
4WRH10E1-50-7X//V
4WRH10E1-85-7X//M
4WRH10E25-7X//V
4WRH10E25-7X/J/M
4WRH10E25-7X/M
4WRH10E50-7X//M
4WRH10E50-7X//V
4WRH10E85-7X//M
4WRH10E85-7X//V
4WRH10EA25-7X//M
4WRH10W50-7X//M
4WRH10W50-7X//V-115
4WRH10W6-25-7X//V
4WRH10W6-50-7X/J/V
4WRH10W6-50-7X/V
4WRH10W6-85-7X//V
4WRH10W6-85-7X/J/M
4WRH10W85-7X//V-115
4WRH16E100-7X//M
4WRH16E100-7X//V
4WRH16E100-7X/J/V
4WRH16E1-100-7X//V
4WRH16E1-150-7X//V
4WRH16E150-7X//M
4WRH16E150-7X//M-154
4WRH16E3-150-7X//V
4WRH16EA150-7X//V
4WRH16EA150-7X/J/M-102 
4WRH16EB100-7X/J/V-133
4WRH16EB150-7X/J/V-133
4WRH16M100-7X//M
4WRH16W100-7X//M
4WRH16W100-7X//V-115
4WRH16W150-7X//M-115
4WRH16W6-100-7X//M
4WRH16W6-100-7X//V
4WRH16W6-150-7X//M
4WRH16W6-150-7X//V
4WRH16W6-150-7X/J/M
4WRH16W6A150-7X//V
4WRH16W8-150-7X//M