疊加式液控單向閥的工作原理與一般液壓閥基本相同，但在具體結構和連接尺寸上則不相同，它自成系列，每個疊加式液控單向閥既有一般液壓元件的控制功能，又起到通道體的作用，每一種通徑系列的疊加式液控單向閥其主油路通道和螺栓連接孔的位置都與所選用的相應通徑的換向閥相同，因此同一通徑的疊加式液控單向閥都能按要求疊加起來組成各種不同控制功能的系統(tǒng)。

華德2FRM10二通流量控制閥部分型號：
2FRM10-21B/2L 2FRM10-21B/5L 2FRM10-21B/10L 2FRM10-21B/16L
2FRM10-21B/25L 2FRM10-21B/35L 2FRM10-21B/50L 2FRM10-21B/50LB
2FRM10-21B/2LB 2FRM10-21B/5LB 2FRM10-21B/10LB 2FRM10-21B/16LB
2FRM10-21B/25LB 2FRM10-21B/35LB 2FRM10-21B/50LB 2FRM5-31B/15QB
2FRM16-21B/40L 2FRM16-21B/60L 2FRM16-21B/80L 2FRM16-21B/100L
2FRM16-21B/125L 2FRM16-21B/160L 2FRM16-21B/80LB 2FRM16-21B/100LB
2FRM16-21B/40LB 2FRM16-21B/60LB 2FRM16-21B/80LB 2FRM16-21B/100LB
2FRM16-21B/125LB 2FRM16-21B/160LB 2FRM5-31B/10QB 2FRM5-31B/15QB
2FRM5-31B/0.2Q 2FRM5-31B/0.6Q 2FRM5-31B/1.2Q 2FRM5-31B/3Q
2FRM5-31B/6Q 2FRM5-31B/10Q 2FRM5-31B/15Q 2FRM5-31B/15QB
2FRM5-31B/0.2QB 2FRM5-31B/0.6QB 2FRM5-31B/1.2QB 2FRM5-31B/3QB
2FRM5-31B/6QB 2FRM5-31B/10QB 2FRM5-31B/15QB
華德液壓閥部分型號：
DB20-1-50B/50 DB20-1-50B/100 DB20-1-50B/200 DB20-1-50B/315
DB20-2-50B/50 DB20-2-50B/100 DB20-2-50B/200 DB20-2-50B/315
DBW10B-2-50B/3156CW220-50N9Z5L DBW10B-2-50B/3156CG24N9Z5L
DBW10A-1-50B/506CW220-50N9Z5L DBW10A-1-50B/506CG24N9Z5L
DBW10A-2-50B/506CW220-50N9Z5L DBW10A-2-50B/506CG24N9Z5L
DBW20B-2-50B/3156CW220-50N9Z5L DBW20B-2-50B/3156CG24N9Z5L
DBW20A-1-50B/506CW220-50N9Z5L DBW20A-1-50B/506CG24N9Z5L
DBW20A-2-50B/506CW220-50N9Z5L DBW20A-2-50B/506CG24N9Z5L
DBW30B-2-50B/3156CW220-50N9Z5L DBW30B-2-50B/3156CG24N9Z5L
DBW30A-1-50B/506CW220-50N9Z5L DBW30A-1-50B/506CG24N9Z5L
DBW30A-2-50B/506CW220-50N9Z5L DBW30A-2-50B/506CG24N9Z5L
Z2S10-1-20B/ Z2S10-2-20B/ Z2S10-3-20B/
Z2S10A1-20B/ Z2S10A2-20B/ Z2S10A3-20B/
Z2S10B1-20B/ Z2S10B2-20B/ Z2S10B3-20B/

華德2FRM10二通流量控制閥部分型號：
2FRM10-21B/2L 2FRM10-21B/5L 2FRM10-21B/10L 2FRM10-21B/16L
2FRM10-21B/25L 2FRM10-21B/35L 2FRM10-21B/50L 2FRM10-21B/50LB
2FRM10-21B/2LB 2FRM10-21B/5LB 2FRM10-21B/10LB 2FRM10-21B/16LB
2FRM10-21B/25LB 2FRM10-21B/35LB 2FRM10-21B/50LB 2FRM5-31B/15QB
2FRM16-21B/40L 2FRM16-21B/60L 2FRM16-21B/80L 2FRM16-21B/100L
2FRM16-21B/125L 2FRM16-21B/160L 2FRM16-21B/80LB 2FRM16-21B/100LB
2FRM16-21B/40LB 2FRM16-21B/60LB 2FRM16-21B/80LB 2FRM16-21B/100LB
2FRM16-21B/125LB 2FRM16-21B/160LB 2FRM5-31B/10QB 2FRM5-31B/15QB
2FRM5-31B/0.2Q 2FRM5-31B/0.6Q 2FRM5-31B/1.2Q 2FRM5-31B/3Q
2FRM5-31B/6Q 2FRM5-31B/10Q 2FRM5-31B/15Q 2FRM5-31B/15QB
2FRM5-31B/0.2QB 2FRM5-31B/0.6QB 2FRM5-31B/1.2QB 2FRM5-31B/3QB
2FRM5-31B/6QB 2FRM5-31B/10QB 2FRM5-31B/15QB
華德液壓閥部分型號：
DR10-4-50B/50Y DR10-4-50B/100Y DR10-4-50B/200Y DR10-4-50B/315Y
DR10-4-50B/50YM DR10-4-50B/100YM DR10-4-50B/200YM DR10-4-50B/315YM
ZDR6DP1-40B/25Y ZDR6DP1-40B/75Y ZDR6DP1-40B/150Y ZDR6DP1-40B/210Y
ZDR6DP1-40B/25YM ZDR6DP1-40B/75YM ZDR6DP1-40B/150YM ZDR6DP1-40B/210YM
Z2FS6-2-40B/1Q Z2FS6-2-40B/2Q Z2FS6-3-40B/1Q Z2FS6-3-40B/2Q
Z2FS6-5-40B/1Q Z2FS6-5-40B/2Q Z2FS6-7-40B/1Q Z2FS6-7-40B/2Q
Z2FS16-30B/S Z2FS16-30B/S2 Z2FS16-30B/S3 Z2FS16-30B/S4
Z2FS22-30B/S Z2FS22-30B/S2 Z2FS22-30B/S3 Z2FS22-30B/S4
SL10PA1-40B/ SL10PA2-40B/ SL10PA3-40B/ SL10PA4-40B/
SL10PB1-40B/ SL10PB2-40B/ SL10PB3-40B/ SL10PB4-40B/
DB6K1-40B/50Y DB6K1-40B/100Y DB6K1-40B/200Y DB6K1-40B/315Y
DB6K2-40B/50Y DB6K2-40B/100Y DB6K2-40B/200Y DB6K2-40B/315Y
4WE10F31B/CG24N9Z5L 4WE10F31B/CW220-50N9Z5L
4WE10G31B/CG24N9Z5L 4WE10G31B/CW220-50N9Z5L
4WE10H31B/CG24N9Z5L 4WE10H31B/CW220-50N9Z5L