（力士乐溢流阀）是一种液压压力控制阀，在液压设备中主要起定压溢流作用，稳压，系统卸荷和安全保护作用。 溢流阀的作用 定压溢流作用：在定量泵节流调节系统中，定量泵提供的是恒定流量。当系统压力增大时，会使流量需求减小。此时溢流阀开启，使多余流量溢回油箱，保证溢流阀进口压力，即泵出口压力恒定（阀口常随压力波动开启）。 稳压作用：溢流阀串联在回油路上，溢流阀产生背压，运动部件平稳性增加。 系统卸荷作用：在溢流阀的遥控口串接溢小流量的电磁阀，当电磁铁通电时，溢流阀的遥控口通油箱，此时液压泵卸荷。溢流阀此时作为卸荷阀使用。 安全保护作用：系统正常工作时，阀门关闭。
（力士乐溢流阀）一般有两种结构：1、直动型溢流阀 。2、先导式溢流阀。
对溢流阀的主要要求：调压范围大，调压偏差小，压力振摆小，动作灵敏，过载能力大，噪声小。
部分（力士乐溢流阀）系列型号：
溢流阀DBDA系列
R900423780DBDA6K1X/25
R90042S083DBDA6K1X/S0
R900425080DBDA6K1X/100
R900425081DBDA6K1X/200
R900425082DBDA6K1X/315
R900428387DBDA6K1X/4O0
R900427600DBDH6K1X/25
R900424734DBDH6K1X/S0
R900424199DBDH6K1X/100
R900424200DBDH6K1X/2O0
R900424201DBDH6K1X/315
R900424202DBDH6K1X/400
R900430305DBDA10K1X/2S
R900425966DBDA10K1X/50
R900425161DBDA10K1X/100
R900425162DBDA10K1X/200
R900425164DBDA10K1X/315
R900425165DBDA10K1X/400
R900426635DBDA10K1X/630
R900432465DBDA6G1X/25
R900424177DBDA6G1X/50
R900425076DBDA661X/100
R900426477DBDA6G1X/200
R900426478DBDA661X/315
R900428382DBDA6G1X/400
R900426897DBDH6G1X/25
R900424198DBDH661X/50
R900424195DBDH661X/100
R900424196DBDH6G1X/200
R900424197DBDH6G1X/315
R900424348DBDH6G1X/400
R900430378DBDH6P1X/25
R900428385DBDH6P1X/50
R900424246DBDH6P1X/100
R900427242DBDH6P1X/200
R900424266DBDH6P1X/315
R900434128DBDH6P1X/400
R900424180DBDH10G1X/50
R900424188DBDH10G1X/100
R900424178DBDH10G1X/200
R900424189DBDH10G1X/315
R900423739DBDH10G1X/630
R900445875DBDH30K1X/25
R900424193DBDH30K1X/50
R900423028DBDH20K1X/25
R900424112DBDH20K1X/50
R900424109DBDH20K1X/100
R900435222DBDH10K1X/25
R900424185DBDH10K1X/S0
R900423891DBDH10K1X/100
R900424190DBDH10K1X/200
R900424183DBDH10K1X/315
R900424184DBDH10K1X/400
R900433807DBDH10K1X/630
溢流阀先导阀 DBT ZDBT系列
0811104100DBT-XP8-1X/160
0811104101DBT-XP8-1X/315
0811104102DBT-XP2-1X/160
0811104103DBT-XP2-1X/315
0811104131DBT-XP2-1X/350
0811104104DBT-XP7-1X/160
0811104105DBT-XP7-1X/315
0811104106DBT-XP3-1X/160
0811104107DBT-XP3-1X/315
0811104108DBT-XP1-1X/160
0811104109DBT-XP1-1X/315
0811104110ZDBT-XP8-1X/160
0811104111ZDBT-XP8-1X/315
0811104112ZDBT-XP2-1X/160
0811104113ZDBT-XP2-1X/315
0811104130ZDBT-XP2-1X/350
0811104114ZDBT-XP7-1X/160
0811104115ZDBT-XP7-1X/315
0811104116ZDBT-XP3-1X/160
0811104117ZDBT-XP3-1X/315
0811104118ZDBT-XA8-1X/160
0811104119ZDBT-XA8-1X/315
0811104120ZDBT-XA2-1X/160
0811104121ZDBT-XA2-1X/315
溢流阀直动式 ZDBY Z2DBY
0811101275ZDBY10DP2-1X/80V
0811101276ZDBY10DP2-1X/160V
0811101277ZDBY10DP2-1X/315V
0811101278ZDBY10DP3-1X/80V
0811101279ZDBY10DP3-1X/160V
0811101280ZDBY10DA2-1X/80V
0811101281ZDBY10DA2-1X/160V
0811101282ZDBY10DA2-1X/315V
0811101283ZDBY10DA3-1X/80V
0811101284ZDBY10DA3-1X/160V
0811101285ZDBY10DB2-1X/80V
0811101286ZDBY10DB2-1X/160V
0811101287ZDBY10DB2-1X/315V
0811101288ZDBY10DB3-1X/80V
0811101289ZDBY10DB3-1X/160V
0811101290Z2DBY10DC2-1X/80V
0811101291Z2DBY10DC2-1X/160V
0811101292Z2DBY10DC2-1X/315V
0811101293Z2DBY10DC3-1X/80V
0811101294Z2DBY10DC3-1X/160V
0811101295Z2DBY10DD2-1X/80V
0811101296Z2DBY10DD2-1X/160V
0811101297Z2DBY10DD2-1X/315V
0811101298Z2DBY10DD3-1X/80V
0811101299Z2DBY10DD3-1X/160V
溢流阀先导式DB
R900590645DB10-2-5X/50
R900590646DB10-2-5X/100
R900587772DB10-2-5X/200
R900590334DB10-2-5X/315
R900597992DB10-2-5X/350
R900597212DB10-2-5X/50
R900589433DB20-2-5X/100
R900590768DB20-2-5X/200
R900593530DB20-2-5X/315
R900590618DB20-2-5X/350
R900590328DB20G2-5X/50
R900597307DB20G2-5X/200
R900597747DB20G2-5X/315
R900599232DB20G2-5X/350
R900593564DB30-2-5X/50
R900594677DB30-2-5X/100
R900588131DB30-2-5X/200
R900591128DB30-2-5X/315
R900504902DB30-2-5X/350
R901051933 DB3U 10 H1-5X/315-6EG24N9K4
R900911453 DB3U 10 H2-5X/100-6EG24K4
R900949067 DB3U 10 H2-5X/100-6EG24N9K4
R900955024 DB3U 10 H2-5X/100-6EW110N9K4
R901121185 DB3U 10 H2-5X/100-6EW230N9K4
R900959064 DB3U 10 H2-5X/100U6EG24N9K4
R901216698 DB3U 10 H2-5X/100Y6EG24N9K4
R900723678 DB3U 10 H2-5X/100YU6EG24N9K4
R900928220 DB3U 10 H2-5X/100YU6EW230N9K4
R900924809 DB3U 10 H2-5X/200-6EW110N9K4V
R901269809 DB3U 10 H2-5X/200U6EG24N9K4
R901153630 DB3U 10 H2-5X/200Y6EG24N9K4
R900939426 DB3U 10 H2-5X/315-6EG205N9K4
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R900943647 DB3U 10 H2-5X/315-6EG24N5K4
R900701668 DB3U 10 H2-5X/315-6EG24N9DLV
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R900710474 DB3U 10 H2-5X/315-6EG24NEXZ2
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R900924943 DB3U 10 H2-5X/315-6EW230N9K4
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R901193736 DB3U 10 H2-5X/315U6EW110N9K4
R900747100 DB3U 10 H2-5X/315U6EW230N9K4
R900958750 DB3U 10 H2-5X/315X6EG24N9K4
R900941188 DB3U 10 H2-5X/315XY6EG24K4
R900757839 DB3U 10 H2-5X/315XY6EG24N9K4
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R900617323 DB3U 10 H2-5X/315YU6EG24N9K4
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R900955174 DB3U 10 H2-5X/350-6EG24N9K4
R900943336 DB3U 10 H2-5X/350-6EG24NDL
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R901313633 DB 10 G2-5X/85E
R901317252 DB 10 G2-5X/90E
R901295019 DB 10 G2-5X/95E
