Rexroth力士樂溢流閥先導閥 DBT ZDBT系列是一種液壓壓力控制閥，在液壓設備中主要起定壓溢流作用，穩壓，系統卸荷和安全保護作用。 溢流閥的作用 定壓溢流作用：在定量泵節流調節系統中，定量泵提供的是恒定流量。當系統壓力增大時，會使流量需求減小。此時溢流閥開啟，使多余流量溢回油箱，保證溢流閥進口壓力，即泵出口壓力恒定。 穩壓作用：溢流閥串聯在回油路上，溢流閥產生背壓，運動部件平穩性增加。 系統卸荷作用：在溢流閥的遙控口串接溢小流量的電磁閥，當電磁鐵通電時，溢流閥的遙控口通油箱，此時液壓泵卸荷。溢流閥此時作為卸荷閥使用。 安全保護作用：系統正常工作時，閥門關閉。實際應用中一般有：作卸荷閥用，作遠程調壓閥，作高低壓多級控制閥，作順序閥，用于產生背壓（串在回油路上）。
Rexroth力士樂溢流閥先導閥 DBT ZDBT系列部分型號：
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0811104100 DBT-XP8-1X/160
0811104101 DBT-XP8-1X/315
0811104102 DBT-XP2-1X/160
0811104103 DBT-XP2-1X/315
0811104131 DBT-XP2-1X/350
0811104104 DBT-XP7-1X/160
0811104105 DBT-XP7-1X/315
0811104106 DBT-XP3-1X/160
0811104107 DBT-XP3-1X/315
0811104108 DBT-XP1-1X/160
0811104109 DBT-XP1-1X/315
0811104110 ZDBT-XP8-1X/160
0811104111 ZDBT-XP8-1X/315
0811104112 ZDBT-XP2-1X/160
0811104113 ZDBT-XP2-1X/315
0811104130 ZDBT-XP2-1X/350
0811104114 ZDBT-XP7-1X/160
0811104115 ZDBT-XP7-1X/315
0811104116 ZDBT-XP3-1X/160
0811104117 ZDBT-XP3-1X/315
0811104118 ZDBT-XA8-1X/160
0811104119 ZDBT-XA8-1X/315
0811104120 ZDBT-XA2-1X/160
0811104121 ZDBT-XA2-1X/315
溢流閥直動式 ZDBY Z2DBY
0811101275 ZDBY10DP2-1X/80V
0811101276 ZDBY10DP2-1X/160V
0811101277 ZDBY10DP2-1X/315V
0811101278 ZDBY10DP3-1X/80V
0811101279 ZDBY10DP3-1X/160V
0811101280 ZDBY10DA2-1X/80V
0811101281 ZDBY10DA2-1X/160V
0811101282 ZDBY10DA2-1X/315V
0811101283 ZDBY10DA3-1X/80V
0811101284 ZDBY10DA3-1X/160V
0811101285 ZDBY10DB2-1X/80V
0811101286 ZDBY10DB2-1X/160V
0811101287 ZDBY10DB2-1X/315V
0811101288 ZDBY10DB3-1X/80V
0811101289 ZDBY10DB3-1X/160V
0811101290 Z2DBY10DC2-1X/80V
0811101291 Z2DBY10DC2-1X/160V
0811101292 Z2DBY10DC2-1X/315V
0811101293 Z2DBY10DC3-1X/80V
0811101294 Z2DBY10DC3-1X/160V
0811101295 Z2DBY10DD2-1X/80V
0811101296 Z2DBY10DD2-1X/160V
0811101297 Z2DBY10DD2-1X/315V
0811101298 Z2DBY10DD3-1X/80V
0811101299 Z2DBY10DD3-1X/160V
溢流閥先導式DB
R900590645 DB10-2-5X/50
R900590646 DB10-2-5X/100
R900587772 DB10-2-5X/200
R900590334 DB10-2-5X/315
R900597992 DB10-2-5X/350
R900597212 DB10-2-5X/50
R900589433 DB20-2-5X/100
R900590768 DB20-2-5X/200
R900593530 DB20-2-5X/315
R900590618 DB20-2-5X/350
R900590328 DB20G2-5X/50
R900597307 DB20G2-5X/200
R900597747 DB20G2-5X/315
R900599232 DB20G2-5X/350
R900593564 DB30-2-5X/50
R900594677 DB30-2-5X/100
R900588131 DB30-2-5X/200
R900591128 DB30-2-5X/315
R900504902 DB30-2-5X/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
R900951841 DB3U 10 H2-5X/315-6EG24N4K4
R900943647 DB3U 10 H2-5X/315-6EG24N5K4
R900701668 DB3U 10 H2-5X/315-6EG24N9DLV
