*Rexroth力士乐溢流阀

*Rexroth力士乐溢流阀

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。只有负载超过规定的极限（系统压力超过调定压力）时开启溢流，进行过载保护，使系统压力不再增加（通常使溢流阀的调定压力比系统zui高工作压力高10%～20%）。
实际应用中一般有作卸荷阀用，作远程调压阀，作高低压多级控制阀，作顺序阀，用于产生背压（串在回油路上）。
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。

*Rexroth力士乐溢流阀

德国力士乐DBD系列溢流阀型号如下
DBDS10K-1X/400,
DBDS6K1/315 ,
DBDS10K1X/400, 
DBDS10G-1X/200, 
DBDS20K1X/200 ,
DBDS20K1X/50,
DBDS10K1X/315, 
DBDS10K18/25 
DBDS6K-1X/100, 
DBDS10P1X/400 ,
DBDS6K1X/315,
DBDS10K1X/315 
DBDS10P1X/200,
DBDS6K121X/100, 
DBDS10-P-1X/200, 
DBDS10K18/25 ,
DBDS10-P-1X/200, 
DBDS10K18/25,
DBDS20P10 ,
DBDS10P1X/200 ,
DBDS10G12/200,
DBDS20K1X/50,
DBDS6K1/315,
DBDS6P1X/ 315,
DBDS20P1X/315 ,
DBDS10P1X/315,
DBDS6P1X/315 ,
DBDH10P-1X/200, 
DBDS10G-1X/200V,
DBDS10G-1X/25,
DBDS10K-1X/200, 
DBDS10K-1X/315 ,
DBDS10K-1X/315,
DBDS20G-1X/315V, 
DBDS20K-1X/200 ,
DBDS20K-1X/315 ,
DBDS20P-10/31.5 ,
DBDS10-P1X/315 ,
DBDS10K1X/400 ,
DBDS10K1X/400 ,
DBDS10G-1X/200, 
DBDH10G10/200 ,
DBDS-20K-1X/315,
DBDS10K1-1X/315,
DBDS10K1-1X/100 ,
DBDS6K-1X/100 ,
DBDS6K-1X/100 ,
DBDS10K1X/315,
DBDS10K1X/315 ,
DBDS6K-1X/100 ,
DBDS6K-1X/100  ,
DBDS20P1X/250 ,
DBDS10K1X/315 ,
DBDS10K18/25 ,
DBDS6K1X/100 ,
DBDS6K-1X/100, 
DBDS6G10/400 ,
DBDS10P1X/200 ,
DBDS6K121X/100 ,
DBDS10G-1X/200 ,
DBDS10-P-1X/200 ,
DBDS10K18/25 ,
DN10DBDS-10K10/315,
DBDS6K1X/315 ,
DBDS10P1X/200 ,
DBDS6K121X/100 ,
DBDS10-P-1X/200 ,
DBDS10K18/25 ,
DBDS6P1X/ 315 ,
DBDS10-P-1X/200, 
DBDS10K18/25 ,
DBDS10P1X/200 ,
DBDS6K121X/100 ,
DBDS10-P-1X/200 ,
DBDS10K18/25 ,
DBDS10-P-1X/200, 
DBDS10K18/25 ,
DN10DBDS-10K10/315 ,
DBDS6K1X/315 ,
DBDH10P/400 ,
DBDH6P1X/315,
DBDS30G1X/315, 
DBDS10P1X/200 ,
DBDS6G1X/315 ,
DBDS10K1X/315 ,
DBDS20K1X/315 ,
DBDS20P1X/200 ,
DBDS20P10 ,
DBDS 30 P1X/200V,
DBDS 30 K1X/315V,
DBDS 30 K1X/315,
DBDS 30 K1X/25,
DBDS 25 G1X/315,
DBDA 20 P1X/25,
DBDA 20 G1X/25,
DBDA 20 K1X/100,
DBDA 20 K1X/25V,
DBDH 20 K1X/50,
DBDA 15 G1X/25,
DBDA 10 P1X/ ,
DBDA 10 G1X/630V,
DBDA 10 G1X/25V,
DBDA 10 K1X/400,
DBDH 10 P1X/50V,
DBDH 10 G1X/315V,
DBDS 10 P1X/25V,
DBDS 10 K1X/315V,
DBDA 6 P1X/25,
DBDA 6 G1X/315V,
DBDS 6 P1X/200V,
DBDS 6 G1X/315,
DBDH 25 G1X/50,
DBDS 20 P1X/315,
DBDS 20 P1X/100,
DBDS 20 G1X/400V,
DBDS 20 G1X/315V,
DBDS 20 K1X/25,
DBDH 15 G1X/100V,
DBDH 10 P1X/315,
DBDH 6 P1X/50V,
DBDH 6 K1X/400,
DBDH 6 K1X/315,
DBDS 6 P1X/100,
DBDS 20 G1X/100V,
DBDH 10 K1X/50,
DBDS 6 P1X/50V,
DBDS 6 K1X/200,
DBDS 10 P1X/50,
DBDS 10 G1X/315V,
DBDA 6 G1X/400V,
DBDH 6 G1X/315V,
DBDS 6 P1X/315V,
DBDS 6 P1X/200,
DBDS 30 G1X/200V,
DBDS 30 G1X/100,
DBDH 25 G1X/100V,
DBDS 25 G1X/315V,
DBDS 25 G1X/315V,
DBDA 20 G1X/50V,
DBDA 20 K1X/50V,
DBDS 20 G1X/400,
DBDS 20 K1X/50,
DBDS 15 G1X/400,
DBDA 10 P1X/25V,
DBDH 10 P1X/50,
DBDH 10 G1X/400,
DBDS 10 P1X/630V,
DBDS 10 G1X/25V,
DBDS 10 K1X/25,
DBDA 8 G1X/25V,
DBDH 8 G1X/400,
DBDH 6 P1X/100V,
DBDS 6 P1X/50,
DBDS 6 K1X/50,
DBDH 30 G1X/25,
DBDH 30 K1X/25,
DBDS 30 G1X/50,
DBDS 30 K1X/200,
DBDA 20 P1X/100,
DBDH 20 P1X/25 ,
DBDS 20 P1X/315,
DBDS 20 P1X/50,
DBDS 20 K1X/50V,
DBDH 1 ,
DBDH 10 G1X/100&nb,
DBDH 10 K1X/200&nb ,
DBDS 10 G1X/630V&n ,
DBDS 10 K1X/315&nb ,
DBDA 6 K1X/100V&nb,
DBDH 6 G1X/400V&nb ,
DBDS 6 G1X/25&nbsp ,
DBDH 10 P1X/200V,
DBDH 10 K1X/630V,
DBDS 10 G1X/25,
DBDS 6 G1X/400V,
DBDS 6 G1X/400V,
DBDS 6 K1X/400V,
DBDS 6 K1X/50V,
DBDS 6 K1X/50V,
DBDS20K-10/100 ,
DBDS20K-10/25 ,
DBDS6K121X/100 ,
DBDS10-P-1X/200 ,
DBDS10K18/25 ,
DBDH6G1/315 ;
DBDH6G18/400/12;
DBD15G10/315 ;
DBDS6K1X/200 ;
DBDS20P1X/315 ;
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