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。

力士乐库存DBETX-1X/315G24-25NZ4M

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。

力士乐库存DBETX-1X/315G24-25NZ4M

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