普通单向阀的作用，是使油液只能沿一个方向流动，不许它反向倒流。图（a）所示是一种管式普通单向阀的结构。压力油从阀体左端的通口P1流入时，克服弹簧3作用在阀芯2上的力，使阀芯向右移动，打开阀口，并通过阀芯2上的径向孔a、轴向孔b从阀体右端的通口流出。但是压力油从阀体右端的通口P2流入时，它和弹簧力一起使阀芯锥面压紧在阀座上，使阀口关闭，油液无法通过。图（b）所示是单向阀的职能符号图。
台湾Northman直角单向阀部分型号：
CV-G03-05-10 CV-G03-50-10
CV-G06-05-10 CV-G06-50-10
CV-G10-05-10 CV-G10-50-10
CV-G03-05-20 CV-G03-50-20
CV-G06-05-20 CV-G06-50-20
CV-G10-05-20 CV-G10-50-20
台湾北部精机northman叠加式液控单向阀
MPC-02W-05-30 MPC-02A-05-30 MPC-02B-05-30
MPC-02W-50-30 MPC-02A-50-30 MPC-02B-50-30
MPC-03W-05-30 MPC-03A-05-30 MPC-03B-05-30
MPC-03W-50-30 MPC-03A-50-30 MPC-03B-50-30
MPC-04W-05-30 MPC-04A-05-30 MPC-04B-05-30
MPC-04W-50-30 MPC-04A-50-30 MPC-04B-50-30
MPC-06W-05-30 MPC-06A-05-30 MPC-06B-05-30
MPC-06W-50-30 MPC-06A-50-30 MPC-06B-50-30
MPC-02W-05-40 MPC-02A-05-40 MPC-02B-05-40
MPC-02W-50-40 MPC-02A-50-40 MPC-02B-50-40
MPC-03W-05-40 MPC-03A-05-40 MPC-03B-05-40
MPC-03W-50-40 MPC-03A-50-40 MPC-03B-50-40
MPC-04W-05-40 MPC-04A-05-40 MPC-04B-05-40
MPC-04W-50-40 MPC-04A-50-40 MPC-04B-50-40
MPC-06W-05-40 MPC-06A-05-40 MPC-06B-05-40
MPC-06W-50-40 MPC-06A-50-40 MPC-06B-50-40
台湾northman溢流阀 台湾northman电磁阀 台湾northman代理
MSRF-02P-1PN-K-1-DC24-10 MSRF-02P-1PN-K-1-DC12-10
MSRF-02P-1PN-K-1-AC230-10 MSRF-02P-1PN-1-DC24-10
MSRF-02P-1PN-1-DC12-10 MSRF-02P-1PN-1-AC230-10
MSRF-02P-1PN-K-2-DC24-10 MSRF-02P-1PN-K-2-DC12-10
MSRF-02P-1PN-K-2-AC230-10 MSRF-02P-1PN-2-DC24-10
MSRF-02P-1PN-2-DC12-10 MSRF-02P-1PN-2-AC230-10
MSRF-02P-1PN-K-3-DC24-10 MSRF-02P-1PN-K-3-DC12-10
MSRF-02P-1PN-K-3-AC230-10 MSRF-02P-1PN-3-DC24-10
MSRF-02P-1PN-3-DC12-10 MSRF-02P-1PN-3-AC230-10
MSRF-02P-1NP-K-1-DC24-10 MSRF-02P-1NP-K-1-DC12-10
MSRF-02P-1NP-K-1-AC230-10 MSRF-02P-1NP-1-DC24-10
MSRF-02P-1NP-1-DC12-10 MSRF-02P-1NP-1-AC230-10
MSRF-02P-1NP-K-2-DC24-10 MSRF-02P-1NP-K-2-DC12-10
MSRF-02P-1NP-K-2-AC230-10 MSRF-02P-1NP-2-DC24-10
MSRF-02P-1NP-2-DC12-10 MSRF-02P-1NP-2-AC230-10
MSRF-02P-1NP-K-3-DC24-10 MSRF-02P-1NP-K-3-DC12-10
MSRF-02P-1NP-K-3-AC230-10 MSRF-02P-1NP-3-DC24-10
MSRF-02P-1NP-3-DC12-10 MSRF-02P-1NP-3-AC230-10
台湾北部精机电控溢流阀 台湾北部精机溢流阀
台湾northman溢流阀 台湾northman电磁阀 台湾northman代理
MSRF-03P-1PN-K-1-DC24-10 MSRF-03P-1PN-K-1-DC12-10
MSRF-03P-1PN-K-1-AC230-10 MSRF-03P-1PN-1-DC24-10
MSRF-03P-1PN-1-DC12-10 MSRF-03P-1PN-1-AC230-10
MSRF-03P-1PN-K-2-DC24-10 MSRF-03P-1PN-K-2-DC12-10
MSRF-03P-1PN-K-2-AC230-10 MSRF-03P-1PN-2-DC24-10
MSRF-03P-1PN-2-DC12-10 MSRF-03P-1PN-2-AC230-10
MSRF-03P-1PN-K-3-DC24-10 MSRF-03P-1PN-K-3-DC12-10
MSRF-03P-1PN-K-3-AC230-10 MSRF-03P-1PN-3-DC24-10
MSRF-03P-1PN-3-DC12-10 MSRF-03P-1PN-3-AC230-10
MSRF-03P-1NP-K-1-DC24-10 MSRF-03P-1NP-K-1-DC12-10
MSRF-03P-1NP-K-1-AC230-10 MSRF-03P-1NP-1-DC24-10
必须保证液控单向阀有足够的控制压力，不允许控制压力失压。应注意控制压力是否满足反向开启的要求。如果液控单向阀的控制引自主系统时，则要分析主系统压力的变化对控制油路压力的影响，以免出现液控单向阀的误动作。单向阀
1—阀体2—阀芯3—弹簧
2.液控单向阀
液控单向阀
(a)结构图
(b)职能符号图
1—活塞2—顶杆3—阀芯