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，稳压，系统卸荷和安全保护作用。溢流阀在装配或使用中，由于O形密封圈、组合密封圈的损坏，或者安装螺钉、管接头的松动，都可能造成不应有的外泄漏。

如果锥阀或主阀芯磨损过大，或者密封面接触不良，还将造成内泄漏过大，甚至影响正常工作

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*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

威格士插装阀、溢流阀、液压阀
CVI-16-D10-M-40
CVI-16-D10-H-40
CVI-16-D16-L-40
CVI-16-D16-M-40
CVI-16-DC16-M-40
CVI-16-R16-L-40
CVI-16-R16-M-40
CVI 16 D20 2 L 10
CVI 16 D20 2 H 10
CVI 16 F 2 M 10
CVI-16-U-40
CVI-16-X2-40
CVI-25-D10-M-40
CVI-25-D10-H-40
CVI 25 D105V M 40
CVI-25-D105-H-40
CVI-25-D16-L-40
CVI-25-D16-M-40
CVI-25-D16-H-40
CVI-25-DC16-M-40
CVI-25-R16-L-40
CVI-25-R16-M-40
CVI 25 R16 H 40
CVI 25 D20 2 L 10
CVI 25 D20 2 M 10
CVI 25 D20 2 H 10
CVI 25 F 2 L 10
CVI-25-C10F-H-40
CVI-25-U-40
CVI-25-X2-40

CVI-25-ZDN105-L-10
CVI-25-ZDN105-M-10
CVI-25-HFV-20-A-43-10
F3 CVI 25 D20 2 H 10
F3 CVI 25 D20 2 M 10
F3-CVI-25-C10F-H-40
F3-CVI-25-D16-L-40
F3-CVI-25-D10-H-40
CVI-32-D10-L-40
CVI-32-D10-M-40
CVI-32-D10-H-40
CVI-32-D105-M-40
CVI 32 D20 2 L 10
CVI 32 D20 2 M 10
CVI 32 D20 2 H 10
CVI-32-D16-L-40
CVI-32-D16-M-40
CVI-32-D16-H-40
CVI-32-R16-L-40
CVI-32-R16-M-40
CVI-32-R16-H-40
CVI-32-DC16-M-40
CVI-32-C10F-H-40
CVI-32-X2-40
CVI-32-U-40
CVI-32-HFV-20-A-63-10
CVI-32-ZD105-L-10
CVI-32-ZD105-M-10
CVI-32-ZDN105-L-10
CVI-32-ZDN105-M-10
F3 CVI 32 D20 2 L 10
F3 CVI 32 D20 2 M 10
CVI-40-D10-M-40
CVI-40-D10-H-40
CVI-40-D10-C-40
CVI-40-D105-L-40
CVI-40-D105-M-40
CVI 40 D105V H 40
CVI-40-D105V-H-40-10
CVI-40-D16-L-40
CVI-40-D16-M-40
CVI-40-D16-H-40
CVI 40 D20 2 L 10
CVI 40 D20 2 M 10
CVI 40 D20 2 H 10
CVI-40-R16-L-40
CVI-40-R16-M-40
CVI 40 F 2 L 10
CVI 40 F 2 M 10
CVI-40-X2-40
CVI-40-OD105-40
CVI-40-ZDN105-L-10
CVI-40-ZDN105-M-10
CVI-40-HFV-20-A-90-10
F3 CVI 40 D20 2 M 10
CVI 50 D20 2 L 10
CVI 50 D20 2 M 10
CVI 50 D20 2 H 10
CVI 50 F 2 L 10
CVI-50-HFV-20-A-130-10
F3 CVI 50 D11 2 H 10
CVI 63 D11 2 M 10 10
CVI 63 D20 2 L 10
CVI 63 D20 2 M 10
CVC 63 D5 B29 10
CVI 63 R 2 M 10
CVI 63 F 2 L 10
CVI 63 F 2 M 10
CVI-63-HFV-20-B-216-10
CVI-63-HFV-20-A-216-10
CVCS-16-C3-B29-W-250-11
CVCS-16-C3-B29-W-350-11
CVCS 16 N B29 10
CVCS-16-A-B29-W-10
CVCS 16 U3 B29 W 250 11
CVCS-16-X3-B29-W-125-11
CVCS-16-X3-B29-W-250-11
CVCS-16-PC-B29-10
CVCS-16-D3-B29-10
CVCS-16-W-B29-10
CVCS-16-W-B29-10-Z200
F3-CVCS-16-D3-B29-10
CVCS 25 A S2 W 10
CVCS-25-A-B29-W-10
CVCS-25-B-29-10
CVCS-25-C-B29-W-350-11
CVCS-25-C-S2-W-350-11
CVCS-25-C-B29-W-250-11
CVCS-25-C3-B29-W-125-11
CVCS-25-C3-B29-W-250-11
CVCS-25-C3-B29-W-350-11
CVCS 25 C3 B29 M 350 11
CVCS-25-D3-B29-10
CVCS-25-PC-B29-10
CVCS-25-X-S2-W-125-11
CVCS-25-X-B29-W-125-11
CVCS-25-X-B29-W-250-11
CVCS-25-X3-B29-W-250-11
CVCS-25-U-B29-W-250-11
CVCS-25-HFV3-B29-10
CVCS-25-HFV3-W-B29-10
CVCS-25-N-B29-10
CVCS-25-W-B29-10
CVCS-25-W13-B29-10

CVCS-25-W33-B29-10
CVC 25 W B29 10
F3-CVCS-25-C1-S2-W-250-1
F3 CVCS 25 C3 B29 W 350
F3 CVCS 25 D1 S2 10
F3 CVCS 25 D3 B29 10
F3 CVCS 25 U1 S2 W 250 1
CVCS 32 A S2 W 10
CVCS 32 A B29 W 10
CVCS 32 A3 B29 W 10
CVCS 32 A3 B29 W 10
CVCS-32-C1-S2-W-250-11
CVCS 32 C3 B29 W 350 11
CVCS-32-C3-B29-W-250-11
CVCS 32 D3 B29 10
CVCS-32-PC-B29-10
CVCS 32 X B29 W 125 11
CVCS-32-X-B29-M-250-11
CVCS-32-X-B29-W-250-11
CVCS-32-HFV3-B29-10
CVCS-32-HFV3-W-B29-10
CVCS-32-N-B29-10
CVCS-32-W13-B29-10
CVCS 32 U1 S2 W 250 11
F3 CVCS 32 N S2 10
F3-CVCS-32-D3-B29-10
CVCS 40 A S2 W 10
CVCS 40 A B29 W 10
CVCS-40-A3-B29-W-10
CVCS-40-C-B29-W-350-11
CVCS-40-C-S2-W-250-11
CVCS-40-C1-S2-W-250-11
CVCS-40-C3-B29-W-250-11
CVCS 40 C3 B29 M 250 11
CVCS 40 D1 S2 10
CVCS-40-D3-B29-10
CVCS-40-DC3-B29-10
CVCS-40-W-B29-10
CVCS 40 W13 B29 10
CVCS 40 PC B29 10
CVCS 40 N S2 10
CVCS 40 N B29 10
CVCS-40-HFV3-W-B29-10
CVCS-40-X-B29-W-125-11
CVCS-40-X-B29-W-250-11
CVC 40 D3 B29 10
F3 CVCS 40 D3 B29 10
CVCS 50 A S2 W 10
CVCS-50-D3-S2-10-S39
CVCS 50 N S2 10
CVCS-50-HFV3-B2-10
CVCS-50-HFV3-W-B2-10
CVC 50 N B29 10
CVC-50-D5-B29-10-Z1-20
CVC 50 D5 B29 10
F3-CVC-50-D2-S2-10
CVCS 63 A B29 W 10
CVCS 63 A S2 W 10 X10
CVCS 63 A S2 W 10
CVCS 63 N S2 10
CVCS-63-HFV3-W-B2-10
CVC-63-D2-S2-10
F3 CVC 63 D2 S2 10
CVU 16 EFP1 B29 19 31
CVU-16-SWD-B29-M-10
CVU-16-SWD3-B29-L-10
F3-CVU-16-EFP1-B29-19-31
CVU 25 SWD B29 M 10
CVU 25 SWD B29 L 10
CVU 25 EFP1 B29 45 31
CVU-32-EFP1-B29-70-31
CVU 40 EFP1 B29 90 31
CBV1-10-C-0-A-30/20
CBV1-10-C-0-A-30/
CBV1-10-S-0-A-30/
CBV1-10-S-0-A-50/
CBV1 10 S DA3G A 30/
CBV1-10-S-DA3G-A-30/13
CBV1-10-C-DA3G-A-30/11
CBV1 10 K PS3G A 30/22
CBV1 12 C 0 A 50/
CBV1 12 S 0 A 30/
CBV1 12 S 0 B 30/
CBV1 12 S 0 B 50/
CBV1-12-C-IA4G-A-30/
CBV2-10-S-IA3G-A-30/10
CBV2-10-S-0-A-50/
CBV2-10-C-0-A-50/
CRV-10V-S-A8T-36/
CV1-10-B-0-5
CV1-10-P-0-5
CV1 10 P 0 30
CV1-10-P-0-15
CV1-16-P-0-5
CV1-16-P-0-20
CV1 16 P 0 50
CV1-16-P-0-30
CV1-16V-P-0-5
CV2 20 P 0 15
CV2 20 P 0 30
CV2 20 P 0 60
CV3-8-P-0-004
CV3-8-P-0-010
CV3-8-P-0-025
CV3 8V P 0 004
CV3-10-P-0-3
CV3-10-P-0-10
CV3 10 P 0 20
CV11-12-P-0-40
CV11-12-P-0-20
CV11-12-P-0-2.5
CV11-12-P-0-10
CV11-12-P-0-5
DPC1 10S P 3B
DPC1-10S-P-6T
DPS2-10-B-S-0-40
DPS2-10-B-F-0-80
DPS2-10-B-S-0-80
DPS2 10 P F 0 80
DPS2 10 F F 0 160
DPS2 10 T F 0 20DPS2-10-T-F-0-160
DPS2 16 V F 0 80
DPS2 16 F F O 160
DPS2-16V-V-F-0-80
DPS2-20-T-F-0-40
DPS2-3457
DSV1-10-B-0
DSV2-8V-B-0
DSV2-8-B-0
DSV3-6-B-S1
DSV3-8-B-S2
DSV3-12-B-A4
DSV4 10 C 0 80
EPRV1-16-5.00-0-24DG
EPV10 24D M U 10
EPV10 24D U 10
EPV16-A-06-24D-U-13
EPV16-A-10-24D-S-U-13
EPV16-A-10-S-5C-24D-S-U-
EPV16-A-16-24D-M-U-12
EPV16-B-04-24D-M-U-13
EPV16-B-10-24D-S-U-13
EPV16-B-10-S-5C-24D-M-U-
EPV16-B-10-S-5C-24D-S-U-
EPV16-B-11-24D-S-U-13-S2
EPV16-B-12-24D-S-U-13-S1
ERV1 16 30.00 0 24DG
FAR1 10 S 0 10
FAR1 10 S 0
FAR1-10V-S-0
FAR1 12 S 0
FAR1 12 S 0 25
FAR1 16 S 0
FAR1 16 S 0 30
FCV6-16-K-0-NV
FCV6-16-S-0-NV
FCV7-10-C-0-NV
FCV7 10 C 0 NVF
FCV7 10 S 0 NV
FCV7 10 K 0 NV
FCV7 10 S 0 FF
FCV7 10 C 0 FF
FCV7-10-C-0-40
FCV7 10 S 0 40
FCV11-12-S-0-NV
FDC1-10-6T-22
FDC1 10 3B-66
FDC1-10-6T-33
FDC1 10 3G 22
FDC1 10 3G 11
FDC1 10 3B 22
FDC1-10-3B-11
FDC1 10 2G 66
FDC1 10 0 44
FDC1 10 0 11
FDC1 10 0 22
FDC1 16 0 44
FDC1 16 0 88
FDC1-16-6B-66
FDC1-16-6B-88
FDC1-16-12T-34
FDC1-20-16T-36
FR2 16 S 0 30.00
FR2-16-S-0-/22.00
FR2 16 S 0 /16.00
FR2-16V-S-0-/30.00
FT1 8 2 AS 8070
MCV5-10-C-A-100-12T-25/
MCV5-10V-S-B-100-12T-25/
MRV2 16 K 6G 45
MRV5-10-E-6T
MSCD-5314
NV1-8-S-0
NV1 8 K 0
NV1-10-K-2G
NV1-10-R-0
NV1 10 K 0
NV1-16-K-0
NV1 20 K 0
PCS3-10-0-80
POC1 10 F 0 005
POC1 10 F 0 030
POC1 10 F 0 075
POC1 10 F 0 100
POC1 10 S 0 100
POC1 12 F 0 030
POC1 12 F 0 075
POC1 12 S 0 100
PFR2-10-S-3G-/6.00
PRV1-10-S-0-6/
PRV1-10-S-0-12/
PRV1-10-K-2G-6/5
PRV2 10 C 0 20
PRV2-10-C-0-35/
PRV2-10-S-0-20/12.5
PRV2 10 S 0 3
PRV2 10 S 0 20
PRV2 10 S 0 35
PRV2-10V-S-0-20/
PRV2-16-S-0-30/
PRV2 16 C 0 30
PRV2-16-S-12T-30/
PRV11-12-S-0-30/
PRV11-12-S-0-15/
PRV12 10 I 0 15/4
PRV12-12-S-0-30/
PSV2 10 C 0 24
PSV7 10 S 0 10
PSV10-10-S-0-12/7.5
PSV11-12-S-0-15/
PTS1-10-0-80
PTS2-10-0-40
PTS7-10-0-40
PTS7 10 0 160
PUV3 10 S 0 85 30
PUV3-10-S-0-90-30/
PUV3-10-S-0-85-30/25
RV1 8 S 0 36/
RV1 8 S 0 50/
RV1 8 C 0 50/
RV1-8-K-A2G-36/
RV1-8V-S-0-36/
RV1-10-C-0-30/28
RV1-10-K-2G-18/18
RV1-10-I-0-9/5
RV1-10-S-0-36/36
RV1 10 S 2G 9/4.5
RV1-10-S-0-30/
RV1 10 C 0 18
RV1-10-C-0-30/
RV1-10-S-0-9/
RV2 10 S 0 35
RV2-10-S-0-50/
RV3-10-S-0-6/2.1
RV3-10-S-0-36/30
RV3-10-S-0-36/18.5
RV3 10 S 0 18
RV3 10 S 0 36
RV3 10 C 0 18
RV3 10 S 0 6
RV3 10 C 0 36
RV3-10V-S-0-3/
RV3A-10-S-0-36/
RV3-16-S-0-35/30
RV3-16-S-0-35/
RV3 16 S 0 50
RV3 16 S 0 13
RV4-10-F-0-50/20
RV4-10-F-0-50/10
RV5 10 S 0 50
RV5 10 C 0 50
RV5-10-S-0-35/
RV5 16 S 0 30
RV5-16-S-0-60/
RV5-10-S-8H-20/
RV5-10-K-3G-50/
RV5-10-S-8H-3/
RV5 16 S 0 50/
RV6-10-K-0-25/
RV8 8 S 0 50/
RV8 8 S 0 30/
RV8-8-C-0-50/
RV8-8-K-0-15/
RV8 10 C 0 50
RV8 10 S 0 50
RV8 10 S 0 25
RV8-10-S-0-12/
RV8-10V-I-0-50/
RV8A-10-K-0-50/
RV8A-10V-S-0-25/20
RV11-12-S-0-50/35
RV11-12-S-0-50/
RV11-12-S-0-50/33
RV11-12-S-0-30/
RV11-12-C-0-50/30
SBV11 8 C S3G 24DGP
SBV11 8 C 0 240AGP
SBV11 8 0 0 24DGP
SBV11-10-C-0-00
SBV11-10-C-0-24DGH
SBV11-10-0-0-24DGH
SBV11 12 0 0 24DGH
SBV11-12-C-0-24DGH
SBV11-12-C-0-00
SPC2 8V P 0 15
SPC2 8 P 0 15
SPC2 8 P 0 35
SPC2 10 P 0 50
SV1-8-3-0-24DWS
SV1 10 4 0 24DG
SV1-10-C-0-115AP
SV1E 10 3 0 230AU
SV1E-10-3-0-24DU
SV1-16-C-6G-24DW
SV1-16-C-12H-115AP
SV1 16 C 6G 24DG
SV2 20C 8G 24DG
SV2 20 C 0 24DG
SV3-10-C-0-00
SV3 10 0 0 24DG
SV3-10-C-8H-115AP
SV3-10-C-0-24DW
SV3-10-C-0-115AP
SV3-10-C-O-24DG
SV3 10 C 0 230AG
SV3-12-C-0-24DG
SV3-12-0-0-24DG
SV3 12 CM 0 24DG
SV3-20-0P-0-24DG
SV4 8 3 0 24DGS
SV4 8 3 A2G 24DGS
SV4-8-3M-0-24DGS
SV4-10V-C-6T-230AP
SV4-10-3-0-24DW
SV4 10 0 3B 24DG
SV4-10-C-0-00
SV4 10 C 0 24DG
SV4 10 C 0 115AG
SV4 10 C 0 230AG
SV4 10 0 0 24DG
SV4 10 3 0 24DG
SV4 10V 0 0 220AG
SV4 10V C 0 220AG
SV4-10V-CM-0-120AG
SV4 10 0M 0 24DG
SV5 8 C 0 00
SV5 8 0 0 00
SV5 10 0 0 00
SV910NF0000024DGJ0000A
SV11-8-3-0-24DGP
SV13-10-0-0-24DGH
SV13-10-0-0-240AGH
SV13-10-0P-0-00
SV13-10-CM-0-00
SV13-10-C-0-24DGH
SV13-10-CM-0-24DGH
SV13 10 0S 0 24DGH
SV13 12 CM 0 24DGH
SV13 12 0P 0 24DGH
SV13-12-0P-0-00
SV13-16-0-0-24DGH
SV13-16-0P-0-00
SV13-16-CM-0-00
SV14-10-0M-0-00
SV14-10-CM-0-00
SV14-10-0-0-240AGH
SV15-8-C-0-24DGP