單向閥是氣流只能一個(gè)方向流動(dòng)而不能反向流動(dòng)的方向控制閥。其工作原理與液壓?jiǎn)蜗蜷y一樣。壓縮空氣從P口進(jìn)入，克服彈簧力和摩擦力使單向閥閥口開(kāi)啟，壓縮空氣從P流至A；當(dāng)P口無(wú)壓縮空氣時(shí)，在彈簧力和A口（腔）余氣力作用下；閥口處于關(guān)閉狀 態(tài)，使從A至P氣流不通。單向閥應(yīng)用于不允許氣流反向流動(dòng)的場(chǎng)合，如空壓機(jī)向氣罐充氣 時(shí)，在空壓機(jī)與氣罐之間設(shè)置一單向閥，當(dāng)空壓機(jī)停止工作時(shí)，可防止氣罐中的壓縮空氣回流 到空壓機(jī)。單向閥還常與節(jié)流閥、順序閥等組合成單向節(jié)流閥、單向順序閥使用。

注意事項(xiàng)
　　安裝止回閥時(shí)，應(yīng)特別注意介質(zhì)流動(dòng)方向，應(yīng)使介質(zhì)正常流動(dòng)方向與閥體上指示的箭頭方向相*，否則就會(huì)截?cái)嘟橘|(zhì)的正常流動(dòng)。底閥應(yīng)安裝在水泵吸水管路的底端。

　　止回閥關(guān)閉時(shí)，會(huì)在管路中產(chǎn)生水錘壓力，嚴(yán)重時(shí)會(huì)導(dǎo)致閥門、管路或設(shè)備的損壞，尤其對(duì)于大口管路或高壓管路，故應(yīng)引起止回閥選用者的高度注意。

　　止回閥只供防止各類管路或設(shè)備上流體介質(zhì)逆流的單向啟閉閥。

插裝閥 DBDS6P1X/25
LC40DB20E-7X
LC40B 10E-7X
LC32DB20E7X
LC40B05E-7X
 蓋板 LFA40RF-7X/F12
 LFA50RF-7X/F12
 LFA25RF-7X/F12
LFA32D-7X/FX12
 LFA16 EWA-70/CA40D
 LFA40WEA-7X
 LFA63D-7X/F
 LFA32D-7X/FX12
 LFA16D-7X/FV
 LFA16D-711/FV
LFA25 EWMB68-7X/CA05EQMG24P15V
 LFA25D9-71/V 德
 LFA25WEMA5-65/V
 LFA32DRW2-71/315
 LFA32GWA-7X/P15
 LFA25E71/CA10DQMG24FX10
閥 LFA16D-7X/FV
 LFA16D-711/FV
LFA25 EWMB68-7X/CA05EQMG24P15V
 LFA25D9-71/V
 LFA25WEMA5-65/V
 LFA40H2-7X/F
 LFA32H2-7X/F
 LFA25E71/CA10DQMG24FX10
 LFA40H2-7X/F
 LFA32H2-7X/F
插裝閥體LFA32DBW-2-7X/420V/12

溢流閥DBDS10K-1X/200 DBDS6K-1X/100
DBDS6K-1X/100
DBDS20D1X/315 DBDS20K1X/200
DB10-5X/100 DB20-2-5X/315
DBW20B2N-52/100-6EG110N9K4
DBW30B2N-52/100-6AG-110N9K4
DBDS 20K1X/400
DB20-2-5X/315 DB30-2-5X/350
DBDS 30P1X/200
DB30G2-
DB30-2-5X/350 DBDS20K1X/200
ZDB 10 VB2-4X/200V
DBDS20K1X/200 DBDS6K-1X/100
DB30-2-5X/100U DB10-2-5X/100U
DB10-2-5X/100U
電磁溢流閥 DBW30-B2-5X/350-6EG24-
DBW20A2-5X/200EG24N9K4
DBW20A2-5X/200EG24N9K4+Z5L
DBW30R2-5X/1006AG110NK4
DBW30B2-5X/1006AG110NK4
DBW20B2-5X/1006AG110NK4
DBW10B2-5X/1006AG110NK4
疊加式溢流閥 DGMC-3-PT
ZDB6VP2-4X/100V Z2DB6VC2-4X/100V
Z2DB6VC2-4X/100V
ZDB10VA2-4X/100V ZDB10VB2-4X/100V
ZDB10VB2-4X/100V DR20-5-3X/200Y
ZDB6VB2-4X/100V ZDB10VA2-4X/100V
ZDB10VA2-4X/100V ZDR10DA2-5X/75Y
ZDR10DA2-5X/75Y
板式溢流閥 DB70-2-5X/100
先導(dǎo)型溢流閥 PB10-2-4X/100W65

減壓閥DR6DP2-5X/75YM DR-10-5-5X/100YM
DR-10-5-5X/100YM
ZDR 6 DPO-45/40YM W80
ZDR10DB2-5X/210YM
DR10-5-3X/200YM DR20-5-3X/200Y
DR20-5-3X/200Y DR20-5-3X/200YM
DR20-5-3X/200YM ZDB10VA2-4X/100V
DR20-5-5X/200Y DR20-5-5X/200YM
DR20-5-5X/200YM DR20-5-5X/200Y
ZDR10DB2-5X/75YM ZDR10DP2-5X/75YM
ZDR10DP2-5X/75YM
DR30-5-5X/200YM
DR3U20D5-5X/150Y6EG24N9K4+Z5L
單向減壓閥 DR30-5-5X/100Y
疊加式減壓閥 ZDRK10VP5-1X/100YMV
ZDR6DB2-4X/75YM
ZDR6DP2-4X/75YM ZDR6DA2-4X/150YM
ZDR6DA2-4X/150YM
ZDR6D-4X/25YM
ZDR10DB2-5X/75YM ZDR10DP2-5X/150YM
ZDR10DP2-5X/150YM
ZDR10DP2-5X/75YM
ZDR6DB2-4X/150YM ZDR6DP2-4X/150YM
ZDR6DP2-4X/150YM ZDR6DP2-4X/75YM
ZDR6DP2-4X/75YM
Z2DB6VC2-4X/100V ZDB10VB2-4X/100V
ZDB10VB2-4X/100V
ZDB6VB2-4X/100V ZDR6DB2-5X/75YM
ZDR6DB2-5X/75YM
ZDR10DA2-5X/150Y ZDR6DA2-4X/150Y
ZDR6DA2-4X/150Y ZDR6DB2-4X/150YM
ZDR6DP2-5X/150YMSV30PA1-4X/
ZDR10VB5-3X/100Y
板式減壓閥 DR-JO-5-5X/50YM

換向閥 4WEH22J7X/6EG24N9ETK4/B10
4WMM10E31
1WMM10J31
DG3V-8-8C
DG3V-3-2N
電磁換向閥 4WE10J3X/CG24N9K4
3DREP 6C-20=25EG24N9K4/M=00
4WE10J3X/CG24NK4
4WE6D5X/AG24NK4
4WE6J5X/AG24NK4 4WE6Y5X/AG24NK4
4WE6Y5X/AG24NK4
4WE10J3X/CG110N9K4
比例換向閥 4WRZE32W8-520-7X/6EG24NIETK31F1/D3M+Z31

節(jié)流閥 DV-10-01.1/0
DV-20-1-0.1/0
單向節(jié)流閥 Z2FS16-3X/S 2S10-5-3X
Z2FS6-5-4X/2QV Z2FS22-3X/S2
Z2FS22-3X/S2 2S10-5-3X 2S10-5-3X
2S10-5-3X
MK10G1X
雙單向節(jié)流閥 Z2FS10-2-3X/ Z2FS10-3X/
Z2FS10-3X/
Z2FS16-3X/S Z2FS6-2-4X/2QV
Z2FS6-2-4X/2QV
疊加式單向節(jié)流閥 Z2FS22-3X/S2 Z2FS10-3X
Z2FS10-3X 
Z2FS6-30B Z2FS10-5-3X
Z2FS10-5-3X
疊加式節(jié)流閥 Z2FS6-2-4X Z2FS6B2-4X/2QV
Z2FS6B2-4X/2QV
Z2FS10-5-3X Z2FS6A2-4X/2QV 
Z2FS6A2-4X/2QV
管式節(jié)流閥 MK10G1X 

單向閥 S20A1.0
M-SR KE 05-01X
M-SR52 KE 05-
M-SR30KE05-1X/
M-SR10KE05-1X
M-SR15KE05-1X/
M-SR20KE05-1X
M-SR25KE02-1X
Z1S6P1-2X 
M-SR25KE05-1X
M-SR10KE05
M-SR20KE05
M-SR25KE05
M-SR25KE05-1X/
S15A1
S15A1.0
S20A1 S15A1.0 S25A1 S30A1
S25A1
S30A1
S6A0.0/ R900422880
S6A1.0/ R900422881    S6A0.0/ S6A5.0/ S8A1.0/
S6A5.0/ R900375858
S8A0.0/ R900422885
S8A1.0/ R900422886
S8A3.0/ R900422888
S8A5.0/ R900358268
S10A0.0/ R900420530
S10A1.0/ R900420531
S10A2.0/ R900420532   S10A0.0 S10A1.0 S10A2.0
S10A3.0/ R900420534
S10A5.0/ R900446476
S15A0.0/ R900420536
S15A1.0/ R900420537
S15A2.0/ R900420520
S15A3.0/ R900420521   S15A1.0 S15A3.0 S20A0.0
S15A5.0/ R900446477
S20A0.0/ R900420524
S20A1.0/ R900420525
S20A2.0/ R900420528
S20A3.0/ R900420529
S20A5.0/ R900446369
S25A1.0/ R900420511   S25A1.0 S25A3.0 S30A0.0
S25A3.0/ R900420515
S25A5.0/ R900451778
S30A0.0/ R900420517
S30A1.0/ R900420519   S30A5.0 S30A0.0 S30A2.0 S30A3.0/
S30A2.0/ R900420502
S30A3.0/ R900420504
S30A5.0/ R900446709
Z1S10D1-3X/V R900417595
Z1S10E1-3X/V R900417596
Z1S10F1-3X/V R900417597
Z1S10P1-3X/V R900417590
Z1S10T1-3X/V R900417591
Z1S10T2-3X/V R900334980
Z2S6-1-6X Z2S6-2-6X/ R900347495
Z2S6-2-6X/ R900347496
Z2S6-3-6X/ R900347497
Z2S6A1-6X/ R900347498
Z2S6B1-6X/ R900347501
Z2S10-1-3X/Z2S10-2-3X R900407394
Z2S10-2-3X/ R900421985
Z2S10A1-3X/ R900407424
Z2S10B1-3X/ R900407434
Z2S16-1-5X/ R900328797
Z2S16A1-5X/ R900328798
Z2S16B1-5X/ R900328799
Z2S22 -1-5X/ R900432915
Z2S22 A1-5X/ R900433032
/ R900433037
SLPB1-6X/ R900491117
SV6PB1-6X/ R900494086
SL10GA1-4X/ R900483370
SL10GB1-4X/ R900451135
SL10PA1-4X/ R900483371
SL10PB1-4X/ R900443419
SL15GA1-4X/ R900587553
SL20PA1-4X/ R900587559
SL20PB1-4X/ R900599586
SL25GA1-4X/ R900587555
SL30GA1-4X/ R900587556
SL30PA1-4X/ R900587560
SV10GA1-4X/ R900483368
SV10GB1-4X/ R900453511
SV10PA1-4X/ R900483369
SV10PB1-4X/ R900467724
SV15GA1-4X/ R900587549
SV20GA1-4X/ R900587550
SV20PA1-4X/ R900587557
SV25GA1-4X/ R900587551
SV30GA1-4X/ R900587552
SV30PA1-4X/ R900587558
M-SR6KD05-1X/ R900301889
M-SR8KE02-1X/ R900357438
M-SR8KE05-1X/ R900346083
M-SR10KE05-1X/ R900344549
M-SR15KE02-1X/ R900348943
M-SR15KE05-1X/ R900345372
M-SR20KE02-1X/ R900345744
M-SR20KE05-1X/ R900340979
M-SR25KE05-1X M-SR30KE05-1X R900344778
M-SR30KE05-1X/ R900344919

管式單向閥 S6A1
先導(dǎo)式單向閥 SL20 PA1-42
液控單向閥 SL30 PA2-4X
SV10 PA1-42
疊加式單向閥 Z1S 10 DI-33 
Z1S 10 EI-33 
Z1S 10 EI-33  W4
液控單向閥 Z2S16-1-5X Z2S16A-1-5X
Z2S16A-1-5X
Z2S16B-1-5X Z2S6-1-6X Z2S16A-1-5X
Z2S6-1-6X Z2S22-1-5X
SL30PA1-4X
Z2S22-1-5X Z2S16-1-5X
SL10PA1-42
SL30 PA2-4X SV10 PA1-42
SV10 PA1-42
Z2S16-1-5X Z2S16A1-5X
Z2S16A1-5X
Z2S6-1-6X Z2S6B1-6X Z2S16-1-5X
Z2S6B1-6X
Z2S16-1-5X Z2S10A-1-3X
Z2S10A-1-3X
SV30PA1-4X/
插裝式單向閥 M-SR25KE-05-1X
疊加式單向閥 Z1S6P1-3X W4
Z2S6-1-6X
疊加式液控單向閥 Z2F-22-1-5X
Z2SRK6-1 1X/Y
Z2S10-1-3X

節(jié)流插裝閥控制蓋 LFA 40 H2-71/FX15

二通插裝閥控制蓋 LFA 63 WEB-71X

二通插裝閥插 LC63A05E-71X
液壓電磁閥電磁鐵插頭 M-3SEW6C3X/420MG24N9K4
節(jié)流插裝閥插件 LC40 A 05D-7X
方向插件NG25 LC25A20E7X
方向插件NG63 LC63A20E7X

疊加板 HSZ06A608-30/M00

整流疊加板 Z4S16-2X/

控制蓋板 LFA40D-71/FX12
LFA 40 DB2-71/200
壓力蓋板NG25 LFA25DB2-7X/200
壓力蓋板NG63 LFA63WEA-7X/A2P2

二通流量控制閥 2FRM-32/100L
平衡閥 FD32PA21/300V
FD25PA3X/B60
調(diào)速閥 2FRM10-3X/25
2FRM10-3X/50LB 2FRM10-3X/25
比例閥 4WRA6030-28/G24N9K4 -589
順序閥 DZ30-2-5X/200Y
壓力限位閥 ZDB10VP2-4X/315
壓力補(bǔ)償器 ZDC10P-2X/M
壓力繼電器 HED30A3X/400KL24Q

電磁換向閥 4WE6D7X/HG24N9K4 4WE6C7X/HG24N9K4
電磁換向閥 4WE6C7X/HG24N9K4
電磁換向閥 4WE6E7X/HG24N9K4 4WE6J7X/HG24N9K4
電磁換向閥 4WE6J7X/HG24N9K4
電磁換向閥 4WE6M7X/HG24N9K4 4WE6HB7X/HG24N9K4
電磁換向閥 4WE6HB7X/HG24N9K4
電磁換向閥 4WE6JA7X/HG24N9K4 4E6EA7X/HG24N9K4
電磁換向閥 4E6EA7X/HG24N9K4
電磁換向閥 4E6EB7X/HG24N9K4 4E6L7X/HG24N9K4
電磁換向閥 4E6L7X/HG24N9K4
電磁換向閥 4WE6Y7X/HG24N9K4 4WE6D6X/EG24N9K4
電磁換向閥 4WE6D6X/EG24N9K4
電磁換向閥 4WE6C6X/EG24N9K4 4WE6E6X/EG24N9K4
電磁換向閥 4WE6E6X/EG24N9K4
電磁換向閥 4WE6J6X/EG24N9K4 4WE6Y6X/EG24N9K4
電磁換向閥 4WE6Y6X/EG24N9K4
電磁換向閥 4E6G6X/EG24N9K4
電磁換向閥 4WE6H6X/EG24N9K4 4WE6U6X/EG24N9K4
電磁換向閥 4WE6U6X/EG24N9K4
電磁換向閥 4WE6D/OFEG24N9K4
電磁換向閥 4WE6EA6X/EG24N9K4 4WE6EB6X/EG24N9K4
電磁換向閥 4WE6EB6X/EG24N9K4
電磁換向閥 4WE6HB6X/EG24N9K4 4WE6HA6X/EG24N9K4
電磁換向閥 4WE6HA6X/EG24N9K4
電磁換向閥 4WE6U6X/EG24N9K4
電磁換向閥 4WE6R73-6X/EG24N9K4/A12
電磁換向閥 3WE6A6X/EG24N9K4    
電磁換向閥 4WE10Y3X/CG24N9K4
電磁換向閥 4E10D3X/CG24N9K4
電磁換向閥 4WE10EA3X/CG24N9K4 4WE10EB3X/CG24N9K4
電磁換向閥 4WE10EB3X/CG24N9K4
電磁換向閥 4WE10E3X/CG24N9K4 4WE10L3/CG24N9K4
電磁換向閥 4E10J3X/CG24N9K4
電磁換向閥 4WE10L3/CG24N9K4
電磁換向閥 4WE10U3X/CG24N9K4 4WE10G3X/CG24N9K4
電磁換向閥 4WE10G3X/CG24N9K4
電磁換向閥 4WE10F3X/CG24N9K4
電磁換向閥 4WE10M3X/CG24N9K4
電磁換向閥 4WE6D6X/EW230N9K4