ATOS溢流閥是一種液壓壓力控制閥，在液壓設(shè)備中主要起定壓溢流作用，穩(wěn)壓，系統(tǒng)卸荷和安全保護(hù)作用。
定壓溢流作用：在定量泵節(jié)流調(diào)節(jié)系統(tǒng)中，定量泵提供的是恒定流量。當(dāng)系統(tǒng)壓力增大時(shí)，會(huì)使流量需求減小。此時(shí)溢流閥開(kāi)啟，使多余流量溢回油箱，保證溢流閥進(jìn)口壓力，即泵出口壓力恒定（閥口常隨壓力波動(dòng)開(kāi)啟）。
穩(wěn)壓作用：溢流閥串聯(lián)在回油路上，溢流閥產(chǎn)生背壓，運(yùn)動(dòng)部件平穩(wěn)性增加。
系統(tǒng)卸荷作用：在溢流閥的遙控口串接溢小流量的電磁閥，當(dāng)電磁鐵通電時(shí)，溢流閥的遙控口通油箱，此時(shí)液壓泵卸荷。溢流閥此時(shí)作為卸荷閥使用。
安全保護(hù)作用：系統(tǒng)正常工作時(shí)，閥門關(guān)閉。只有負(fù)載超過(guò)規(guī)定的極限（系統(tǒng)壓力超過(guò)調(diào)定壓力）時(shí)開(kāi)啟溢流，進(jìn)行過(guò)載保護(hù)，使系統(tǒng)壓力不再增加（通常使溢流閥的調(diào)定壓力比系統(tǒng)zui高工作壓力高10%～20%）。
實(shí)際應(yīng)用中一般有：作卸荷閥用，作遠(yuǎn)程調(diào)壓閥，作高低壓多級(jí)控制閥，作順序閥，用于產(chǎn)生背壓（串在回油路上）。
ATOS溢流閥一般有兩種結(jié)構(gòu)：1、直動(dòng)型溢流閥 。2、先導(dǎo)式溢流閥。
對(duì)溢流閥的主要要求：調(diào)壓范圍大，調(diào)壓偏差小，壓力振擺小，動(dòng)作靈敏，過(guò)載能力大，噪聲小。
ATOS溢流閥部分型號(hào)：
RZMA-A-010/250/M 21
RZMA-A-030/180/M/7 21
RZMO-A-010/100
RZMO-A-010/210
RZMO-A-010/210/18 20
RZMO-A-010/315
RZMO-A-010/315/18
RZMO-A-010/50
RZMO-A-010/50/18
RZMO-A-030/100 20
RZMO-A-030/210 20
RZMO-A-030/210/18
AGMZA-A-10/250/M
AGMZA-A-10/250/PA-M
AGMZA-A-20/250/M
AGMZO-A-10/100
AGMZO-A-10/100/Y 20
AGMZO-A-10/210
AGMZO-A-10/210/18
AGMZO-A-10/210/E
AGMZO-A-10/210/Y
AGMZO-A-10/315
AGMZO-A-10/315/E 20
AGMZO-A-10/315/Y
AGMZO-A-20/210
AGMZO-A-20/315
AGMZO-A-20/315/Y
AGMZO-A-32/315
AGMZO-AE-10/210 10
AGMZO-AE-10/315 10
AGMZO-AE-20/315/Y 10
RZGA-A-010/210/M 20
RZGA-A-010/32/M/7 20
RZGA-A-033/80/M/7 31
RZGO-A-010/100 20
RZGO-A-010/210 20
RZGO-A-033/100
RZGO-A-033/210
RZGO-A-033/315 31
RZGO-AE-010/100 10
RZGO-AE-033/210 10
RZGO-TER-010/100
RZGO-TER-010/100/I 40
RZGO-TER-010/210 40
RZGO-TER-010/210/I 40
RZGO-TER-010/32 40
RZGO-TER-033/100
RZGO-TER-033/315 40
直動(dòng)式溢流閥
RZMA-A-010/250/M 21
RZMA-A-030/180/M/7 21
RZMO-A-010/100
RZMO-A-010/210
RZMO-A-010/210/18 20
RZMO-A-010/315
RZMO-A-010/315/18
RZMO-A-010/50
RZMO-A-010/50/18
RZMO-A-030/100 20
RZMO-A-030/210 20
RZMO-A-030/210/18
RZMO-A-030/315
RZMO-AE-010/315 10
RZMO-AE-030/100 40
RZMO-P1-010/100/18/MC 20
RZMO-P1-010/210
RZMO-P3-010/100/AM1NSA
RZMO-P3-010/100/I/AM1NSA
RZMO-P3-010/210/I/AM1NS
RZMO-P3-010/210/I/AMINSA
RZMO-TER-010/100 40
RZMO-TER-010/315 40
RZMO-TER-010/315/I 40
RZMO-TER-030/210 40
RZMO-TER-030/315/I 40
先導(dǎo)式溢流閥
AGMZA-A-10/250/M
AGMZA-A-10/250/PA-M
AGMZA-A-10/80/PA-GK 21
AGMZA-A-10/80/PA-GK/24 21
AGMZA-A-20/250/M
AGMZO-A-10/100
AGMZO-A-10/100/Y 20
AGMZO-A-10/210
AGMZO-A-10/210/18
AGMZO-A-10/210/E
AGMZO-A-10/210/Y
AGMZO-A-10/315
AGMZO-A-10/315/E 20
AGMZO-A-10/315/Y
AGMZO-A-20/210
AGMZO-A-20/315
AGMZO-A-20/315/Y
AGMZO-A-32/315
AGMZO-AE-10/210 10
AGMZO-AE-10/315 10
AGMZO-AE-20/315/Y 10
AGMZO-AE-32/315
AGMZO-TER-010/210/I
AGMZO-TER-10/100/I
AGMZO-TER-10/210
AGMZO-TER-10/315/Y 40
AGMZO-TER-20/210
AGMZO-TER-20/315/Y 40
先導(dǎo)式減壓閥
AGRCZO-A-10/100/P 10
AGRCZO-A-10/210 10
AGRCZO-A-10/210/P 10
AGRCZO-A-10/315 10
AGRCZO-A-10/315/P 10
AGRCZO-A-20/210/R 10
AGRCZO-AE-10/210 10
AGRCZO-AE-10/50 10
AGRCZO-AE-20/210/P
AGRCZO-TER-10/315 40
AGRZO-A-10/100/P
AGRZO-A-10/210/P
AGRZO-A-10/210/R
AGRZO-A-10/315
AGRZO-A-20/210/18
AGMZO-TER-10/210/EI
AGMZO-TER-10/210/I
AGMZO-TER-10/315 40
AGMZO-TER-10/315/I 40/PE
工作原理：電磁閥里有密閉的腔，在不同位置開(kāi)有通孔，每個(gè)孔連接不同的油管，腔中間是活塞，兩面是兩塊電磁鐵，哪面的磁鐵線圈通電閥體就會(huì)被吸引到哪邊，通過(guò)控制閥體的移動(dòng)來(lái)開(kāi)啟或關(guān)閉不同的排油孔，而進(jìn)油孔是常開(kāi)的，液壓油就會(huì)進(jìn)入不同的排油管，然后通過(guò)油的壓力來(lái)推動(dòng)油缸的活塞，活塞又帶動(dòng)活塞桿，活塞桿帶動(dòng)機(jī)械裝置。這樣通過(guò)控制電磁鐵的電流通斷就控制了機(jī)械運(yùn)動(dòng)。
比例換向閥
DHZA-A-051-S3/M/7 21
DHZA-A-051-S3/PA-GK/7
DHZA-A-051-S5/M/7 21
DHZA-A-071-L5/M/7 21
DHZO-A-051-S5
DHZO-A-051-S5/18
DHZO-A-053-L3 20
DHZO-A-053-L3/18
DHZO-A-053-L5
DHZO-A-053-L5/18
DHZO-A-060-S3
DHZO-A-071-L1 20
DHZO-A-071-L1/18
DHZO-A-071-L5
DHZO-A-071-L5/18 20
DHZO-A-071-S3 20
DHZO-A-071-S5
DHZO-A-073-D5
DHZO-A-073-D5/18
DHZO-A-073-L5
DHZO-A-073-S3 20
DHZO-A-073-S5
DHZO-AE-051-S5 10
DHZO-AE-071-D5/I
DHZO-AE-071-S5/I
DHZO-AE-073-D5/I 10
DHZO-AE-073-S5 10
DHZO-AE-073-S5/I 10
DHZO-AT-073-P3 20
DHZO-ATE-073-P3/B/DP27SB 20
DHZO-T-051-L1
DHZO-T-051-L5 31
DHZO-T-071-D5
DHZO-T-071-L5
DHZO-T-071-S5
DHZO-TE-051-L5/Y 40
DHZO-TE-071-L5
DHZO-TE-071-S5 40 /PE
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