ATOS比例溢流閥AGMZO-A-10/100液壓裝置中容易產(chǎn)生噪聲的元件一般認(rèn)為是泵和閥，閥中又以溢流閥和電磁換向閥等為主。產(chǎn)生噪聲的因素很多。溢流閥的噪聲有流速聲和機(jī)械聲二種。流速聲中主要由油液振動(dòng)、空穴以及液壓沖擊等原因產(chǎn)生的噪聲。機(jī)械聲中主要由閥中零件的撞擊和磨擦等原因產(chǎn)生的噪聲。
（1）壓力不均勻引起的噪聲
先導(dǎo)型溢流閥的導(dǎo)閥部分是一個(gè)易振部位如圖3所示。在高壓情況下溢流時(shí)，導(dǎo)閥的軸向開口很小，僅0.003～0.006厘米。過流面積很小，流速很高，可達(dá)200米/秒，易引起壓力分布不均勻，使錐閥徑向力不平衡而產(chǎn)生振動(dòng)。另外錐閥和錐閥座加工時(shí)產(chǎn)生的橢圓度、導(dǎo)閥口的臟物粘住及調(diào)壓彈簧變形等，也會(huì)引起錐閥的振動(dòng)。所以一般認(rèn)為導(dǎo)閥是發(fā)生噪聲的振源部位。
由于有彈性元件（彈簧）和運(yùn)動(dòng)質(zhì)量（錐閥）的存在，構(gòu)成了一個(gè)產(chǎn)生振蕩的條件，而導(dǎo)閥前腔又起了一個(gè)共振腔的作用，所以錐閥發(fā)生振動(dòng)后易引起整個(gè)閥的共振而發(fā)出噪聲，發(fā)生噪聲時(shí)一般多伴隨有劇烈的壓力跳動(dòng)。
（2）空穴產(chǎn)生的噪聲
當(dāng)由于各種原因，空氣被吸入油液中，或者在油液壓力低于大氣壓時(shí)，溶解在油液中的部分空氣就會(huì)析出形成氣泡，這些氣泡在低壓區(qū)時(shí)體積較大，當(dāng)隨油液流到高壓區(qū)時(shí)，受到壓縮，體積突然變小或氣泡消失；反之，如在高壓區(qū)時(shí)體積本來較小，而當(dāng)流到低壓區(qū)時(shí)，體積突然增大，油中氣泡體積這種急速改變的現(xiàn)象。氣泡體積的突然改變會(huì)產(chǎn)生噪聲，又由于這一過程發(fā)生在瞬間，將引起局部液壓沖擊而產(chǎn)生振動(dòng)。先導(dǎo)式溢流閥的導(dǎo)閥口和主閥口，油液流速和壓力的變化很大，很容易出現(xiàn)空穴現(xiàn)象，由此而產(chǎn)生噪聲和振動(dòng)。AGMZO-A-10/100/Y 20 

AGMZO-A-10/210
AGMZO-A-10/210 20
AGMZO-A-10/210/18
AGMZO-A-10/210/6 20
AGMZO-A-10/210/E
AGMZO-A-10/210/Y
AGMZO-A-10/315
AGMZO-A-10/315 20
AGMZO-A-10/315/E 20
AGMZO-A-10/315/Y
AGMZO-A-20/210
AGMZO-A-20/315
AGMZO-A-20/315/18
AGMZO-A-20/315/Y
AGMZO-A-20/315/Y/18
AGMZO-A-32/315
AGMZO-A-32/315 20
AGMZO-A-32/315/Y
AGMZO-AE-10/100/I 10
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-10/210 40
AGMZO-TER-10/210/EI
AGMZO-TER-10/210/F 40
AGMZO-TER-10/210/I
AGMZO-TER-10/210/I
AGMZO-TER-10/315 40
AGMZO-TER-10/315/I 40/PE  
AGMZO-TER-10/315/Y 40  
AGMZO-TER-20/210
AGMZO-TER-20/315/Y 40
AGMZO-TERS-010/210/I
AGMZO-TERS-10/100
AGMZO-TERS-10/100/I
AGMZO-TERS-10/210
AGMZO-TERS-10/210/EI
AGMZO-TERS-10/210/I
AGMZO-TERS-10/315 40
AGMZO-TERS-10/315/I
AGMZO-TERS-10/315/I 40/PE
AGMZO-TERS-10/315/Y 40  
AGMZO-TERS-20/210
AGMZO-TERS-20/315/Y 40
AGMZO-TERS-PS-010/210/I
AGMZO-TERS-PS-10/100 52
AGMZO-TERS-PS-10/210
AGMZO-TERS-PS-10/210/ I 50
AGMZO-TERS-PS-10/210/I
AGMZO-TERS-PS-10/210/I 53
AGMZO-TERS-PS-10/315 53
AGMZO-TERS-PS-32/315
AGRCZO-A-010/100
AGRCZO-A-010/100/P
AGRCZO-A-010/315
AGRCZO-A-10/100 20
AGRCZO-A-10/100/P 10
AGRCZO-A-10/100/P 20
AGRCZO-A-10/210
AGRCZO-A-10/210 10
AGRCZO-A-10/210 20
AGRCZO-A-10/210/P 10
AGRCZO-A-10/315 10
AGRCZO-A-10/315/P 10
AGRCZO-A-20/100 20
AGRCZO-A-20/210/R
AGRCZO-A-20/210/R 10  
AGRCZO-AE-10/100 20
AGRCZO-AE-10/100/IR 20
AGRCZO-AE-10/210 10
AGRCZO-AE-10/50 10
AGRCZO-AE-10/50 10
AGRCZO-AE-20/210/P
AGRCZO-AE-20/315/I 20
AGRCZO-AES-PS-10/210/Z 20
AGRCZO-TER-10/315 40
AGRCZO-TER-10/315 40
AGRCZO-TERS-10/315 40
AGRCZO-TERS-PS-10/210 53
AGRCZO-TERS-PS-10/315/I 53
HZMO-A-030/210 40
HZMO-A-030/210 40
HZMO-A-030/210 40   
HZMO-A-030/210-40
HZMO-A-033/210
HZGO-A-031/100
HZGO-A-031/100 31
HZGO-A-031/100 31
HZGO-A-031/210 31
HZGO-A-031/210 31
HZGO-A-031/210 31
HZGO-A-031/315 31
HZGO-A-031/315 31  
HZGO-A-031/315 31  
HZGO-A-031/315/18 31