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美國(guó)ASCO阿斯卡流體控制閥原裝流體控制是利用流體的各種控制元件（各種泵、閥門、油缸）及液壓系統(tǒng)附件（過(guò)濾器、管路接頭、液位計(jì)、壓力儀表等），組成控制閉式回路，以進(jìn)行自動(dòng)控制。按其工作介質(zhì)可分為以下兩種：
（1）液壓控制 液壓控制用油液作為工作介質(zhì)，故能把由于功率的損耗而產(chǎn)生的熱量，從發(fā)生的地方帶到別處，這樣在一定的功率情況下，可以大大減小部件的尺寸；從負(fù)載的影響看，液壓系統(tǒng)具有機(jī)械上的剛性，用在閉環(huán)系統(tǒng)中，定位剛度較大，位置誤差較小；與機(jī)械機(jī)構(gòu)相比，液壓執(zhí)行器的響應(yīng)速度較高，能高速啟動(dòng)、制動(dòng)與反向，同時(shí)其力矩—慣量比也較大，因而其加速能力較強(qiáng)；液壓傳動(dòng)易實(shí)現(xiàn)無(wú)級(jí)調(diào)速，具有自身潤(rùn)滑等優(yōu)點(diǎn)。
液壓系統(tǒng)的缺點(diǎn)是：由于難以避免漏油，因而會(huì)影響運(yùn)動(dòng)的平穩(wěn)性，并使效率降低；油液被塵埃或流體截止中其他雜質(zhì)污損后，會(huì)造成液控系統(tǒng)發(fā)生故障；油液具有易燃性，有引起爆炸的危險(xiǎn)；液體粘度受溫度影響，使供油量和執(zhí)行機(jī)構(gòu)的運(yùn)動(dòng)速度不穩(wěn)定；油液中有空氣會(huì)引起工作機(jī)構(gòu)的不均勻跳動(dòng)；就處理小功率信號(hào)的數(shù)學(xué)運(yùn)算、誤差檢測(cè)、放大、測(cè)試與補(bǔ)償?shù)裙δ芏裕簤貉b置不如電子或機(jī)電裝置那樣靈活、線性、準(zhǔn)確和方便，因而在控制系統(tǒng)的小功率部分，一般不宜采用，主要應(yīng)用于系統(tǒng)的動(dòng)力部分。
（2 氣動(dòng)控制 氣動(dòng)控制與液壓控制相比，動(dòng)作迅速、方便，使用的元件和工作介質(zhì)成本低，便于現(xiàn)有機(jī)器設(shè)備的自動(dòng)化改裝，已經(jīng)在上得到很大發(fā)展，成為熱點(diǎn)之一。氣動(dòng)控制的缺點(diǎn)，是運(yùn)動(dòng)不平穩(wěn)，有噪音，控制元件的體積較大。

美國(guó)ASCO阿斯卡流體控制閥原裝按照標(biāo)準(zhǔn)設(shè)計(jì)和生產(chǎn)，電磁閥產(chǎn)品可滿足各種應(yīng)用的需要，控制不同液態(tài)及氣態(tài)流體，并提供廣泛的選擇：其介質(zhì)可以是易燃、易爆或腐蝕性的；壓力可達(dá)到150巴；溫度可以從-50C到300C；口徑從1/8英寸至6英寸，產(chǎn)品包括普通型、防爆型、手動(dòng)復(fù)位、本安型、滑動(dòng)式、長(zhǎng)壽型、蒸汽/熱水及氣控閥。其出色的防爆性能廣泛應(yīng)用于石化、電廠等行業(yè)。

一種止回閥(3)，尤其是一種小便器閥，其包括一部件(4)，所述部件(4)具有一由一彈性材料制成的扁平片件(6)，所述片件(6)與一自支承的槽形部分的一端(5)端接，以及一設(shè)有一表面使所述片件(6)的另一端可靠在所述表面上密封的互補(bǔ)部件。所述互補(bǔ)部件如同一鏡像那樣做成與所述部件(4) 相同的結(jié)構(gòu)。

流體控制是利用流體的各種控制元件（各種泵、閥門、油缸）及液壓系統(tǒng)附件（過(guò)濾器、管路接頭、液位計(jì)、壓力儀表等），組成控制閉式回路，以進(jìn)行自動(dòng)控制。

型號(hào)如下：

 ASCO V VALVE
 ASCO 027476-001-D-120 COIL 115/60 FOR SOLENOID VALVE
 ASCO 027476-002-D-240 COIL 230/60 FOR SOLONOID VALVE
 ASCO 64982001 COIL
 ASCO 064982-002-D REPLACEMENT COIL FOR SOLENOID
 ASCO 064-982-004-D COIL 120VAC
 ASCO 064982-004-D-120 COIL KIT
 ASCO 064982-005-D COIL FOR SOLENOID VALVE 240V FT
 ASCO 064982-006-D REPAIR KIT
 ASCO 064-982-5-D COIL FOR SOLENOID VALVE 240V FT
 ASCO 066611-002-D COIL REPLACEMENT 120VDC
 ASCO 067179-002-240 COIL SWITCH KIT
 ASCO 068-038 KIT SOLENOID VALVE
 ASCO 90683 KIT SOLENOID VALVE
 ASCO 93609 REPAIR KIT
 ASCO 096619-001-D REPLACEMENT COIL
 ASCO 096619-002-D COIL
 ASCO 096817-001-D-120 COIL KIT 110/50 120/60
 ASCO 096-875 KIT SOLENOID VALVE
 ASCO 97813 VALVE
 ASCO 099-216-001-D-120 COIL 120VAC
 ASCO 099216002D COIL
 ASCO 099216-003-D-120 COIL
 ASCO 099216005D COIL
 ASCO 099257001D COIL
 ASCO 099257-001-D-120 COIL REPLACEMENT 120V 60HZ
 ASCO 099257-005-D COIL 120VAC WITH 18IN LEADS
 ASCO 099257-005-D-120 COIL KIT 120VAC
 ASCO 099257-006-D-240 COIL KIT
 ASCO 099257006D240V COIL
 ASCO 100424 MAINTENANCE KIT FOR VALVE
 ASCO 100-691 KIT VALVE REPAIR
 ASCO 100-833-5D-24DC COIL REPLACEMENT 24 VDC
 ASCO 102-839 KIT VALVE REPAIR
 ASCO 102-855 REPAIR KIT
 ASCO 103-833-005-D-120 COIL REPLACEMENT FOR VALVE
 ASCO 103-832-005-D-12/24DC COIL REPLACEMENT FOR VALVE 12/24VDC
 ASCO 103-833-005-D COIL 24 VDC
 ASCO 103-833-005-D-24DC VALVE COIL 24VDC
 ASCO 10700127 VALVE
 ASCO 108D10C PANEL
 ASCO 1125892 VALVE 1/4 3 WAY 120VAC
 ASCO 11490516 SOLENOID
 ASCO 1179237 VALVE 1/8 PIPE 120VAC 200 PSI
 ASCO 1179237-110 VALVE 1/8 3PORT
 ASCO 12600008 SOLENOID VALVE
 ASCO 131201 REBUILD KIT
 ASCO 131204 REBUILD KIT
 ASCO 158929 VALVE REPAIR KIT
 ASCO 158-959 VALVE REPAIR KIT
 ASCO 160098 REPAIR KIT
 ASCO 160855 REPAIR KIT
 ASCO 164-931 VALVE REPAIR KIT
 ASCO 16500089 VALVE
 ASCO 166-249 REPAIR KIT
 ASCO 16630C CONTACTOR WITH ENCLOSURE 120VAC COIL 3POLE
 ASCO 168-134-5 COIL REPLACEMENT
 ASCO 168699 REPAIR KIT
 ASCO 168858 REPAIR KIT
 ASCO 172827 REPAIR KIT
 ASCO 172828 KIT
 ASCO 174038 REPAIR KIT
 ASCO 174957-001 COIL 120V
 ASCO 176-447 REPAIR KIT
 ASCO 176-911 KIT BULL F210
 ASCO 178-417 VALVE KIT
 ASCO 178-418 VALVE KIT
 ASCO 180-466 VALVE
 ASCO 18193 FLAME ROD
 ASCO 182032 REPAIR KIT
 ASCO 19000006 24VDC
 ASCO 190073 SOLENOID VALVE 24VDC
 ASCO 19200002 VALVE
 ASCO 197660 RELAY
 ASCO 1982182D COIL
 ASCO 204-556-001 COIL REPLACEMENT KIT
 ASCO 204-558-001 VALVE COIL KIT
 ASCO 204-945-1 REPAIR KIT COILS
 ASCO 206409011D COIL
 ASCO 208-056-120 SOLENOIND VALVE 120AC EXPLOSION PROOF
 ASCO 208544 KIT
 ASCO 21100140 VALVE
 ASCO 212392 KIT
 ASCO 214A293-480 UNDER VOLTAGE CONTROL 480VAC 10%W/DROP OUT RELAY
 ASCO 214B281 SEQUENCE CTRL
 ASCO 216B89 SWITCH ASSY
 ASCO 216C89 PART
 ASCO 218-941 REPAIR KIT SOLENOIND
 ASCO 218-956 VALVE REPAIR KIT
 ASCO 220-931 REPAIR KIT
 ASCO 222184015D COIL
 ASCO 222641 VALVE KIT
 ASCO 224195-001-D COIL 120/60HZ 110/50HZ
 ASCO 226188 REPAIR KIT
 ASCO 238210-032D COIL 120V
 ASCO 238210-088-D-480 COIL 480/60 440/50 HZ
 ASCO 238214-032-D SOLENOID COIL 120V 60HZ
 ASCO 238514335D COIL
 ASCO 238610005D COIL
 ASCO 238610032 COIL
 ASCO 238610-032-D REPLACEMENT COIL
 ASCO 238610132-D COIL
 ASCO 23861032 SOLENOID
 ASCO 238612032 COIL
 ASCO 238614-032-D 120V COIL
 ASCO 238614-132-D COIL REPLACEMENT
 ASCO 23861432D SOLENOID
 ASCO 238864 KIT
 ASCO 238-910-004-D VALVE COIL KIT
 ASCO 238910-006-D COIL EXPLOSION PROOF
 ASCO 258851 RETAINING CLIP
 ASCO 262964 REPAIR KIT
 ASCO 2.63E+13 SOLENOID VALVE
 ASCO 263900003 SOLENOID VALVE
 ASCO 263C02D11X03 UNIT
 ASCO 266762 COIL
 ASCO 270110032D COIL
 ASCO 2705TBTD2 DIAPHAGM VALVE F3/T 1 1/4INCH 3/2 166
 ASCO 272873 REPAIR KIT DIN CONNECTOR
 ASCO 27-462-2-D COIL FOR SOLENOID VALVE 240/60 220/50
 ASCO 27-463-3 COIL FOR SOLENOID VALVE 12VDC
 ASCO 274662 COIL
 ASCO 27-477-1-D COIL FOR SOLENOID VALVE 110-125VDC
 ASCO 27-478-3-B COIL
 ASCO 276886 REPAIR KIT
 ASCO 28400025 VALVE
 ASCO 28490041 VALVE
 ASCO 29A-120 COIL 115/60
 ASCO 302018 REBUILD KIT
 ASCO 302037 VALVE REPAIR KIT
 ASCO 302100 REPAIR KIT
 ASCO 302-116 VALVE REPAIR KIT
 ASCO 302118 VALVE REPAIR KIT
 ASCO 302-120 VALVE REPAIR KIT
 ASCO 302-121 VALVE REPAIR KIT
 ASCO 302143 KIT SOLENOID VALVEREBUILD AC FOR 8320G186
 ASCO 302144 REPAIR KIT
 ASCO 302148 KIT
 ASCO 302168 REPAIR KIT FOR 8320SERIES
 ASCO 302183 KIT
 ASCO 302184 REPAIR KIT
 ASCO 302185V KIT
 ASCO 302227 SOLENOID VALVE REPAIR KIT
 ASCO 302234J REBUILD KIT
 ASCO 302270 REBUILD KIT
 ASCO 302-272 REPAIR KIT FOR SOLENOID VALVE
 ASCO 302-273 REPAIR KIT FOR SOLENOID VALVE
 ASCO 302273MO REPAIR KIT
 ASCO 302-275 VALVE REPAIR KIT
 ASCO 302276 VALVE REPAIR KIT
 ASCO 302276VH REPAIR KIT
 ASCO 302-277 KIT SOLENOID VALVE
 ASCO 302279 REBUILD KIT 8210 AC
 ASCO 302283 REBUILD KIT/VALVE/ #R02-1246
 ASCO 302-284 REPAIR KIT
 ASCO 302289V REBUILD KIT
 ASCO 302-290 VALVE REPAIR KIT
 ASCO 302297 REPAIR KIT
 ASCO 302-300 VALVE REPAIR KIT
 ASCO 302305 REPAIR KIT
 ASCO 302313 REPAIR KIT
 ASCO 302314N REPAIR KIT
 ASCO 302315 KIT
 ASCO 302326 REPLACEMENT STEM AND SEAL KIT
 ASCO 302-328 REPAIR KIT FOR SOLENOID VALVE
 ASCO 302328V KIT
 ASCO 302329V KIT
 ASCO 302-334 REBUILD KIT