PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08
PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08
PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08

主要分類  

1、電磁閥從原理上分為三大類：  rexroth泵PV7-1X/10-20RE01MC0-08

直動式電磁閥  

原理：通電時，電磁線圈產(chǎn)生電磁力把關(guān)閉件從閥座上提起，閥門打開；斷電時，電磁力消失，彈簧把關(guān)閉件壓在閥座上，閥門關(guān)閉。  

特點：在真空、負壓、零壓時能正常工作，但通徑一般不超過25mm。  

分步直動式電磁閥  

原理：它是一種直動和先導(dǎo)式相結(jié)合的原理，當入口與出口沒有壓差時，通電后，電磁力直接把先導(dǎo)小閥和主閥關(guān)閉件依次向上提起，閥門打開。當入口與出口達到啟動壓差時，通電后，電磁力先導(dǎo)小閥，主閥下腔壓力上升，上腔壓力下降，從而利用壓差把主閥向上推開；斷電時，先導(dǎo)閥利用彈簧力或介質(zhì)壓力推動關(guān)閉件，向下移動，使閥門關(guān)閉。  

特點：在零壓差或真空、高壓時亦能可*動作，但功率較大，要求必須水平安裝。  

先導(dǎo)式電磁閥  

原理：通電時，電磁力把先導(dǎo)孔打開，上腔室壓力迅速下降，在關(guān)閉件周圍形成上低下高的壓差，流體壓力推動關(guān)閉件向上移動，閥門打開；斷電時，彈簧力把先導(dǎo)孔關(guān)閉，入口壓力通過旁通孔迅速腔室在關(guān)閥件周圍形成下低上高的壓差，流體壓力推動關(guān)閉件向下移動，關(guān)閉閥門。  

特點：流體壓力范圍上限較高，可任意安裝（需定制）但必須滿足流體壓差條件。  

2、電磁閥從閥結(jié)構(gòu)和材料上的不同與原理上的區(qū)別，分為六個分支小類：直動膜片結(jié)構(gòu)、分步直動膜片結(jié)構(gòu)、先導(dǎo)膜片結(jié)構(gòu)、直動活塞結(jié)構(gòu)、分步直動活塞結(jié)構(gòu)、先導(dǎo)活塞結(jié)構(gòu)。  

3、電磁閥按照功能分類：水用電磁閥、蒸汽電磁閥、制冷電磁閥、低溫電磁閥、燃氣電磁閥、消防電磁閥、氨用電磁閥、氣體電磁閥、液體電磁閥、微型電磁閥、脈沖電磁閥、液壓電磁閥常開電磁閥、油用電磁閥、直流電磁閥、高壓電磁閥、防爆電磁閥等。  

 SAGINOMIYA鷺宮電磁閥

選型依據(jù)  

電磁閥選型首先應(yīng)該依次遵循安全性，可靠性，適用性，經(jīng)濟性四大原則，其次是根據(jù)六個方面的現(xiàn)場工況（即管道參數(shù)、流體參數(shù)、壓力參數(shù)、電氣參數(shù)、動作方式、特殊要求進行選擇）。  

 SAGINOMIYA鷺宮電磁閥

選型依據(jù)：  

1、根據(jù)管道參數(shù)選擇電磁閥的：通徑規(guī)格（即DN）、接口方式  

1）按照現(xiàn)場管道內(nèi)徑尺寸或流量要求來確定通徑（DN）尺寸；  

2）接口方式，一般>DN50要選擇法蘭接口，≤DN50則可根據(jù)用戶需要自由選擇。  

2、根據(jù)流體參數(shù)選擇電磁閥的：材質(zhì)、溫度組  

1）腐蝕性流體：宜選用耐腐蝕電磁閥和全不銹鋼；食用超凈流體：宜選用食品級不銹鋼材質(zhì)電磁閥；  

2）高溫流體：要選擇采用耐高溫的電工材料和密封材料制造的電磁閥，而且要選擇活塞式結(jié)構(gòu)類型的；  

3）流體狀態(tài)：大至有氣態(tài)，液態(tài)或混合狀態(tài)，特別是口徑大于DN25時一定要區(qū)分開來；  

4）流體粘度：通常在50cSt以下可任意選擇，若超過此值，則要選用高粘度電磁閥。

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