Rexroth電磁閥現(xiàn)貨庫存R901278763 4WE10D5X/OFEG24N9K4/M
武漢百士自動化設備有限公司專注于液壓、氣動、工控自動化備件銷售，熱誠歡迎新老客戶咨詢購買！
我司主要經(jīng)銷氣動，液壓，工控自動化流體控制設備備品備件
主營品牌：博世力士樂BOSCH-REXROTH、安沃馳AVENTICS、迪普馬DUPLOMATIC、愛爾泰克AIRTEC、本特利Bently、貝加萊B&R、世格ASCO、阿托斯ATOS。
主要涵蓋產(chǎn)品：電磁閥、比例閥、單向閥、溢流閥、壓力繼電器、壓力傳感器、葉片泵、柱塞泵、齒輪泵、蓄能器、氣動閥、氣缸、氣源處理單元、探頭、前置器、延伸電纜、監(jiān)測模塊、校驗儀、伺服驅動器、PLC模塊、I/O模塊、伺服電機、觸摸屏等。
、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、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構類型的；
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。
3、根據(jù)壓力參數(shù)選擇電磁閥的：原理和結構品種
1）公稱壓力：這個參數(shù)與其它通用閥門的含義是一樣的，是根據(jù)管道公稱壓力來定；
2）工作壓力：如果工作壓力低則必須選用直動或分步直動式原理；低工作壓差在0.04Mpa以上時直動式、分步直動式、先導式均可選用。
4、電氣選擇：電壓規(guī)格應盡量優(yōu)先選用AC220V、DC24較為方便。
5、根據(jù)持續(xù)工作時間長短來選擇：常閉、常開、或可持續(xù)通電
1）當電磁閥需要長時間開啟，并且持續(xù)的時間多于關閉的時間應選 用常開型；
2）要是開啟的時間短或開和關的時間不多時，則選常閉型；
3）但是有些用于安全保護的工況，如爐、窯火焰監(jiān)測，則不能選常開的，應選可長期通電型。
6、根據(jù)環(huán)境要求選擇輔助功能：防爆、止回、手動、防水霧、水淋、潛水。
選型原則
安全性：
1、腐蝕性介質：宜選用塑料王電磁閥和全不銹鋼；對于強腐蝕的介 質必須選用隔離膜片式。中性介質，也宜選用銅合金為閥殼材料的電磁閥，否則，閥殼中常有銹屑脫落，尤其是動作不頻繁的場合。氨用閥則不能采用銅材。
2、爆炸性環(huán)境：必須選用相應防爆等級產(chǎn)品，露天安裝或粉塵多場合應選用防水，防塵品種。
3、電磁閥公稱壓力應超過管內高工作壓力。
適用性：
1、介質特性
1）質氣，液態(tài)或混合狀態(tài)分別選用不同品種的電磁閥；
2）介質溫度不同規(guī)格產(chǎn)品，否則線圈會燒掉，密封件老化，嚴重影響壽命命；
3）介質粘度，通常在50cSt以下。若超過此值，通徑大于15mm時，用多功能電磁閥；通徑小于15mm時，用高粘度電磁閥。
4）介質清潔度不高時都應在電磁閥前配裝反沖過濾閥，壓力低時，可選用直動膜片式電磁閥；
5）介質若是定向流通，且不允許倒流，需用雙向流通；
6）介質溫度應選在電磁閥允許范圍之內。
2、管道參數(shù)
1）根據(jù)介質流向要求及管道連接方式選擇閥門通口及型號；
2）根據(jù)流量和閥門Kv值選定公稱通徑，也可選同管道內徑；
3）工作壓差：低工作壓差在0.04Mpa以上是可選用間接先導式；低工作壓差接近或小于零的必須選用直動式或分步直接式。
3、環(huán)境條件
1）環(huán)境的高和低溫度應選在允許范圍之內；
2）環(huán)境中相對濕度高及有水滴雨淋等場合，應選防水電磁閥；
3）環(huán)境中經(jīng)常有振動，顛簸和沖擊等場合應選特殊品種，例如船用電磁閥；
4）在有腐蝕性或爆炸性環(huán)境中的使用應優(yōu)先根據(jù)安全性要求選用耐發(fā)蝕型；
5）環(huán)境空間若受限制，需選用多功能電磁閥，因其省去了旁路及三只手動閥且便于在線維修。
4、電源條件
1）根據(jù)供電電源種類，分別選用交流和直流電磁閥。一般來說交流電源取用方便；
2）電壓規(guī)格用盡量優(yōu)先選用AC220V.DC24V；
3）電源電壓波動通常交流選用+%10%.-15%，直流允許±%10左右，如若超差，須采取穩(wěn)壓措施；
4）應根據(jù)電源容量選擇額定電流和消耗功率。須注意交流起動時VA值較高，在容量不足時應優(yōu)先選用間接導式電磁閥。
5.控制精度
1）普通電磁閥只有開、關兩個位置，在控制精度要求高和參數(shù)要求平穩(wěn)時需選用多位電磁閥；
2）動作時間：指電信號接通或切斷至主閥動作完成時間；
3）泄漏量：樣本上給出的泄漏量數(shù)值為常用經(jīng)濟等級。
可靠性：
1、工作壽命，此項不列入出廠試驗項目，屬于型式試驗項目。為確保質量應選廠家的名牌產(chǎn)品。
分長期工作制，反復短時工作制和短時工作制三種。對于長時間閥門開通只有短時關閉的情況，則宜選用常開電磁閥。
3、工作頻率：動作頻率要求高時，結構應優(yōu)選直動式電磁閥，電源聽優(yōu)選交流。
4、動作可靠性
嚴格地來說此項試驗尚未正式列入中國電磁閥專業(yè)標準，為確保質量應選廠家的名牌產(chǎn)品。有些場合動作次數(shù)并不多，但對可靠性要求卻很高，如消防、緊急保護等 ，切不可掉以輕心。特別重要的，還應采取兩只連用雙保險。
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