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Rexroth電磁閥現貨庫存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。
、根據管道參數選擇電磁閥的：通徑規格（即DN）、接口方式
1）按照現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則可根據用戶需要自由選擇。
2、根據流體參數選擇電磁閥的：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：大至有氣態，液態或混合狀態，特別是口徑大于DN25時一定要區分開來；
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、根據壓力參數選擇電磁閥的：原理和結構品種
1）公稱壓力：這個參數與其它通用閥門的含義是一樣的，是根據管道公稱壓力來定；
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：電壓規格應盡量優先選用AC220V、DC24較為方便。
5、根據持續工作時間長短來選擇：常閉、常開、或可持續通電
1）當電磁閥需要長時間開啟，并且持續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、窯火焰監測，則不能選常開的，應選可長期通電型。
6、根據環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、爆炸性環境：必須選用相應防爆等級產品，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，液態或混合狀態分別選用不同品種的電磁閥；
2）介質溫度不同規格產品，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
1）根據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、環境條件
1）環境的高和低溫度應選在允許范圍之內；
2）環境中相對濕度高及有水滴雨淋等場合，應選防水電磁閥；
3）環境中經常有振動，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境中的使用應優先根據安全性要求選用耐發蝕型；
5）環境空間若受限制，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）電壓規格用盡量優先選用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，須采取穩壓措施；
4）應根據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要求平穩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值為常用經濟等級。
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，結構應優選直動式電磁閥，電源聽優選交流。
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標準，為確保質量應選廠家的名牌產品。有些場合動作次數并不多，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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