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[{"ID":"817","Title":"G1/2是多大的口徑？","Detail":"G1/2是多大的口徑？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網絡有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網問答小助理","IndustryType":"3991,3992","Linkman":"李","Telphone":"0571-87756393/9（）","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/11/11 11:43:15","HitNumber":"25639","Answer":"接口管徑G1/4的意思是用與之對應的接頭連接，1/4是非螺紋密封的管螺紋，對應的螺紋大徑是13.157mm，小徑為11.445mm。其實也不用知道G1/4是多大，拿G1/4的接頭連接上，接頭上再接皮管就行了。皮管的口徑由接頭來確定。 電磁閥的接管口徑 3/8是是我們常說的四分管，對應公制螺紋的公稱口徑是20毫米，真實管的外徑是21.3毫米。 行內人”通常用“分”來稱呼螺紋尺寸，一英寸等于8分，1/4英寸就是2分，以此類推。電磁閥中的PT1/8、PT1/4指的是電磁閥上的接口螺紋的規格。","IndustryTypeName":"流量儀表,泵閥"},{"ID":"211","Title":"儀表的[MC]是什么意思？","Detail":"我看到有的壓力表，電壓表，電流表，溫度表都有[MC]，它究竟指什么啊？","FromUserID":"24176","UserName":"vivi112204","FromCompanyID":"15256","CompanyName":"杭州明通科技","FromName":"wang","ToID":"21","ExpertName":"儀表網問答小助理","IndustryType":"3990,3993,3985","Linkman":"小林","Telphone":"0571-87756399","Email":"","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2010/10/29 17:43:25","HitNumber":"12848","Answer":"采納網友華升儀器的說法，MC在許多儀器上加個方框意思是CMC，是China Metrology Certification的縮寫，表示該產品已獲得國家計量器具許可證。","IndustryTypeName":"分析檢測,測量/計量,溫度儀表"},{"ID":"1998","Title":"風開閥和風關閥的作用和區別？","Detail":"風開閥和風關閥的作用和區別？請高手詳細的解釋一下","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網絡有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網問答小助理","IndustryType":"3992","Linkman":"孤獨劍5g","Telphone":"0571-87756393/9（）","Email":"471444022@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/11/15 11:19:36","HitNumber":"10841","Answer":"就是氣開閥（給氣開）和氣關閥（給氣關），一般是用4-20毫安信號控制閥的開關，氣開閥是4毫安對應的關，20毫安對應的閥門開度最大，氣關閥反之。調節閥有故障開（FO)、故障關（FC），有正作用、反作用。舉個例子：閥門裝在儲罐的進口管道，我們用閥門控制儲罐液位，當閥門開度增大，液位升高，正作用，反之，閥門裝在儲罐的出口管道，閥門開度增大，液位降低，反作用。","IndustryTypeName":"泵閥"},{"ID":"862","Title":" 電動閥畫在布置圖上是什么符號？","Detail":"電動閥畫在布置圖上是什么符號？？？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網絡有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網問答小助理","IndustryType":"3992","Linkman":"許小姐","Telphone":"0571-87756393/9（）","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/12/14 18:22:52","HitNumber":"9565","Answer":"國產閥門型號的編制表示方法：
1 2 3 4 5—6 7
1— 閥門類型代號：閘閥—Z、截止閥—J
2— 閥門傳動方式代號：電動—9、氣動—6、液動—7
3— 閥門連接形式代號：內螺紋—1、外螺紋—2、法蘭—4
4— 閥門結構形式代號：
5— 閥座密封面或襯里材料代號：
6— 公稱壓力數值：
7— 閥體材料代號：
（引自《管道識圖》胡憶溈等編，化學工業出版社）
不同的書籍，圖形符號有些差異。","IndustryTypeName":"泵閥"},{"ID":"863","Title":" 液位計顯示不正常求解","Detail":"我廠一裝置區有冷凝液閃蒸槽一臺，操作壓力0.4MPa，介質時蒸汽冷凝液，裝有雙法蘭差壓液位計（橫河EJA118W）及磁翻板液位計各一臺。兩臺液位計都是測的1.2M高度。現在雙法蘭液位計（已遷移過）顯示：在80%-85%之間波動。但是打開閥門排液時，只是蒸汽，而液位計還是指示：在80%-85%之間波動。磁翻板液位計要么不顯示，要么就顯示滿量程。滿量程式關閉根部閥，打開液位計倒淋只有一點水，剩下全是蒸汽（根部閥內漏）。問題：1.雙法蘭液位計為什么只在在80%-85%之間波動。2.磁翻板里沒有過多水，","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網絡有限公司","FromName":"ybzhan","ToID":"91","ExpertName":"何守柱","IndustryType":"3994","Linkman":"林先生","Telphone":"0571-87756393/9（）","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/12/14 18:23:48","HitNumber":"8850","Answer":"1.先查看電源是不是接對,如發現接法不正確應按照操作手冊進行修正

2.用三電壓表量測 24V與O/P間之電壓,電壓應在13V~36V之間,若電壓不正常應查看線路或有關設備是不是反常

3.第2項應先承認正常后,再于4~20MA回路串一只毫安電表,查看電流是不是正常,若電流值不正常應替換新品或洽客服人員

4.用電壓表查看IN與COM間之電壓,正常應為2.5V左右,若電壓過低應再移除EXC導線看看,若是電壓康復正常則表明磁黃模塊不正常,若電依然偏低則表明信號轉換器損壞。","IndustryTypeName":"液/物位儀表"},{"ID":"1271","Title":"購買望遠鏡判斷質量好壞的幾點方法","Detail":"我們在買望遠鏡是面對店面或網上鋪天蓋地的宣傳介紹看得我們眼花繚亂，都是品牌都是感覺不錯。但就在確定要買哪個型號時確猶豫不決。我這里有幾點心得介紹給大家：1、買是首先選擇是單筒還是雙筒，一般來家望遠鏡最廣泛的使用都是雙筒。2、看望遠鏡是手動調焦還是自動聚焦，最先進的望遠鏡目前流行自動聚焦，自動聚焦的好處是觀測運動的目標可以及時觀測準時準確捕捉清晰的目標。而手動聚焦則浪費時間精力錯過捕捉目標的時間機會。現實生活中目標有靜止的有移動的故最好能買自動聚集的望遠鏡。3、目前質量不錯的望遠鏡一般是世界五大品","FromUserID":"34111","UserName":"ok1718","FromCompanyID":"26417","CompanyName":"武漢歐卡科技有限公司","FromName":"劉艷","ToID":"0","ExpertName":"","IndustryType":"3965","Linkman":"喬小姐","Telphone":"027-88311367-605","Email":"1109018416@qq.com","Sort":"0","IsShow":"1","Flag":"0","CanPost":"0","CreateTime":"2012/4/26 13:17:23","HitNumber":"8180","Answer":"","IndustryTypeName":"專用儀表"},{"ID":"721","Title":"變送器阻尼時間是什么意思？","Detail":"各位前輩：有對變送器阻尼時間了解的嗎？它是如何確定，從工作原理層面看，這個時間是定義的那一部分","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網絡有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網問答小助理","IndustryType":"3993,3996","Linkman":"豐碩","Telphone":"0571-87756393/9（）","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/9/21 14:00:32","HitNumber":"8057","Answer":"變送器的阻尼時間，大部分廠家在產品在出廠時一般設定為1 秒，對于常規檢測是較為合適的。對于較大波動的測量場合，可以將阻尼時間加大一點，但不要為了追求測量值穩定而任意加大阻尼時間，這樣可能會妨礙及時測量一些突發的異常值。在ESD應用中，可能需要將阻尼時間調整得短一些，以利用及時響應異常變化。
阻尼時間均可以通過智能協議手操器來調節，可在訂貨時對廠家提出相應的要求。","IndustryTypeName":"溫度儀表,壓力儀表"},{"ID":"1283","Title":"電磁閥雙電控和單電控區別在哪里？","Detail":"電磁閥雙電控和單電控區別在哪里？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網絡有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網問答小助理","IndustryType":"3992","Linkman":"宋先生","Telphone":"0571-87756393/9（）","Email":"mtxwbyb@163.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/4/28 11:08:53","HitNumber":"8002","Answer":"雙電控：即有兩個電磁線圈，一般用在兩位五通電磁閥，兩位五通雙電控電磁閥動作原理：給正動作線圈通電，則正動作氣路接通(正動作出氣孔有氣)，即使給正動作線圈斷電后正動作氣路仍然是接通的，將會一直維持到給反動作線圈通電為止。 給反動作線圈通電，則反動作氣路接通(反動作出氣孔有氣)，即使給反動作線圈斷電后反動作氣路仍然是接通的，將會一直維持到給正動作線圈通電為止。這相當于“自鎖”。 基于兩位五通雙電控電磁閥的這種特性，在設計機電控制回路或編制PLC程序的時候，可以讓電磁閥線圈動作1~2秒就可以了，這樣可以保護電磁閥線圈不容易損壞。
單電控：即只有一個電磁線圈，一般用在2位3通電磁閥，線圈電壓等級一般采用DC24V、AC220V等。 兩位三通電磁閥分為常閉型和常開型兩種，常閉型指線圈沒通電時氣路是斷的，常開型指線圈沒通電時氣路是通的。 常閉型兩位三通電磁閥動作原理：給線圈通電，氣路接通，線圈一旦斷電，氣路就會斷開，這相當于“點動”。 常開型兩位三通單電控電磁閥動作原理：給線圈通電，氣路斷開，線圈一旦斷電，氣路就會接通，這也是“點動”。","IndustryTypeName":"泵閥"},{"ID":"3935","Title":"單脈沖水表、雙脈沖水表和三脈沖水表的區別是什么？","Detail":"單脈沖水表、雙脈沖水表和三脈沖水表的區別是什么？","FromUserID":"89718","UserName":"yyznkj","FromCompanyID":"70610","CompanyName":"廣州市永源智能科技有限公司","FromName":"許工","ToID":"91","ExpertName":"何守柱","IndustryType":"3991","Linkman":"許工","Telphone":"86-020-85272191","Email":"yyznkj@126.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2015/8/27 15:17:03","HitNumber":"7814","Answer":"單脈沖表為1根信號線，1根公共線，只能測正累計。雙脈沖表為2根信號線，2根公共線，只能測正累計。三脈沖表為3根信號線，1根公共線，既能測正累計，又能測負累計。","IndustryTypeName":"流量儀表"},{"ID":"1169","Title":"請問流量系數Cv值的單位是什么？","Detail":"請問流量系數Cv值的單位是什么？Cv是指當流體的壓降為1Psi時,以GPM表示的流量值,哪么GPM的具體單位又是什么?是不是每分鐘的美加侖流量,其單位怎么換算?請專家教教我,萬分感謝!","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網絡有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網問答小助理","IndustryType":"3991","Linkman":"張先生","Telphone":"0571-87756393/9（）","Email":"mtxwbyb@163.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/3/30 8:57:09","HitNumber":"7710","Answer":"就是 美制加侖/分鐘 (USgal/min)
加侖是體積單位=3.78541 立方米","IndustryTypeName":"流量儀表"},{"ID":"961","Title":" M20是什么螺紋，直徑有多少mm？","Detail":"是不是外徑和3/4npt差不多大呢？求解釋。","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網絡有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網問答小助理","IndustryType":"6300","Linkman":"徐先生","Telphone":"0571-87756393/9()","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/2/6 10:21:42","HitNumber":"7269","Answer":"M20是公制螺紋，屬圓柱形螺紋，螺紋本身不具備密封功能，需用墊片進行密封。公制螺紋表示方法為：螺紋大徑×螺距(兩牙之間的距離)，所以M20的直徑就是20mm啊，一般我們用在壓力表接口上，螺紋規格是：M20×1.5.\" J! |7 R0 n1 s# h: S
NPT為美制60度錐管螺紋，屬用螺紋密封的螺紋類型，跟公制螺紋表示方法不同，3/4NPT每寸牙數為14牙，大徑為26.569mm。","IndustryTypeName":"儀表下游"},{"ID":"3913","Title":"預付費水表遠傳水表原理","Detail":"智能預付費水表遠傳水表使用原理？","FromUserID":"82170","UserName":"nbyjsb","FromCompanyID":"63598","CompanyName":"寧波優靜水表有限公司","FromName":"趙慶昌","ToID":"91","ExpertName":"何守柱","IndustryType":"3991,6832,3992,3989,3982,6371","Linkman":"趙慶昌","Telphone":"86-0574-27808011","Email":"971787223@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2015/5/20 14:52:11","HitNumber":"7198","Answer":"遠傳水表是在總線制水表的基礎上加裝了無線傳輸模塊，通過信號把水表數據傳輸到遠傳抄表系統。一般無線遠傳水表可以實現遠程抄表、遠程開閥、關閥等。","IndustryTypeName":"儀表上游,電工儀表,流量儀表,泵閥,系統集成及工控,數顯儀表"}]