51109693-100B

51109693-100B

流量儀表的選型對儀表能否成功使用往往起著很重要的作用，由于被測對象的復雜狀況以及儀表品種繁多、性能指標各異，使得技術人員對儀表的選型感到困難。沒有一種十全十美的流量計，各類儀表都有各自的特點，選型的目的就是在眾多的品種中揚長避短，選擇自己zui合適的儀表。

　　一般選型可以從五個方面進行考慮，這五個方面為儀表性能方面、流體特性方面、安裝條件方面、環境條件方面和經濟因素方面。五個方面的詳細分析如下：

　　1、儀表性能方面：準確度、重復性、線性度、范圍度、流量范圍、信號輸出特性、響應時間、壓力損失等；

　　2、流體特性方面：溫度、壓力、密度、粘度、化學腐蝕、磨蝕性、結垢、混相、相變、電導率、聲速、導熱系數、比熱容，等指數；

　　3、安裝條件方面：管道布置方向，流動方向，檢測件上下游側直管段長度、管道口徑、維修空間、電源、接地、輔助設備（過濾器、消氣器）、安裝、等；

　　4、環境條件方面：環境溫度、濕度、電磁干擾、安全性、防爆、管道振動等；

　　5、經濟因素方面：儀表購置費、安裝費、運行費、校驗費、維修費、儀表使用壽命、備品備件等。

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ABB ROBOTICS PS 60/4-75-P
 
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YASKAWA ELECTRIC 400W 200V 3000R/MIN INS.B AC SERVO MOTOR SGMAH-04AAA2C-Y?2*
 
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