品牌:MAXON | 規格: | 產地:德國 |
12英寸放電套管/烤箱壁式墊圈產品編號:33978
12英寸放電套管/烤箱壁式墊圈產品編號:33978
各大進口品牌DCS控制備件
AB 1771 1785 1756 1746 1747係列價格超低
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GE IC697、IC693備件
ABB機器人控制備件DSQC開頭,3H開頭的型號及老係統備件
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Vickers威格士859193DG4V30CMUB660DG4V30CMUB660眾所周知,屋頂通風機在生產中具有大的作用,那麼屋頂通風機應該怎樣選用呢?下面讓我們一起來了解吧。屋頂通風機選用控制參數為風機型式、材質、風量、全壓、效率、噪聲和電機功率等。根據被輸送氣體的物理、化學性質,選擇不同用途的通風機。通風機選型時,應考慮管路係統的漏風損失、計算誤差,以及通風機實際風量、風壓的負偏差,一般採用風量為1.5∼1.1,風壓為1.1∼1.15的係數。但也不採用過大,以防止通風機長期處在低效率區運行。注意管網阻力特性與通風機特性的匹配關係。為使通風機能穩定運行,應使通風機在其率點附近工作,通風機的工作點位於性能曲線中全壓峰值點的右側(即大風量側,且一般位於全壓峰值的8%)。對有消聲要求的通風係統,應首先選擇效率高、葉輪圓周速度低的通風機,且使其在率點附近工作。屋頂通風機從原理上看,它有軸流式、離心式和混流式三類。由於其設於屋頂,不佔用任何室內空間是其主要的優點。