原裝進口LORENZ傳感器DR-50N-S12廠家報價

不銹鋼齒輪泵的泵體與兩側端蓋為直接接觸的硬密封，若接觸面的平面度達不到規定要求，則泵在工作時容易吸入空氣；同樣，泵的端蓋與壓蓋之間也為直接接觸，空氣也容易侵入；若壓蓋為塑料制品，由于其損壞或因溫度不銹鋼齒輪泵的泵體與兩側端蓋為直接接觸的硬密封，若接觸面的平面度達不到規定要求，則泵在工作時容易吸入空氣；同樣，泵的端蓋與壓蓋之間也為直接接觸，空氣也容易侵入；若壓蓋為塑料制品，由于其損壞或因溫度變化而變形，也會使密封不嚴而進入空氣。 
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原裝進口LORENZ傳感器DR-50N-S12廠家報價

不銹鋼厚壁管的石油精煉裝置中不銹鋼使用大致存在以下問題應力腐蝕破裂，穿晶破裂(以氯化物為主)，晶間應力腐蝕破裂(以硫化物為主)。點蝕，晶間腐蝕，環烷酸嘴蝕，滲碳脆化。根據石油精煉裝置不同腐蝕情況選用不銹鋼厚壁管的材料也不同。如高溫硫化物系統考慮Al和Cr的抗硫腐蝕及高溫強度，使用Cr5-Mo以上的材料；高溫H2S-H2系統使用13Cr-Al，18-8Ni鋼；環烷酸系統，低流速情況下選用Cr17Ni14Mo2即可，高流速情況需進一步研究；低溫CO2腐蝕系統，一般在2℃左右可使用Cr18Ni1；制H2裝置中改質爐反應管、高溫鋼管以及各種加熱爐鈴的吊架、支架可選用25Cr-2Ni，Incone合金8等。 

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原裝進口LORENZ傳感器DR-50N-S12廠家報價

內側少焊后，用戶在外觀上不易看出來，但設備的可靠性下降。未焊的內側將形成夾縫，釜內物料容易滲入，又難以清洗，滲入物的成份通常不定，既可能長期滯留夾縫深層腐蝕設備，脫落后又可能污染產品。反應釜內壁和釜內部件不拋光，釜內壁粗糙，易生銹、結垢，使用初期或置換產品時清洗困難�；煜�全容積和公稱容積概念，通常設備的全容積是反應釜筒體和上下封頭包含的所有空間，而公稱容積僅僅是釜體夾套對應的體積，也就是可投料的體積。#為ER（夾帶排除）區，采用解析的產品將樹脂間隙內的水頂出，以保證解析時產品的濃度不被稀釋。~19為解析區域產品在19#位得到收集。~13#為解析水洗區，其流出液還含有大量未被利用的解析溶劑和洗滌下來的產品，為了提供溶劑的利用效率及提高產品收率，洗滌水同15#流出液混合后進入二級解析區域。~12#為再生區域，采用的再生劑根據樹脂的型號來決定，本工藝中主要采用酸堿再生。由于每個柱都能得到充分的利用，可保證每個進入下一區域的柱都能達到優化狀態，可使得產品與雜質完全分離，產品的質量得到提高；解析時產品得到完全的解析，并通過ER（夾帶排除）區保證解析產品的濃度，有利于后工序的濃縮。 

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原裝進口LORENZ傳感器DR-50N-S12廠家報價

眾所周知，屋頂通風機在生產中具有很大的作用，那么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，應考慮管路系統的漏風損失、計算誤差，以及通風機實際風量、風壓的負偏差，一般采用風量為1.5～1.1，風壓為1.1～1.15的安全系數。但也不采用過大，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系。為使通風機能穩定運行，應使通風機在其率點附近工作,通風機的工作點位于性能曲線中全壓峰值點的右側（即大風量側，且一般位于全壓峰值的8%）。對有消聲要求的通風系統，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。由于其設于屋頂，不占用任何室內空間是其主要的優點。