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                                                                                                                                歡迎來到美國YLOK閥門一級代理商官方網站

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                                                                                                                                進口低溫球閥

                                                                                                                                  詳細說明

                                                                                                                                  進口低溫球閥

                                                                                                                                  進口低溫球閥產品概述

                                                                                                                                  美國依洛克YLOK進口低溫球閥主要適用于乙烯、液化天然氣等化工裝置上,輸出的液態低溫介質如乙烯、液氧、液氫等。這類介質不但易燃易爆,而且在升溫時要氣化、氣化是體積膨脹數百倍。而且這些介質滲透力強,易泄露,加工制造比較困難。

                                                                                                                                  進口低溫球閥主要技術參數

                                                                                                                                  型式:法蘭式/焊接式

                                                                                                                                  尺寸:DN15-DN200    1/2”-8”

                                                                                                                                  壓力:PN16-PN160    150LB-1500LB

                                                                                                                                  溫度:-196-350

                                                                                                                                  閥體:WCB碳鋼/不銹鋼304/不銹鋼316

                                                                                                                                  閥座:不銹鋼+PTFE

                                                                                                                                  適用范圍:水、氣體、油品、液體、氨氣等介質

                                                                                                                                  連接方式:美標或其它標準

                                                                                                                                  進口低溫球閥產品特點

                                                                                                                                  1.承壓件的材料能承受介質溫度的變化而引起的膨脹、收縮、密封部位的結構在溫度變化時不會產生永久的變形。用于-100℃以下工況時,閥門零件在精加工前應進行深冷處理,即將零件浸放在液氮箱中進行冷卻,當零件溫度達到-192℃時,開始保溫1-2h,然后取出箱外自然處理到常溫,重溫循環2次。

                                                                                                                                  2、使用溫度低于-100℃時,閥桿材料經過鍍鉻或氮化處理,提高閥桿表面硬度,提高填料密封的可靠性。

                                                                                                                                  3、閥蓋采用長勁結構,其目的保護填料函的功能,使填料函處于離低溫較遠的位置,保證填料的密封效果,同時還可以纏繞保冷材料,防止冷能損失。長頸的頸長可根據使用溫度和保冷材料的厚度來選擇不同的長度。當填料密封效果降低時,可以從填料函中間加入潤滑脂形成油封層,降低填料函的壓差,提高密封性能。

                                                                                                                                  4、低溫球閥具有防止異常升壓結構,由于低溫閥門介質氣化后,其體積急劇膨脹,壓力會異常升高,當閥門中腔壓力升高時,閥門中腔和進口連通,或在閥門進口端安置泄壓閥,保證閥門安全使用。

                                                                                                                                  5、低溫球閥用的墊片具有在常溫下、低溫狀態及溫度變化下能可靠密封性和復原性

                                                                                                                                  進口低溫球閥工作原理

                                                                                                                                  低溫球閥工作原理:

                                                                                                                                  低溫球閥適用于的各種管路上,用于截斷或接通管路中的介質,選用不同材質,可分別適用于不同的溫度和介質,最低工作溫度為-196℃。低溫球閥的驅動方式為手動、蝸輪蝸桿傳動、氣動或電動。低溫球閥一般采用法蘭連接,也可采用焊接連接。

                                                                                                                                  低溫球閥產品特點:

                                                                                                                                  1、采用了在閥芯上開設減壓孔的構造。

                                                                                                                                  2、墊片是使用了含有具有穩定密封性的陶瓷填充材料。

                                                                                                                                  3、閥體輕、尺寸小。為了減少閥體的熱損失,特別是為了保證閥門超低溫下的使用,特意設計成重量輕、尺寸小的閥體。

                                                                                                                                  4、長軸閥有低溫流體流經的閥,采用長閥桿形式,可以避開外部熱的作用使壓蓋保持常溫,以防止蓋密封件的性能降低。此長度是通過計算、試驗而得出的最佳長度。

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