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                  三偏心金屬硬密封蝶閥

                  型號:

                  發布日期:03-16

                  產品詳情

                      比較先進的蝶閥是三偏心金屬硬密封蝶閥,閥體和閥座為連體構件,閥座密封表面層堆焊耐溫、耐蝕合金材料。多層軟疊式密封圈固定在閥板上,這種蝶閥與傳統蝶閥相比具有耐高溫,操作輕便,啟閉無磨擦,關閉時隨著傳動機構的力矩增大來補償密封,提高了蝶閥的密封性能及延長使用壽命的優點。

                  技術指標 Technical indicators

                  1.口徑:4″-80″                                            1.size: 4″-80″     

                  2.壓力:150LB-900LB                                 2. Pressure: 150LB-900LB

                  3.閥體材質:                                                 3. Body material   

                  碳素鋼   -50℃-425℃                                  Carbon steel    -50℃-425℃

                  合金鋼   -50℃-610℃                                  Alloy steel     -50℃-610℃

                  不銹鋼   -50℃-700℃                                  Stainless steel -50℃-700℃

                  應用范圍                                                       Range of application:

                  1.石化廠:鹽水,二氧化碳蒸汽、丙烯廠、蒸汽系統、氧氣系統、氫氣,丙烷氣、火焰入口和Maniford隔離、乙烯廠、PSA和分析篩、乙烯裂化裝置、焦化廠。

                  Petrochemical plants:brine,CO2 vapor; propylene plants, steam service, oxygen service, hydrogen gas; propane gas, flare inlet and maniford isolation; ethylene plants; PSA & molecular sieves; ethylene crackers; coking plant

                  2.火力發電:泵隔離、冷凝器冷卻、泵和蒸汽抽取隔離、熱交換器,冷凝器冷卻隔離

                  Fossil power plants: pump isolation; condenser cooling; pump and steam extraction isolation; heat exchanger, condenser cooling isolation

                  3.低溫:所有液態氣體、液化和天然氣系統、油田回收系統、氣化廠和儲存設備、液化天然氣運輸系統

                  Cryogenics: all liquid gases; liquid and natural gas service; oil field recovery system; gasification plants and storage; LNG ship’s service

                  4.紙漿和造紙:蒸汽隔離,鍋爐水、綠&紅和黑液、氧氣管道、石灰和泥漿

                  Pulp and paper: steam isolation, boiler water; green&red and black liquors; oxygen lines; lime and mud

                  5.核電廠:容器隔離、鹽水系統、堆心噴淋系統、泵隔離

                  Nuclear power plants: containment isolation: saltwater service; core spray systems; pump isolation

                  6.石油煉制:儲油庫隔離、供氣閥、脫硫系統和廢氣處理器、火炬氣&氫氣&酸氣隔離、熱裂氣、催化裂化器裝置

                  Petroleum refining: oil storage isolation, steam supply valves, desulphurization systems and tall gas treaters; flare gas hydrogen, sour gas isolation; hot cracking gas; catalytic cracker units;

                  工作原理

                  WT三重偏心蝶閥具有雙向無氣泡緊密關閉性能。這種幾何形狀保證閥籠密封只是在關閉位置時才與閥體閥座接觸,因此不會產生摩擦或磨損,并且產生一種扭矩使得彈性密封具有足夠的“焊接”功能,確保密封接觸的均勻一致性。

                   

                  三偏心幾何形狀

                  偏心1 閥軸位于閥座軸后面,使得密封能夠完全緊密環繞接觸整個閥座。

                  偏心2 閥軸中心線偏離管道和閥門中心線,這就免受閥門開啟和關閉的干擾。

                  偏心3 閥座錐體軸偏離閥軸中心線,這樣可以在關閉和開啟過程中消除摩擦作用,并且實現環繞整個閥座的均勻一致的壓縮密封效果。

                   

                  Principle of operation

                  Welland&Tuxhorn[W&T] triple offset butterfly valve provides a bl-dlrectional bubble tight shut-off. This geometry ensures that the disc seal contacts the body seat only at the final shut-off position without rubbing or galling, providing a torque generated resilient seal with sufficient “wedging:” to ensures a uniform seal contact.

                   

                  The triple offset geometry

                  Offset1 the shaft is offset behind the seat axis to allow complete sealing contact around the entire seat.

                  Offset2 the shaft centerline is offset from the pipe and valve which provides interference free opening and closing of the valve.

                  Offset3 the seat cone axis is offset from the shaft centerline to eliminate friction during closing and opening and to achieve uniform compressive sealing around the entire seat.

                   

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