点击图片查看原图二次偏心球面密封阀座是在球体上取一个截面来设计，减少了阀座与阀板的磨损，保证了整个压力范围内的双向密封功能。
以球面密封阀座为起始点，使阀轴与阀座偏心1与阀轴与通道偏心2在阀板启闭时产生一个类似凸轮的作用，在开启时阀座与阀板基本不磨擦，减小操作力矩。关闭时具有相应的密封补偿功能，从而提高了阀门的使用寿命。根据不同工况，可选用相应的材质和密封材料达到要求。
金属与软夹层结构，即具有金属耐磨损的性能，同时又具有软甲夹层的密封性能。适用在蒸汽，水、油品、供热、水处理等介质，在高温或低温的工况下都有非常优越的密封性能及防火灾功能。碳钢WCB材质耐温可达425℃。
聚四氟乙烯阀座设计有T型加V型结构，能有效的消除阀座在使用过程中受介质温度热涨冷缩的影响，具有优越的耐腐蚀性能。使用在石油、化工、药品、食品等腐蚀性介质，增强聚四氟乙烯*高温度可达230℃。
橡胶密封圈采用镶入式结构，有效防止胶圈脱落的问题。阀体阀板整体采取环氧树脂粉末静电喷涂工艺，具有附着力强，润滑度高，耐腐性好，完全解决阀门对介质的二次污染，是城市供排水的理想产品。使用温度≥100℃。
Secondary eccentric spherical sealing seat is taking a section to design on the ball, which reduces the wear between the valve seat and valve plate, and ensures a two-way sealing function throughout the pressure range.
Taking the spherical seal butterfly valve as a starting point, so that the offset 1 between the valve shaft and the valve seat and offset 2 between the channels eccentric produces a similar cam in valve plate opening and closing time, when opening there are no friction between the valve seat and the valve plate, and that reduced the operating torque. When Closing there is a corresponding sealing compensation function, thereby improving the service life of the valve. According to the different working condition, you can choose the corresponding materials and sealing materials to meet the requirements.
Metal and soft sandwich structure, which has the sealing performances of both metal wear resistance, and a soft interlayer, They have very superior sealing performance and fire prevention function in the high or low temperature conditions and are suitable for steam, water, oil, heating, water treatment and other media. Carbon steel WCB material can reach 425 ℃ condition.
The design of PTFE seat have T type and V type structure, which can effectively eliminate the effect that heat expansion and cold contraction by the medium temperature of the seat in the use process, with excellent corrosion resistance. It is used in petroleum, chemical, pharmaceutical, food and other corrosive medium. PTFE highest temperature can reach 230 ℃.
Rubber sealing valve using insert structure, which effectively prevent the rubber ring from shedding . Both the valve body and valve plate take electrostatic epoxy powder coating process, which has strong adhesion, high degree of lubrication, good corrosion resistance, completely solved the secondary pollution of valve to the media, is the ideal product of urban water supply and drainage. The use of temperature ≥ 100 ℃.
该产品系本公司自主研发的环保型二次偏心球面密封蝶阀；无销连接，松开调整圈即可拆下压圈、密封圈，相互更换方便；密封圈设计在阀体上，结构简单，阀板密封面为球面，启闭时无摩擦，耐磨损。具有操作力矩小，过流面积大，采用不同材质的阀体?阀板?密封圈，可满足不同工况的需求；所有零部件都能进行无毒环氧树脂粉末静电喷涂，能完全解决阀门对介质的二次污染，是供排水行业的理想选择。
This product is environmental secondary eccentric spherical sealing butterfly valve which is independently researched and developed by the company; No pin connection, When loosing the adjusting ring you can remove the retainer flange and sealing ring easily, and it's convenient to change each other. The structure that the sealing ring is designed on the valve body is simple; The disc sealing surface is spherical, opening and closing without friction and wear resistance. Small operation torque, big flow area, using different material of the body, plate, sealing ring, which can meet the needs of different working conditions; All parts can be of non-toxic powder electrostatic spraying epoxy resin, which can completely solve the secondary pollution of valve to the media, and is the ideal choice for water supply and drainage industry.
法兰式二次偏心球面橡胶密封球墨铸铁蝶阀