点击图片查看原图三偏心斜锥密封是在圆锥体上取一个截面来设计，由阀杆轴线与蝶板密封面间偏置一个尺寸偏心1，并与阀体通道轴线偏置一个尺寸偏心2，阀座回转轴线与阀体通道轴线形成一个偏心角偏心3，故形成三偏心。蝶阀从0°～90°开启时，蝶板密封面会在开启的瞬间立即脱离阀座密封面，在其90°～0°关闭时，只有在关闭的瞬间，其蝶板圆锥形密封面才会接触并压紧阀座圆锥形密封。所以阀座与蝶板上的密封面之间无任何摩擦，提高了阀门的使用寿命。
板密封结构是将多层次密封圈用压板经螺栓固定在阀板上，优点是拆卸方便，大口径阀门在管道内无介质允许人员进入时可进行在线维修，维护成本低。
体密封结构是将多层次密封圈用压圈经螺栓固定在阀体上，优点是阀板结构简单而又有刚性，流量大、流阻小，耐质介冲刷，使用寿命长，适用在高温管线。
双阀座是将阀体、阀板的密封座设计成活动式可拆卸结构，可将阀体上的阀座通过弹簧的簧力来补偿密封，具有良好双向密封功能。
Triple eccentric oblique cone seal is taking a section to design on the cones, between the axis of the stem and disc sealing surface offset a size 1, and between the body channels offset a size 2, and between seat rotary axis and the body channel form a eccentric Angle called offset 3, so that 's the formation of triple eccentric. When the butterfly valve are opened from 0 ° to 90 °, the seal face of the butterfly plate will immediately break away from the valve seat sealing surface , in the 90 ° ~ 0 ° is closed, only at the closing moment, the butterfly plate cone sealing surface contact and compact with the conical seating. So there are no friction between the seat and the sealing surface of butterfly plate, which improves the service life of the valve.
Plate seal structure is fixing the multi-layer sealing ring on the valve plate by bolt through the retainer flange, of which the advantage is Easy and quick disassembly, The technician is allowed to enter the pipe to carry out on-line maintenance when there are no media accessed the large diameter valves, which reduces the maintenance cost.
Body pressure seal structure is fixing the multi-layer sealing ring on the valve body by bolt, of which the advantage is that the plate of valve is simple and has a rigid structure, large flow, small flow resistance, mass medium erosion , long service life, applicable in the high temperature line.
Double seats is design seal seat of the body and the valve plate to break down movable structure, which can compensate for sealing through the spring force of the spring by the seat on the body , with good bilateral direction sealing function .
该系列蝶阀是本公司自主研发的新一代专利产品，无销连接它是通过阀杆铣扁直接与蝶板相匹配连接，利用沉头螺栓固定，具有拆装更方便，连接更牢固安全。采用三偏心密封结构，无机械磨损，可达到零泄漏，有优越的双向密封功能，是用于石油、化工、冶金、电力、建材、食品、医药、给排水、气体输送等不同介质的管路上作调节流量、截断或接通流体的*佳装置。
This series of butterfly valve is a new generation of patented products which is independent researched and developed by our company, no pin connection is through a valve rod milling flat straight connected with the butterfly plate matched, with countersunk head bolt is fixed, is more convenient in assembly, firmer connection security. Use triple eccentric sealing structure, no mechanical wear, can achieve zero leakage, with bidirectional sealing function superior, is used as the best device in oil, chemical industry, metallurgy, electric power, building materials, food, medicine, water supply and drainage, gas delivery of different media, such as adjust, cut off or connected to the fluid flow.
法兰三偏心硬密封蝶阀