The DC5811 series high-performance butterfly valve has a unique structural design of the valve plate and valve seat, which has excellent shut-off performance and durability, and is a widely used regulating valve.

The DC5812 series triple eccentric butterfly valve has a two-way non-bubble tight closing performance. This geometry ensures that the valve plate seal is in contact with the valve body and valve seat only in the closed position, so there is no friction or wear, and a torque is generated so that the elastic seal has a sufficient contact area, similar to the cone surface of a globe Sealing to ensure uniform and consistent sealing contact.

双偏心结构图

规格

产品说明 product description 三偏心蝶阀工作原理

工作原理 principle of operation

DC5812三偏心蝶阀具有双向无气泡紧密关闭性能。这种几何形状保证阀板只是在关闭位置时才与阀体阀座接触，不会产生摩擦或磨损，并且产生一种扭矩使得弹性密封具有足够的接触面积，类似于截止阀密封的一个锥面密封，确保密封接触的均匀一致性。

DC5812 triple eccentric butterfly valve has two-way tight closing performance without air bubbles. This geometry ensures that the valve plate is in contact with the valve body and valve seat only in the closed position without friction or wear, and generates a torque that allows the elastic seal to have a sufficient contact area, similar to a tapered surface of a globe valve seal Sealing to ensure uniform and consistent sealing contact.

三偏心几何形状 the triple offset geometry

偏心1 阀轴位于阀座轴后面，使得密封能够完全紧密环绕接触整个阀座。

Offset1 The valve shaft is located behind the valve seat shaft, allowing the seal to fully and completely contact the entire valve seat.

偏心2 阀轴中心线偏离管道和阀门中心线，这就避免阀门开启和关闭的干扰。

Offset2 The centerline of the valve shaft is offset from the centerline of the pipeline and valve, which avoids the interference of valve opening and closing.

偏心3 阀座锥体轴偏离阀轴中心线，这样可以在开启和关闭过程中消除摩擦作用，并且实现环绕整个阀座的均匀一致的压缩密封效果。

Offset3 The valve seat cone axis is offset from the valve shaft centerline, which can eliminate friction during opening and closing, and achieve a uniform compression and sealing effect around the entire valve seat.

三偏心结构

产品说明product description 三偏心蝶阀结构说明 valve construction

采用三偏心结构，适用于高温高压等复杂工况并要求严密切断的场合，阀门开闭过程无摩擦，开启力矩小，扭力密封，介质作用力越大密封性能越好。

Adopting triple eccentric structure, it is suitable for high temperature and high pressure and other complicated working conditions and requires strict close. The valve opens and closes without friction, the opening torque is small, the torque is sealed, and the greater the medium force, the better the sealing performance.

阀座和阀体采用一体式结构，阀座密封面堆焊高强度合金材料，保证密封面可靠性，产品使用寿命长，基本做到零维护。

The valve seat and valve body adopt an integrated structure, and the sealing surface of the valve seat is welded with high-strength alloy material to ensure the reliability of the sealing surface, the product has a long service life, and basically has zero maintenance.

多种密封结构选择：有多层次符合结构、多层次全金属结构及整体金属结构密封圈。可根据不同的工况进行选择。多层次密封结构使密封圈整体具有一定的柔性，能使密封圈与阀座贴合更好，从而保证泄漏等级达到ANSI B16.104-2000 Ⅵ。

A variety of sealing structure options: there are multi-level conforming structures, multi-level all-metal structures and overall metal structure sealing rings. Can choose according to different working conditions. The multi-layered seal structure makes the seal ring as a whole have a certain flexibility, which can make the seal ring and the valve seat fit better, thereby ensuring that the leakage level reaches ANSI B16.104-2000 Ⅵ

台阶式结构设计能有效防止阀杆飞出，保证阀门安全性，整体式的阀杆，并采用高强度的不锈钢材料，阀门承受的允许压差大。

The stepped structure design can effectively prevent the valve stem from flying out, which greatly guarantees the safety of the valve. The integral valve stem is made of high-strength stainless steel.

阀杆与阀板传动方式采用圆柱销偏置结构，防止阀杆由于钻孔导致强度降低的状况，从而间接提高了圆柱销的剪切强度，并提高了阀门安全可靠性。

The transmission method of the valve stem and the valve plate adopts a cylindrical pin offset structure, which prevents the decrease in strength of the valve stem due to drilling, thereby indirectly increasing the shear strength of the cylindrical pin and improving the safety and reliability of the valve.

阀杆保护止推环结构，防止了阀杆与阀体间的死角位置被颗粒介质或易结焦介质结垢、结块，从而将阀杆抱死。反向流向时，可有效防止阀杆因介质作用力使阀杆产生径向位移，导致反向泄漏量增大。

The valve stem protects the thrust ring structure, preventing the dead angle position between the valve stem and the valve body from being fouled or agglomerated by particulate or easily coking media, thereby holding the valve stem to death. In the reverse flow direction, it can effectively prevent the valve stem from causing radial displacement due to the force of the medium, resulting in an increase in reverse leakage.

轴封结构采用耐高温的非金属材料能有效防止介质中所含杂质颗粒进入轴承，从而杜绝了轴承因杂质颗粒结块将阀杆卡死或抱死的现象。

The shaft seal structure uses high temperature resistant non-metallic materials to effectively prevent foreign particles contained in the medium from entering the bearing, thereby preventing the bearing from being stuck or locked due to agglomeration of foreign particles.

填料系统采用碟簧动态加载补偿结构，阀体填料函采用滚挤压，阀杆采用纳米光整，能避免填料处绝对不外漏，达到TA-LUFT标准要求。

The packing system adopts a disc spring dynamic loading compensation structure, the valve body stuffing box adopts roll extrusion, and the valve stem adopts nanometer finishing, which can avoid absolutely no leakage at the packing place and meet the TA-LUFT standard requirements.

零件尺寸加工精度高，密封圈现场可以自由调整和更换。

The part size is processed with high precision, and the seal ring can be adjusted and replaced freely on site.

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