Triple Eccentric Butterfly Valve

components of the triple eccentric butterfly valve

With the unique sealing structure, the triple eccentric butterfly valve has been occupying a prosperous popularity. When the sealing face is under the closed status, the compression has been balanced to the whole surface to hold the high pressure capability. When it is going to be opened, the sealing face would be unattached from the valve seat without the squeeze. And the travel route is short resulting from the simple but compact structure. Besides, it enables the two-way flow off and long service life.

Actually, the ring is employed in many specified components of the triple eccentric butterfly valve. The seal available for the valve clack would be the soft seal, hard and soft layering seal, welding carbide seal and stacked multi-layer metal seal. It is suggested to choose the proper seal according to the specific requirements. The soft seal is applicable for the condition with common temperature and low pressure because it is usually made from the PTFE and PTFE. And it holds good property with low cost. The hard and soft layering seal takes advantages of the hard seal and soft seal in order to be suitable to high temperature with good tightness. The stacked multi-layer metal seal aims to multiply several hardened stainless steel sheets in order to achieve the flexible compensation. Thus, it is applicable for close cutting off and the working conditions with rather high temperature and pressure. And the welding carbide seal is appreciated to withstand high temperature and pressure. What else, it is good to resist the corrosion and affect well at regulating the flow.

The materials for other components of the triple eccentric butterfly valve are carefully chosen to meet the generally serious and complex specifications.

design of the triple eccentric butterfly valve

The specified design to the seal of the triple eccentric butterfly valve has contributed a lot to the popularity of the triple eccentric butterfly valve. There are three main types of the eccentric butterfly valve. The structures for the single eccentric butterfly valve and the double eccentric butterfly are not able to solve the erosion and the leakage well. Therefore, the triple eccentric butterfly valve has successfully solved those unpleasant situations, which is greatly determined by the unique structure.

The valve clack of the triple eccentric butterfly valve is the thick entity with oval shape which is intercepted from the corn. Actually, it holds three eccentrics to enable the good tightness and the high performance. The first eccentric refers that the sealing face of the valve seat is deviated from the centre of the valve stem. The second one refers that the valve stem is deviated from the center of the channel. And the last eccentric is that the axis of the corn seal face is deviated from the centerline of the valve itself.