seat, is therefore able to withstand a greater amount of pressure, compared to resilient seated butterfly valve, the seal of the eccentric disc could be either metl/Graphite multi-layer design, or fully metl-to-metl design. The multi-layer design could achieve zero leakage and simple maintenance, while the metl-to-metl design is more reliable in higher temperature and pressure. Basically speaking, triple eccentric butterfly valve is both applied in shutoff or throttling service.5, Flanged butte