1.ISO 5211 Top Flange: The top flange is used when the valve is in bare shaft, which is used for installing actuators. The size of the top flange is strictly in accordance with the international standard ISO 5211.
2.Dynamic Packing Loading System: In the leakage of the valve, it is traditionally concentrated on the leakage of the valve seat, that is, the internal leakage, while ignoring the leakage of the packing, that is, the external leakage. In the packing seal and other structures to prevent external leakage, the design of the spring washer is adopted to keep the packing always in a compressed state, and constantly release the elastic force to the packing, continuously releasing elastic force to the packing, so that the packing maintains a long-term seal and extends the packing maintenance-free period.
3.Anti Blow-out Design: Prevent the internal valve stem from being pressurized, and the valve stem rushing out of the valve.
4.Self-lubricating Shaft Sleeve: The ultra-low friction coefficient self-lubricating sleeve reduces the friction between the valve stem and the sleeve, making the butterfly valve easy to open and close.
5.Bi-Direction Sealing Design: Bi-direction sealing is achieved, which can bear pressure in both positive and negative directions. This series could reach zero-leakage requirement when bearing pressure in both positive and negative directions.
6.Valve Seat Type: PTFE, R-PTFE fire-safe seat, etc.
7.Fire-safe Structure and Design: The Metal to Metal sealing parts structure makes the valve fire safe, and the test results comply with API 607.
8.Easy Maintenance of Valve Seat: just remove the inserts to replace the valve seat, no need to disassemble the butterfly valve and shaft.
