Fire Safe Seated (API 607 Approval)
High Performance Butterfly Valves
The HUAMEI Fire Safe Seated high-performance butterfly valves (HPBFV) is the fire-safe, soft seat quarter-turn valve. The fire safe design incorporates two patented seats which function together to seal off pipeline flow. In normal operation, the soft seat provides a bi-directional “bubble tight” shutoff (zero leakage); the metal seat provides bi-directional shutoff in the event of a fire, in conformance to industry fire-safe requirements. With little or no pressure, the Fire-Safe seat creates a self-energized seal against the disc. Higher line pressures act on the geometry of both seats to dynamically load them against the disc, creating higher sealing forces in either direction.
The Fire-Safe metal seat is made of 316L material which is shaped by a proprietary hydroforming process into its unique, patented design. Stainless steel outer bearings are included for post-fire disc and shaft alignment. Fireproof packing is used to prevent external shaft leakage. The Soft Seat High-Performance Butterfly Valves is designed for high services with minimal wear and low torque. Seat replacement is a simple operation, requiring no special tools.