Rapidrop Bronze Butterfly Valve Threaded 1 1/2″ FM Approved, UL Listed

The Rapidrop 1 1/2-inch (DN40) Threaded Bronze Butterfly Valve is an industrial-grade small-bore fire protection zone valve designed with minimized flow restriction and pressure loss when fully opened. Built with a high-strength cast bronze body featuring female NPT threaded end connections, it integrates smoothly into standard threaded branch lines or commercial fire sprinkler configurations. The valve utilizes a slow-closing quarter-turn handwheel gearbox to actively suppress potential line water hammer spikes within the piping. Fluid isolation relies on a premium 304 stainless steel disc sealing against an EPDM/Viton seat, delivering dependable bidirectional, bubble-tight shut-off under standard fire infrastructure working pressures. It comes standard with a factory-integrated, pre-wired dual-circuit tamper supervisory switch assembly inside a rugged junction box, allowing immediate hookup to central alarm panels to track unexpected valve closure