WEFLO F1033-300, Butterfly Valve, Groove x Groove, UL/FM Listed.

The WEFLO F1033-300 is a high-performance, UL-listed and FM-approved butterfly valve designed for fire protection systems. Rated for 300 psi working pressure, it delivers reliable flow control and bubble-tight shutoff in demanding fire suppression, water distribution, and HVAC applications. Key Features & Benefits Vulcanized/EPDM-encapsulated disc for reliable bubble-tight shutoff at full 300 psi rating. Gear operator with built-in supervisory (tamper) switch for code-compliant monitoring. Single-piece through shaft design ensures smooth, low-torque operation and long cycle life. Fusion bonded epoxy coating (interior and exterior) per AWWA C550 for superior corrosion resistance. Flag-type position indicator for quick visual status. Meets or exceeds EN 593, MSS SP-67, and other industry standards. Working temperature: 42°F – 180°F (5.5°C – 82°C). Ideal For Fire sprinkler systems, standpipes, risers, and other UL/FM-required fire protection piping where a compact, high-pressure butterfly valve with supervision is needed. Available in sizes 2-1/2" through 12". WEFLO valves are engineered for durability, easy maintenance, and full compliance with fire protection codes. Backed by strong manufacturer support and competitive pricing for contractors and distributors. WEFLO F1033-300 Data Sheet