The SIT FFD Flame Failure Valve 0420003. Designed to provide robust flame supervision, this valve is ideal for a wide range of gas control applications. Flame Supervision Device (FSD): Offers dependable flame failure protection. 1/4” BSPM Inlet and Outlet: Standard connections for easy integration into your system. 1/8” BSPM Pilot Outlet: Comes with a 6mm nut and olive for secure pilot connections. High Operating Pressure: Handles pressures up to 3 bar, making it suitable for demanding applications. Durable Construction: Built to withstand rigorous use and ensure long-term reliability.