90" WC to match original engineering specs for HE Series 3 boilers

it features a pressure-sensitive interrupter that safely disconnects the internal circuit if internal pressure exceeds safe limits

Designed as a direct swap-out for the E3Point gas detection platform

matching the exact OEM part number is critical for internal orifice sizing and bulb charge compatibility

This differential pressure switch is factory-calibrated to a

Ruskin FL-212A Fuseable Link 340155-7026 90" WC to match originalThe Ruskin FL 212A fusible link is a 212F thermal response device engineered for high heat industrial and commercial ventilation environments. Designed for UL Classified safety, this component is essential for fire damper maintenance and replacement in fire rated systems. When the ambient temperature reaches its critical 212F (100C) melting point, the eutectic alloy breaks, triggering the fire damper closure via spring return to prevent the passage of