this differential air pressure switch is the industry standard for verifying fan proof of flow and preventing unsafe operating conditions in commercial boilers and air handlers

This TOD Series 60T limit control is a direct cross-reference for part number 73K1801 and is frequently found in G23 and G24 series furnaces

The ASCO 238212-058 is a high-performance replacement solenoid valve coil engineered for industrial HVACR and process control applications

Smooth Wrapped Construction: Neoprene-wrapped jacket reduces vibration and provides quiet operation in sound-sensitive air handling zones

Conbraco 10-407-05 Valve 318518-761 this differential air pressure switchThe Conbraco 10 407 05 is a high capacity ASME Section IV hot water relief valve designed for commercial and residential boiler systems. Featuring a rugged brass body and high temperature silicone seat, this valve is engineered for durability in demanding hydronic heating systems. It operates with a 3 4" male NPT inlet and a 3 4" female NPT outlet, providing a direct connection for standard hot water pressure relief valve piping. Factory set at 30