Armstrong Fluid Technology 216944-300 320788-704 This Selectra modulation valve is

This Selectra modulation valve is factory-set for high and low fire but allows for field adjustment to match specific BTU requirements

Constructed for durability in demanding residential and light commercial environments

This SPST switch features a durable housing designed to withstand the thermal cycling and vibration common in hydronic heating cabinets

Direct Retrofit: This flame signal amplifier serves as a direct drop-in replacement for legacy R7847A1090 and R7847A1074/U units

providing a linear output directly proportional to the motor’s electrical load

Armstrong Fluid Technology 216944-300 320788-704 This Selectra modulation valve isThe Armstrong Fluid Technology 216944 300 is a high performance Pressure Water Reducing Valve designed for precision in commercial and residential HVAC hydronic systems. This Armstrong RD 11T S model features a robust brass body construction, ensuring long term durability and resistance to corrosion. Engineered with a 1 2" NPT Union Inlet and a 1 2" Female NPT outlet, it simplifies installation in tight piping configurations. The valve is pre