Siemens Building Technology 277-03169 Valve Assembly mario both model numbers refer to

both model numbers refer to the same 11-square-inch proportional actuator with standard stroke and spring ranges

For proper installation and to avoid performance issues

Configurable Timing: Field-selectable defrost timer intervals allow for customization based on local climate and frost accumulation rates

ensuring a secure fit and robust flow rate for mid-to-high capacity furnaces

Siemens Building Technology 277-03169 Valve Assembly mario both model numbers refer toThe Siemens Building Technology 277 03169 Valve Assembly is a heavy duty 2 way normally open globe valve designed for precision flow control in demanding hydronic and steam applications. Built with a rugged bronze body and brass trim, this 1 1 2 inch NPT assembly provides a high flow capacity with a 25 Cv rating and an equal percentage flow characteristic for stable modulation. The unit is powered by a high torque 8 inch pneumatic actuator featuring