AutoFill™ Automatic Filling Valve Combo Overview
Discover the advanced functionality of the AutoFill™ automatic filling valve combo in this detailed internal cutaway video guide by Caleffi North America. This walkthrough provides a close-up look inside the mechanical components of this multi-function boiler feed valve, demonstrating how it safeguards sealed hydronic heating systems by automatically maintaining optimal system pressure.
Installed directly on the water inlet piping, the AutoFill™ combo monitors loop pressure and automatically introduces make-up water as required, ensuring the system remains properly charged without manual intervention.
Key Internal Components Covered in This Overview
Pressure Reducing Valve with Compensating Seat: Understand how the internal seat configuration neutralizes the impact of upstream supply pressure fluctuations to deliver exceptionally stable downstream pressure regulation.
Visual Pressure Setting Indicator: See how the top-mounted adjustment dial allows contractors to pre-set the target system pressure and read it directly before commissioning the system.
Inlet Filter & Anti-Scale Internals: Examine the built-in mesh filter that traps incoming sediment, alongside specialized internal parts designed to minimize mineral scale encrustation and prevent sticking.
Integrated Shut-Off & Check Valves: Explore the safety architecture of the assembly, which includes a robust inlet check valve to prevent backflow contamination and an integrated manual isolation valve (operated via the round knob on the bottom).
Contractor & Installer Note: Manual filling or guessing system pressure during a boiler commission can lead to chronic air lock issues or premature relief valve lifting. The AutoFill™ visual indicator removes the guesswork, allowing you to calibrate your exact target pressure before introducing water to the circuit.
To learn more about the AutoFill™ series and Caleffi North America's complete family of hydronic system components, visit the official website: https://www.caleffi.com