What is the normal temperature range of the water in a closed type expansion tank?

The normal temperature range of the water in a closed type expansion tank typically falls between 180 to 212 degrees Fahrenheit. This range is crucial for maintaining safe operating conditions, as it allows the system to effectively manage thermal expansion of water, ensuring that the pressure does not exceed safe limits.

In a closed system, water is heated, and as it expands, the expansion tank accommodates this increase in volume, preventing excessive pressure buildup. The specified range aligns with the boiling point of water at atmospheric pressure, especially considering that a closed tank is usually pressurized, thereby raising the boiling point slightly. Operating within this temperature range allows for efficient heat transfer and system stability.

The other temperature ranges provided are not suitable for a closed type expansion tank. Higher temperatures could lead to increased pressure beyond safe limits, while lower temperatures might not effectively manage thermal expansion.