The coolant tank or reservoir is a critical component of coolant systems that serves as a storage and supply vessel for coolant fluid. It maintains proper coolant levels, allows for thermal expansion of the fluid, provides a visual indicator for coolant level monitoring, and often serves as a filling point for the system. In many systems, it also functions as a degassing chamber to remove air bubbles from the coolant. This component is used in machinery and equipment manufacturing, where it is integrated into cooling circuits to ensure consistent coolant availability and system stability. The tank is typically manufactured from materials such as polypropylene, high-density polyethylene, stainless steel, or aluminum, depending on the application requirements. Key parameters include capacity (10–500 L), operating pressure (0.1–0.6 MPa), operating temperature (-20 to 80 °C), wall thickness (2–6 mm), leakage rate (≤0.01 mL/min at rated pressure), surface finish (≤0.8 μm Ra, per ISO 1302), weight (5–200 kg), inlet/outlet connection (G1/4–G2, per ISO 228-1), pressure drop (≤0.05 MPa at rated flow), flow rate (5–100 L/min), and IP rating (IP54–IP65, per IEC 60529). Material grades such as 304/316L stainless steel are referenced per ASTM A240, with 316L recommended for corrosive coolants. These values are directory reference ranges and must be confirmed for the specific model and application. The tank operates by providing a sealed or vented reservoir that connects to the main coolant circulation system, maintaining a reserve of coolant that can be drawn into the system as needed. It compensates for thermal expansion and contraction, allows for visual inspection and replenishment, and in pressurized systems, maintains system pressure while accommodating volume changes. When selecting a coolant tank, consider system flow rate, heat load, and compatibility with the coolant. Verify model-specific parameters and standards with the legal manufacturer or supplier.
The coolant tank operates by providing a sealed or vented reservoir that connects to the main coolant circulation system. It maintains a reserve of coolant that can be drawn into the system as needed, compensates for thermal expansion and contraction of the coolant, and allows for easy visual inspection and replenishment of coolant levels. In pressurized systems, it maintains system pressure while accommodating volume changes. The tank may also serve as a degassing chamber to remove air bubbles, ensuring efficient heat transfer and preventing cavitation. Its design must accommodate the specified operating pressure and temperature ranges, with appropriate wall thickness and material selection to ensure structural integrity and leak-tightness.
