- Expansion Tanks
HGV expansion tanks are a component of the coolant system in heavy goods vehicles (HGV). They are designed to accommodate the expansion of coolant caused by temperature changes, and to maintain a consistent level of coolant in the system. The expansion tank is typically a plastic or metal container that is connected to the radiator, and is filled with a mixture of coolant and air. It allows coolant to expand and contract as the temperature changes, preventing the system from becoming pressurized and releasing coolant through the pressure relief valve. It also helps to maintain the coolant level by providing a reservoir for the coolant that is expelled from the system due to thermal expansion. It is important to regularly check and maintain your expansion tank to prevent coolant loss and overheating.