Which type of gasoline vapor recovery system is most commonly used today for both stage 1 and Stage 2 applications?

The balance system is most commonly used today for both Stage 1 and Stage 2 gasoline vapor recovery applications due to its effectiveness in minimizing vapor emissions during fuel dispensing and truck loading processes. In the balance system, vapors displaced from the tank as gasoline is pumped are returned to the delivery vehicle during refueling. This creates a balance between the inflow of fuel and the outflow of vapors, thus capturing and reducing the emissions released into the atmosphere.

This system is particularly advantageous because it requires less complex equipment and lower maintenance compared to other systems, making it a practical choice for fuel stations looking to comply with vapor recovery regulations while maintaining operational efficiency. The balance system's ability to efficiently manage vapor displacement during both stages contributes to its widespread adoption in modern gasoline handling practices.