CNG dispensers use pressure compensation algorithms to balance the difference between vehicle tank pressure and station storage pressure. As the vehicle tank fills, pressure inside rises, slowing the flow of gas. The dispenser monitors this in real time and adjusts flow to maintain stability.
The compensation system ensures the maximum amount of usable gas is transferred without exceeding safety limits. It also prevents incomplete fills caused by pressure equalization issues. This makes fueling more consistent across different vehicles and environmental conditions.
Advanced dispensers include sensors that track temperature and density changes to optimize compensation. These features allow stations to deliver predictable fueling performance, reduce complaints about partial fills, and maintain high customer satisfaction.