How to refuel the CNG vehicle and how long does it take?

How to refuel the CNG vehicle and how long does it take?

A CNG vehicle is filled by connecting the suitable nozzle to the car filling valve, generally situated into the engine compartment or next to the petrol filler.
In a modern filling station supplying CNG by weight, the refuelling can take 2 or 3 minutes on a mid-size vehicle (80 – 100 lt cylinder).