The main parts of a station
A CNG station takes natural gas from a pipeline, cleans and dries it, compresses it to high pressure, stores it in a cascade of cylinders, and dispenses it to vehicles. Each stage has its own equipment and its own safety devices.
Gas supply and conditioning
The incoming line is metered and its pressure is regulated. The gas then passes through filters and a dryer, because moisture in high-pressure gas can freeze or corrode equipment.
Compression and storage
Compressors raise the pressure to the level used for vehicle storage. A storage cascade of several banks lets the dispenser fill vehicles quickly without running the compressor flat out for every fill.
Dispensing
Dispensers measure the gas, control the fill and stop automatically at the correct pressure. Breakaway couplings, emergency stops and gas detection protect customers and staff.
Choosing a site
Good sites combine a gas connection that is close or affordable, enough area for the layout and safety distances, easy vehicle entry and exit, and a steady flow of customers. The distance to the pipeline often decides how viable a site is.
Approvals and commissioning
A CNG station needs authority approvals and a licence before it operates, and requirements depend on the location and the gas network. After installation the station goes through pressure and leak tests, safety-system checks and a trial run before it opens.
Thinking about a CNG station or a gas conversion project? Tell us about the site and we will outline the scope.