The "on road transportation of CNG has been extensively used, in Italy and abroad, since more than 60 years with a consolidated technology and with low operating costs.

Still today, where gas pipeline is not present, the CNG is delivered continuously through a network of stations not connected to pipelines (Daughter Stations).

Mobile trailers are filled in a gas compression station (Mother Station) preferably connected to an high pressure pipeline.

Typically a Mother Station is equipped with one or more compressor with one or more high range compressors according to the gas volume to be supplied and to the required maximum filling time.

The supply of natural gas therefore, with all the advantages both of economic character that environmental - low cost of purchase, low issue of pollutants -  can also be brought in the isolated and remote places, where the construction of a pipeline or a fixed distribution system would not be economical or of difficult realization.

Daughter Stations: maximum

re-compression efficiency

In the Daughter station gas is delivered to vehicles by means of a compressor directly connected to the trailer or to a local storage, used when a single trailer is used to refill more than a station.

safe s.r.l typical solution is based on hydraulic compressor, while were high capacity is required, ST  and SW compressor are also well suited for these application.

Our solutions are characterized by a wide inlet pressure range that may span from 250 bar down to 10 bar. This feature does not require a gas pressure reduction system that is necessary in case a standard compressor is used for re-compression.

The results are:

• High efficiency

• Minimum requirements for installed electric power

• Simple and compact station layout

• High reliability

• Cost efficient solution