The main function is to purify from dissolved water, dissolved hydrocarbon, to remove suspended particles and to obtain a clean gas for different use.

Mainly, the cleaned gas is used in gas heaters or in other burners.

The lay out of this type of systems can be different, specially considering redundancy requirements from users. Generally, the system consists of pressure regulators, gas scrubbers with vain, cartridges, demisters, ecc., some heaters and, if required, the metering part also.