CNG Gas Dryer - Single Tower Natural Gas Dryers, inlet 150 psi, flow 1600 scfm

What pressure, flow and temperature is it rated for?

This unit is rated for 150 PSIG inlet pressure and 1600 SCFM flow. Operating temperature range is not specified in the listing; you'll need to confirm this with the seller, though CNG dryers typically operate from -20°F to 120°F ambient depending on configuration.

What gases is it compatible with, and has it been oxygen cleaned?

This dryer was used for natural gas service. Single tower desiccant dryers like this can typically handle natural gas, nitrogen, instrument air, and other non-corrosive gases, but switching between services requires regeneration of the desiccant bed and verification of material compatibility. The listing does not indicate oxygen cleaning, and unless explicitly stated, you should assume it has not been oxygen cleaned and is not suitable for oxygen service without proper cleaning and certification.

What should I inspect before putting it into service?

Inspect the desiccant condition (may need replacement given the unit's age), check for moisture in the outlet indicating breakthrough, and examine all valves for proper seating and cycling. Verify vessel integrity with thickness testing if NDT records aren't available, inspect piping and connections for corrosion, and confirm the regeneration system (heater, blower, or purge gas system) is functional. Request maintenance records and the last dew point performance data from the seller.