The low-pressure liquid is an alternative method of storing CO2 and is produced either by expanding high-pressure CO2 to a lower pressure or by refrigeration. It is held in specially constructed storage tanks, heavily insulated and equipped with refrigeration units to hold the internal tank pressure at or below 21 bar (304,58 psi) and -18 °C (-0.4 °F) temperature. Pressure switches are incorporated to control the refrigeration units and safety mechanisms and electrical alarms are fitted to release the tank pressure and raise an alarm in the event of refrigeration malfunction.
Low-pressure liquid CO2 (sometimes referred to as “bulk”) is transported to one place from another in insulated road tankers or trailers (or, in some countries, by rail tank wagons), the liquid is simply transferred from mobile to static tank by pumping or gravity feed.
Unlike water, carbon dioxide cannot exist in the open air in liquid form. It must be held under pressure or refrigeration (or a combination of both) to remain in the liquid state.
| Product | Capacity | Low Pressure |
|---|---|---|
| Carbon Dioxide (CO2) | 12 Metric Ton & 16 Metic Ton | 14 kg/cm2 |