Atlas Copco has launched two new liquid ring vacuum pumps for use in industrial processes. Capable of operating reliably in humid and dusty environments, the sturdy AWS and AWD units are designed

to deliver vacuum to a range of industries “Our latest liquid ring pumps combine a low-maintenance design with highly efficient performance and near-silent running,” said UK vacuum product manager Richard Oxley. “They are extremely well suited for wet or corrosive processes and offer short lead times and minimum life cycle costs.”

Capacities for liquid ring pumps typically range from 170 to 37,500m³/h. Lower capacity units below 5500m³/h are available as single-stage AWS models or two-stage AWD models pre-configured with direct-drive options in 50 and 60 Hz speeds. For larger installations, high capacity AWL pumps with belt or gearbox transmission are available.

Single stage AWS pumps offer efficiency above 200 mbar (absolute), so are suitable for general process applications such as filtration and dewatering, and pump down or evacuation duties. Meanwhile, the two-stage AWD pumps provide continuous high performance at operating pressures below 200 mbar (absolute). Two synchronised pump chambers work in series for improved efficiency on continuous process duties such as drying, degassing exhausting and solvent recovery.

All AWS and AWD pumps can achieve ultimate pressure levels as low as 30mbar (absolute). They are available in three pre-engineered modular configuration designed for once-through, partial recirculation of total recovery of service water.