Atlas Copco has launched 18 new additions to its open frame diesel-driven centrifugal dewatering pump range. The expanded PAS range is suitable for multiple applications including dewatering on construction and mining sites, solids removal, drainage, and emergency situations involving flooding and shipping. The PAS open-frame system includes both wet and dry prime options, and the modular design allows many different configurations.
The pumps provide a wide range of sizes, with performance levels from 105 m3/h to 630 m3/h, and discharge size ranging from 7cm to 20cm. The PAS open-frame system comprises a centrifugal pump, semi-open impeller, and a large separator. This enables air to be separated from the liquid and sucked by the vacuum pump, allowing automatic priming.
The dry prime variants offer rapid priming time and higher capacities, making them suitable for use over a longer period of time when there is a danger of running dry or experiencing an intermittent flow. Wet prime pumps are portable and cost-effective, suitable for applications with a consistent flow.
The range benefits from mechanical shaft seals being set in an oil bath, which enables dry running capability without damage. A high efficiency hydraulic end lowers fuel consumption, while a high capacity diaphragm pump supports automatic priming. The semi-open impeller enables the pumps to handle solids of various sizes, without the risk of clogging. Additionally, all components are easy to access, allowing for simple servicing and maintenance.
The wide range of sizes in the portfolio starts with the 6.4kW PAS3, a wet prime pump with a maximum flow capacity of 120m3/h, a discharge size of 7cm and a maximum head of 24.5m. It is able to handle solids of up to 40mm and benefits from an air cooling system and 4.5 hours of fuel autonomy. The dry-prime PAS8 operates at a head of up to 30m, offers a discharge size of 8ins and handles solids of up to 76mm with a maximum flow of 630m3/h.
The PAS range has for several years been available in a dry prime, canopy version with 10cm, 15cm, and 20cm variations, handling flows up to 590 m3/h. The company also offers a range of portable, powerful and efficient electrical submersible pumps. The WEDA range can manage flows from 225 to 16.500 litres per minute with a maximum head of 85m.