The system consists of a self-priming centrifugal pump and a Simplex separator which enables air to be separated from the liquid and be sucked by a vacuum pump - making automatic priming possible. Even with suction heights of several meters the machine rapidly evacuates the air from the suction pipe and starts to pump. - The WEL ECO is capable of drawing significant quantities of air and maintaining a wellpoint system under vacuum, or draining an excavation, thanks to the semi-open impeller which also makes it suitable for pumping liquids with solids in suspension. - Rapid "dry" priming Up to a height of 8.5 m (27.5 ft) - High resistance To abrasive liquids and turbid sandy waters - Semi-open impeller Solids handling up to 76 mm (3") - Rotary vane vacuum pump Lubricated with oil recovery system and coalescing filters: no contamination of the environment - Wear plates Cast iron (G11 rubber lined) or stainless steel wear plates, that are easily replaceable Qmax / 340 m3/h - 5.670 l/min (1,500 USgpm) Hmax / 27,5 m (90 ft) Q max eff. / 240 m3/h - 4.000 l/min (1,100 USgpm) Eff. max / 62 % Suction port / Flanged - DN 150 D.I. 1882 (6") Delivery port / Flanged - DN 150 D.I. 1882 (6") Impeller type / Semi-Open, 2 vane Solids handling / 76 mm (3.0 ") Material / S275JR EN 10025-2 carbon steel Coatings / Epoxy powder, average thickness of 80 μm Color / Yellow and grey Atlas Copco (standard) Features / Modular and demountable framework; hot dip galvanised steel support bases, bullbars and lifting beam. Mudguards with galvanised steel walkable surface. Tow bar, adjustable support feet. Lockable battery box. Fuel level indicator. Battery / Acid charge Pb-Ca maintenance free 12 V - 100 Ah - 400 A Tank / 300 l (79.3 USG) Locking keys / Fuel cap Dimensions / 1410 x 2330 x 1880 mm 56 x 92 x 74 " H suction port / 1,17 m (3.8 ft) Weight (KL10) / 1120 kg (2,470 lb) Weight (ZD35) / 1130 kg (2,490 lb)