Designated as ‘J’ for drainage and ‘JS’ for sludge, the new J4, J7, JS4, JS7 and JS8 models offer flowrates from 5.5 l/s with heads up to 16 m. Their slim design and low weight of construction make them easy to transport between locations and set up for work. Stainless steel construction ensures long-term reliability against erosion and corrosion.
The pumps are designed for safe and effective operation without supervision. The float switch provides automatic level control and ensures water levels are maintained reliably while the built-in sensors protect the motor from overheating. The natural cooling provided by the double outer casing enables the pumps to run continuously at low levels and even run dry without damaging the electric motor.
In drainage and sludge applications, the impeller must be able to withstand the harsh pumping environment and Sulzer’s design includes adjustable wear parts and a nitrile rubber coating for maximum abrasion resistance. The JS models are equipped with an agitator at the base of the pump to ensure continuous flow of sludge and to prevent airlocks in the pump, minimizing the risk of clogging.