Grundfos SE.56L.185.6.50D.300 Cast Iron Low-Head Wastewater Pump for Stormwater Drainage with Open S-tube Impeller

Flood control projects and municipal stormwater drainage networks rely on the high-volume transfer capabilities of the SE.56L.185.6.50D.300 for centralized collection. This 6-pole cast iron pump is intended for municipal and industrial wastewater applications where untreated effluents containing solids must be moved. It is engineered for permanent service in infrastructure where liquid temperatures range from 0°C to +40°C.

The pump achieves a maximum flow up to 20940 L/min and a maximum head of 15 m when powered by an 18.5 kW motor. Drawing 48 Amps on a 415 V supply, the unit utilizes an internal cooling jacket for thermal safety. This integrated cooling allows for reliable operation during high-capacity transfer cycles in wastewater infrastructure.

Central to its hydraulic performance is the Open S-tube impeller with a 379.4 mm diameter and a large 105 mm free passage for managing untreated wastewater containing solids. The nominal duty head is 8.28 m. Equipped with dual 300 mm inlet and outlet DIN flanges, the design supports high-volume transfer while reducing the risk of clogging in municipal collection systems.

Structural durability is provided by an EN-GJL-250 cast iron pump housing and motor casing, featuring double mechanical SiC/SiC shaft seals. Safety systems include integrated PTO sensors, moisture switches, and leakage sensors for comprehensive motor health monitoring in centralized stations. The unit is supplied with a 10-metre S1BC4N8-F EMC power cable and an IP68 enclosure.

FEATURES

• Open S-tube impeller with 379.4 mm diameter and 105 mm passage for managing untreated wastewater.
• EN-GJL-250 cast iron pump housing and motor casing for structural integrity in utility networks.
• Double mechanical shaft seal with SiC/SiC primary faces and Silicon Carbide/Carbon secondary barrier.
• Integrated PTO sensors, moisture switches, and leakage sensors for motor protection and monitoring.
• Internal cooling jacket system facilitating thermal stability in both wet and dry installations.
• Supplied with a 10-metre S1BC4N8-F EMC power cable for reliable connection in drainage sumps.
• IP68 enclosure suitable for installation depths up to 30 metres and 5 bar maximum pressure.
• Compatible with the Grundfos DN300 auto-coupling system (96255839) for simplified maintenance access.

IMPORTANT: Bulk freight charges apply. Please contact us for a freight quote before ordering.