Grundfos SE1.85.150.185.4.52H.N.51D.A.T Cast Iron Sewage Pump for Wastewater Handling with S-Tube Impeller

Civil infrastructure maintenance and wastewater collection in large complexes require the SE1.85.150.185.4.52H.N.51D.A.T Submersible Wastewater Pump. This cast iron unit handles contaminated liquids within a liquid temperature range of 10°C to 40°C, supporting performance in municipal lift stations and treatment plants. The heavy-duty design facilitates permanent submerged service while maintaining high volumetric throughput in aggressive environments. It is intended for civil drainage where reliable liquid movement is critical for maintenance and infrastructure protection across an ambient temperature range of -20°C to 40°C.

Technical performance is delivered by an 18.5 kW four-pole motor operating on a 415v three-phase supply with a rated current of 37 Amps. The system achieves a maximum flow of 4986 L/min and reaches a maximum head of 26 m to satisfy high-volume discharge requirements. Starting is managed via a star-delta method to protect the electrical assembly, while the 1479 rpm rated speed ensures steady torque during high-load evacuation. A 15-metre S1BN8-F power cable is provided to facilitate deployment in deep-pit infrastructure and treatment plant pits across municipal networks.

Internal hydraulics utilize a high-efficiency S-TUBE impeller designed to facilitate the passage of solids up to 85 mm without internal contact. This specialized hydraulic configuration provides significant clog resistance and ensures reliable wastewater transfer, reducing the risk of blockages that compromise performance in sewage pumping stations. By enabling the free movement of suspended solids through the housing, the unit maintains volumetric efficiency throughout its service life. This impeller setup is specifically engineered for high-capacity effluent handling where system reliability is critical.

Mechanical integrity is reinforced by a heavy-duty cast iron body and motor shell with an IP68 protection rating for depths up to 20 m. Long-term reliability is anchored by a double mechanical shaft seal featuring silicon carbide faces in an oil bath to shield the motor from liquid ingress. Integrated thermistors and moisture sensors enable proactive monitoring of the Class H insulated motor assembly in aggressive environments. Standardized DN 150 inlet and DN 150 outlet connections allow for seamless integration into municipal wastewater pipework and standardized civil drainage systems.

Features

• S-TUBE impeller design enables the passage of solids up to 85 mm with significant resistance to internal clogging.
• Heavy-duty cast iron housing and motor shell provide the structural durability required for deep submerged installations.
• Double mechanical shaft seal utilizing silicon carbide faces ensures the motor remains shielded from ingress.
• Internal moisture sensors and thermistors provide monitoring to safeguard the Class H insulated motor assembly.
• Four-pole 18.5 kW motor configuration operating at 1479 rpm provides the torque needed for high-volume effluent pumping.
• DN 150 inlet and DN 150 outlet connections allow for high-capacity liquid transfer through standardized pipework.
• IP68 enclosure rating confirms the system is suitable for permanent immersion in aggressive wastewater environments.