Grundfos SE1.85.100.170.4.52H.N.51D.A.T Cast Iron Sewage Pump for Civil Drainage with S-Tube Impeller

Municipal sewage handling in large-scale complexes requires robust pumping assets built for intensive subsurface duty in permanent submerged environments. The Grundfos SE1.85.100.170.4.52H.N.51D.A.T Submersible Wastewater Pump addresses these demands by providing reliable liquid movement for effluent management. This unit handles contaminated fluids at temperatures up to 40°C, ensuring consistent performance in lift stations and drainage pits. The cast iron construction supports infrastructure protection and municipal wastewater transfer duties across varying liquid levels in civil networks.

Performance is provided by a 17 kW four-pole motor on a 415v three-phase supply, generating a maximum head of 24 m and a maximum flow of 4986 L/min. Operating with a rated current of 36 Amps at 1480 rpm, the unit maintains stable pressure for high-volume wastewater evacuation. A star-delta starting method is utilized to optimize electrical consumption and manage start-up loads in municipal networks. Electrical connection is established via a 15-metre power cable to facilitate deployment in deep-pit infrastructure and treatment plants.

Internal hydraulics utilize a high-efficiency S-TUBE impeller configuration designed for the movement of solids up to 85 mm without internal contact or clogging. This design prevents the blockages that compromise volumetric efficiency during prolonged service in sewage pumping stations. By utilizing S-TUBE hydraulics, the assembly provides superior clog resistance and ensures reliable wastewater transfer in intensive municipal service. This configuration is specifically engineered for high-capacity liquid handling where consistent performance is required for maintenance.

Mechanical integrity is reinforced by a cast iron pump body and motor shell with an IP68 protection rating for depths up to 20 m. Long-term reliability is supported by a double mechanical shaft seal featuring silicon carbide faces in an oil bath for motor insulation. This model includes integrated thermistors and moisture sensors for proactive monitoring of the Class H insulated motor assembly. Standard DN 150 inlet and DN 100 outlet connections allow for seamless integration into municipal wastewater and drainage infrastructure.

Features

• High-efficiency S-TUBE impeller manages solids up to 85 mm with significant resistance to clogging and blockages.
• Cast iron pump housing and motor shell provide the structural durability needed for deep submerged installations.
• Double mechanical shaft seal with silicon carbide faces ensures the 17 kW motor remains protected from contaminated liquid.
• Class H insulated motor assembly includes integrated thermistors and moisture sensors for real-time monitoring.
• Four-pole motor operating at 1480 rpm provides the torque required for municipal sewage handling.
• DN 150 inlet and DN 100 outlet ports allow for standardized integration into municipal wastewater pipework.
• Integrated cooling jacket supports operational integrity in both dry and submerged mounting configurations.