Grundfos SE1.85.150.130.4.52H.N.51D.A.T Cast Iron Sewage Pump for Civil Drainage with S-Tube Impeller

Internal fluid pathways and hydraulic configuration in the SE1.85.150.130.4.52H.N.51D.A.T Submersible Wastewater Pump are optimized for the intensive transfer of contaminated liquids. This cast iron unit provides a professional solution for lift stations and drainage stations where the liquid temperature range is 10°C to 40°C. Maintaining steady flow behavior during continuous duty is necessary for infrastructure protection and facility maintenance. It is intended for submerged or dry installation in aggressive environments where consistent effluent transfer is required for civil works and large-scale water management.

Hydraulic capacity is provided by a 13 kW four-pole motor on a 415v three-phase supply, generating a maximum head of 23 m and a maximum flow of 4986 L/min. Operating with a rated current of 25 Amps at 1483 rpm, the pump maintains stable pressure for high-volume discharge in municipal networks. A star-delta starting method is utilized to optimize electrical consumption and manage start-up loads in deep-pit applications. Electrical connection is established via a 15-metre power cable to facilitate deployment in municipal sewage handling pits and treatment plants.

Internal hydraulics utilize a high-efficiency S-TUBE impeller designed for the movement of solids up to 85 mm without internal contact. 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 necessary for system maintenance and protection of civil assets.

Mechanical construction features a heavy-duty cast iron body with an IP68 protection rating for depths up to 20 m and an ambient temperature tolerance of -20°C to 40°C. Long-term reliability is supported by a double mechanical shaft seal featuring silicon carbide faces in an oil bath for motor protection. This model includes integrated thermistors and moisture sensors for proactive monitoring of the Class H insulated motor assembly. Standard DN 150 inlet and DN 150 outlet connections allow for seamless integration into municipal wastewater and civil drainage pipework.

Features

• High-efficiency S-TUBE impeller manages solids up to 85 mm with significant resistance to clogging and blockages.
• Heavy-duty 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 13 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 configuration operating at 1483 rpm provides the torque needed for high-volume sewage transfer.
• DN 150 inlet and DN 150 outlet ports allow for standardized integration into municipal wastewater pipework.
• IP68 enclosure rating confirms the system is suitable for permanent immersion in aggressive submerged environments.