Grundfos SE1.95.150.220.4.52H.N.51D.A.T Cast Iron Sewage Pump for Wastewater Handling with S-Tube Impeller

Subsurface collection stations and municipal drainage networks require the heavy-duty performance of the SE1.95.150.220.4.52H.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 lift stations and treatment plants. The robust design facilitates permanent submerged service while maintaining high volumetric throughput in aggressive environments. It is intended for civil infrastructure requiring reliable municipal wastewater transfer across an ambient temperature range of -20°C to 40°C.

Technical capacity is driven by a 22 kW four-pole motor operating on a 415v three-phase supply with a rated current of 41 Amps. This configuration generates a maximum flow of 4986 L/min and achieves a maximum head of 29 m to satisfy specific site discharge requirements. The motor operates at 1476 rpm and utilizes a star-delta starting method to manage peak electrical loads during initial activation. Power is distributed through a 15-metre power cable to facilitate deployment in deep subsurface wastewater handling pits and high-capacity collection stations prone to high ingress.

Internal fluid pathways utilize an S-TUBE impeller configuration to facilitate the passage of solids up to 95 mm without internal contact. This hydraulic design ensures high efficiency and reliable wastewater transfer, reducing the risk of internal blockages during continuous duty in municipal networks. The S-TUBE impeller is engineered for durability, maintaining volumetric efficiency throughout thousands of operating hours in aggressive sewage. This configuration is specifically intended for municipal wastewater transfer where system reliability is critical for infrastructure protection and facility maintenance.

Mechanical integrity is reinforced by a heavy-duty cast iron housing and an IP68 protection rating for depths up to 20 m. Reliability is anchored by a double mechanical shaft seal with silicon carbide faces in an oil bath to protect the motor from liquid ingress. This model includes integrated thermistors and moisture sensors for proactive monitoring of the Class H insulated motor assembly. Standardized DN 150 inlet and DN 150 outlet connections allow for standardized integration into municipal wastewater pipework and civil drainage infrastructure.

Features

• S-TUBE impeller design enables the passage of solids up to 95 mm with significant resistance to internal clogging.
• Heavy-duty cast iron housing and motor shell provide the structural durability required for submerged installations.
• Double mechanical shaft seal utilizing silicon carbide faces ensures the 22 kW motor remains shielded from ingress.
• Internal moisture sensors and thermistors provide monitoring to safeguard the Class H insulated motor assembly.
• Four-pole motor configuration operating at 1476 rpm provides the torque needed for high-volume wastewater transfer.
• DN 150 inlet and DN 150 outlet connections allow for high-capacity liquid transfer through standardized plumbing.
• IP68 enclosure rating confirms the system is suitable for permanent immersion in aggressive submerged environments.