Grundfos SE1.85.150.110.4.52H.N.51D.A.T Cast Iron Sewage Pump for Wastewater Handling with S-Tube Impeller

Designed for municipal wastewater applications, the SE1.85.150.110.4.52H.N.51D.A.T Submersible Wastewater Pump combines robust cast iron construction with reliable hydraulic performance. This assembly is built for intensive duty in subsurface collection pits, handling contaminated fluids within a liquid temperature range of 10°C to 40°C. Maintaining consistent throughput is critical for treatment plants and lift stations prone to significant fluid ingress. This unit addresses the need for durable liquid movement where performance must remain stable across varying environmental demands and ambient temperatures from -20°C to 40°C.

Performance is delivered by an 11 kW four-pole motor on a 415v three-phase supply, producing a rated current of 22 Amps. The pump generates a maximum flow of 4986 L/min and reaches a maximum head of 21 m for efficient evacuation of municipal wastewater and sewage. The unit utilizes a star-delta starting method to manage peak electrical loads and operates at a rated speed of 1481 rpm. Power is distributed through a 15-metre power cable to facilitate installation in deep collection pits and subsurface infrastructure across large-scale municipal complexes.

The centrifugal hydraulic system utilizes a high-efficiency S-TUBE impeller to manage solids in suspension up to 85 mm. This configuration provides superior clog resistance and ensures reliable wastewater transfer without the risk of internal contact or blockages. By utilizing an S-TUBE design, the pump maintains consistent efficiency over thousands of service hours in aggressive environments. This hydraulic setup is specifically intended for municipal wastewater transfer where maintaining flow without interruption is a critical priority for system reliability and maintenance.

Mechanical integrity is reinforced by a cast iron pump body with an IP68 enclosure rating for immersion up to 20 m deep. Motor protection is provided by a double mechanical shaft seal featuring silicon carbide faces in an oil bath, ensuring the motor remains protected from liquid ingress. This model includes internal moisture sensors and thermistors for real-time monitoring of the Class H insulated motor assembly. Standard DN 150 connections are used for both inlet and outlet to ensure compatibility with standardized municipal wastewater and civil drainage pipework.

Features

• S-TUBE impeller configuration ensures efficient solids handling up to 85 mm and reduces the risk of internal blockages.
• Heavy-duty cast iron housing and motor shell provide the structural durability needed for deep submerged installations.
• Double mechanical shaft seal with silicon carbide faces ensures the 11 kW motor remains protected from contaminated liquid.
• Class H insulated motor assembly includes integrated thermistors and moisture sensors for proactive monitoring.
• Four-pole motor configuration operating at 1481 rpm provides the torque required for municipal wastewater collection.
• DN 150 inlet and DN 150 outlet ports allow for standardized integration into municipal wastewater pipework.
• Integrated cooling jacket supports operational integrity in both dry and submerged mounting configurations.