Grundfos SL.150.110.4.52H.N.51D.A.T Cast Iron 4-Pole Sewage Pump for Sewage Transfer with Open S-Tube Impeller

Sewage collection systems in large-scale municipal complexes require the handling of contaminated liquids at varying flow rates to prevent system stagnation. The Grundfos SL.150.110.4.52H.N.51D.A.T facilitates reliable wastewater transfer in environments where fluid temperatures range from -10 to 40°C. This submersible unit supports continuous service in drainage stations and effluent collection pits. Maintaining structural integrity during permanent immersion is necessary for subsurface infrastructure protection and facility maintenance.

Hydraulic behavior for the Grundfos SL.150.110.4.52H.N.51D.A.T is driven by an 11 kW four-pole motor operating on a 415v three-phase supply with a rated current of 23 Amps. This configuration generates a maximum flow of 6,660 L/min and achieves a maximum head of 22.4 m to satisfy municipal wastewater transfer requirements. The motor utilizes a star-delta starting method to manage peak electrical loads during initial activation cycles in deep pits. Consistent pressure behavior ensures the system satisfies the requirements of municipal lift stations and drainage networks.

The Open S-Tube centrifugal impeller configuration facilitates the passage of solids in suspension without the internal clogging that compromises volumetric efficiency over long-term service. By utilizing a high-efficiency hydraulic profile, the unit minimizes internal friction and vibration to protect the rotating assembly during high-volume discharge. This design handles wastewater, maintaining circulation stability throughout thousands of operating hours in municipal collection systems. The impeller setup is intended for sewage pumping where reliable flow behavior is required.

Construction utilizes heavy-duty cast iron for the pump housing and motor shell with an IP68 protection rating for immersion up to 20 m. Longevity is anchored by a silicon carbide primary shaft seal and a silicon carbide/carbon secondary seal in an oil bath for motor insulation. This model includes integrated thermistors and moisture sensors to facilitate proactive monitoring of the motor assembly. The architectural casting includes a 302 kg net weight and DN 150 connections for high-capacity integration into standard wastewater infrastructure.

Features

• Open S-Tube impeller design enables the passage of solids through the pump casing without compromising volumetric hydraulic throughput.
• Cast iron pump housing and motor shell provide a rigid structural foundation for permanent submerged installations up to 20 m deep.
• Double mechanical shaft seal utilizing silicon carbide faces in an oil bath ensures the motor remains shielded from liquid ingress.
• Internal thermistors and moisture sensors provide real-time monitoring to safeguard the electrical assembly against overheating.
• Four-pole motor configuration operating at 1,481 rpm provides the hydraulic torque needed for processing high-volume wastewater.
• Standardized DN 150 inlet and DN 150 outlet connections allow for high-capacity liquid transfer through municipal plumbing networks.
• High-efficiency 11 kW motor utilizes a star-delta starting method to stabilize electrical current consumption during high-load activation.