Grundfos SL.100.170.2.52S.N.51D.A.T Cast Iron 2-Pole Sewage Pump for Sewage Handling with Open S-Tube Impeller

Internal fluid velocity paths and hydraulic configuration for the Grundfos SL.100.170.2.52S.N.51D.A.T utilize an Open S-Tube design to manage contaminated liquids. This submersible pump addresses the circulation stability required in municipal collection pits and sewage transfer duties. The assembly is optimized for continuous wastewater transfer in environments prone to varying fluid ingress and temperatures up to 40°C. Its architectural build ensures reliable performance in subsurface drainage networks where reliable solids passage is required.

Hydraulic capacity is driven by a 17 kW motor on a 415v three-phase supply, achieving a maximum head of 43.2 m and a maximum flow of 4,500 L/min. The electrical system operates with a rated current of 33 Amps, maintaining torque and hydraulic stability throughout the service cycle. A star-delta starting method is utilized to minimize electrical peak loads during activation in drainage stations. Power is distributed effectively to support discharge requirements in municipal lift stations.

The Open S-Tube centrifugal impeller facilitates the movement of solids in suspension without internal clogging that compromises volumetric throughput. This configuration handles wastewater, maintaining efficiency throughout thousands of operating hours. By creating an s-tube flow within the pump housing, the design reduces internal wear and vibration for the rotating assembly. The impeller setup is intended for sewage transfer applications in municipal collection systems.

Mechanical construction features a heavy-duty cast iron pump housing and motor shell with an IP68 protection rating for depths up to 20 m. Longevity is anchored by a double mechanical shaft seal featuring silicon carbide faces and an oil bath for motor insulation. This model includes internal thermistors and moisture sensors to facilitate monitoring of the motor assembly. The casting includes DN 100 inlet and outlet connections for integration into standard wastewater infrastructure.

Features

• Open S-Tube impeller configuration facilitates the passage of large solids through the pump housing to maintain hydraulic throughput.
• Heavy-duty cast iron housing and motor shell provide the structural rigidity required for permanent submerged installations.
• Primary silicon carbide shaft seal and secondary carbon/silicon carbide seal in an oil bath protect the motor from liquid ingress.
• Internal thermistors and moisture sensors provide real-time monitoring to safeguard the electrical assembly against overheating.
• Maximum head performance of 43.2 m allows for wastewater discharge in high-elevation municipal applications.
• DN 100 inlet and DN 100 outlet ports are sized for standard connection to wastewater collection pits and infrastructure.
• IP68 enclosure rating ensures the motor remains protected during permanent immersion in wastewater environments.