Grundfos SE.150.220.4.52H.N.51D.A.T Cast Iron 4-Pole Sewage Pump for Municipal Sewage with Open S-Tube Impeller

Operational efficiency in large-scale municipal drainage networks is maintained by high-performance hydraulic units designed for continuous service in dry or submerged installations. The SE.150.220.4.52H.N.51D.A.T provides the starting torque and discharge capacity necessary for high-volume effluent transfer. Operating at temperatures up to 40 degrees Celsius, the system ensures stable circulation in drainage transfer stations. This four-pole unit is intended for sewage collection where reliable solids passage and infrastructure protection are required.

Hydraulic performance is driven by a 22 kW four-pole motor on a 415v three-phase supply, generating a maximum flow of 8640 L/Min and a maximum head of 33.3 m. Operating with a rated current of 43 Amps at 1476 rpm, the unit maintains consistent torque and hydraulic stability during high-load duty cycles. A star-delta starting method is utilized to optimize electrical consumption and manage start-up loads in deep-pit applications. Power is distributed through a 15-metre power cable to support integration into large-scale wastewater infrastructure.

Internal fluid velocity paths utilize an Open S-Tube centrifugal impeller designed for the passage of solids in suspension without internal clogging. This configuration handles particles through the housing, maintaining volumetric efficiency throughout prolonged service in municipal environments. By utilizing a high-efficiency hydraulic profile, the unit minimizes friction and vibration to protect the rotating assembly during high-volume discharge. The Open S-Tube design is intended for high-capacity liquid handling where reliable flow behavior is required.

Mechanical construction features a heavy-duty cast iron body 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 in an oil bath for motor insulation. This model includes integrated thermistors and moisture sensors to facilitate monitoring of the Class H insulation motor assembly. The architectural casting features a 347 kg net weight and DN 150 ports for integration into standardized wastewater infrastructure.

Features

• Open S-Tube impeller configuration facilitates the passage of solids through the pump housing to maintain hydraulic throughput.
• Heavy-duty cast iron housing and motor shell provide the structural rigidity required for permanent 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.
• IP68 protection rating confirms the unit is suitable for continuous duty in submerged environments up to 20 m deep.
• Integrated thermistors and moisture sensors provide real-time monitoring to safeguard the Class H insulated motor assembly.
• Four-pole motor configuration operating at 1476 rpm provides the torque required for processing high-volume wastewater collection.
• DN 150 inlet and DN 150 outlet connections are sized for high-capacity liquid transfer through standard plumbing networks.
• Integral cooling jacket supports operational integrity in both dry and submerged installation environments.