Grundfos SL.150.170.4.52H.N.51D.A.T Cast Iron 4-Pole Sewage Pump for Sewage Handling with Open S-Tube Impeller

Cast iron housing and motor shell construction provide the structural foundation for the Grundfos SL.150.170.4.52H.N.51D.A.T submersible pump. This heavy-duty unit addresses the requirements of municipal networks and sewage collection systems where contaminated wastewater is present. The system handles liquids with temperatures up to 40°C in both subsurface collection pits and transfer environments. Reliable wastewater transfer and circulation stability are maintained by this assembly in deep-pit drainage stations and municipal lift stations.

Hydraulic performance is provided by a 17 kW motor on a 415v three-phase supply, generating a maximum flow of 7,800 L/min and a maximum head of 27.4 m. Operating with a rated current of 37 Amps at 1,480 rpm, the unit maintains consistent torque and circulation stability during high-load duty cycles. A star-delta starting method is utilized to optimize electrical consumption and manage start-up loads in subsurface applications. Power is distributed through a 15-metre power cable to facilitate deployment in large-scale wastewater infrastructure.

Internal centrifugal design utilizes a high-efficiency Open S-Tube impeller to facilitate the passage of solids in suspension. This configuration handles particles through the housing, preventing 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. The Open S-Tube setup is intended for wastewater transfer where reliable solids handling is required.

Mechanical integrity is reinforced by a cast iron pump 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 and an oil bath for motor insulation. This model includes integrated moisture sensors and thermistors to facilitate operational monitoring of the motor assembly. The architectural casting features a DN 150 inlet and DN 150 outlet for high-capacity integration into standardized wastewater collection systems.

Features

• Open S-Tube impeller design enables the passage of solids through the pump casing without compromising volumetric hydraulic throughput.
• Heavy-duty cast iron construction of the housing and motor shell provides the structural durability needed for deep pit installations.
• Double mechanical shaft seal in an oil bath with silicon carbide faces ensures the motor remains shielded from liquid ingress.
• IP68 protection rating confirms the system is suitable for continuous duty in submerged environments up to 20 metres deep.
• Integrated thermistors and moisture sensors enable real-time monitoring to protect the electrical assembly.
• DN 150 inlet and DN 150 outlet connections allow for high-capacity liquid transfer through standard municipal plumbing.
• Four-pole motor operating at 1,480 rpm provides the starting torque required for high-volume sewage collection systems.