Grundfos SE.150.200.4.52H.N.51D.A.T Cast Iron 4-Pole Sewage Pump for Wastewater Handling with Open S-Tube Impeller

Effective liquid management in large-scale municipal complexes depends on robust hydraulic units capable of handling high ingress rates in dry or submerged installations. The SE.150.200.4.52H.N.51D.A.T addresses environmental demands by providing a solution for effluent transfer and sewage pumping where fluid temperatures reach 40 degrees Celsius. Designed for deployment in drainage stations and collection pits, the assembly supports continuous service for infrastructure protection. The heavy-duty housing is intended for wastewater handling in subsurface civil works.

Hydraulic performance is provided by a 20 kW four-pole motor on a 415v three-phase supply, generating a maximum flow of 8340 L/Min and a maximum head of 32.7 m. Operating with a rated current of 41 Amps at 1478 rpm, the unit maintains consistent torque and hydraulic stability during high-load evacuation cycles. A star-delta starting method is utilized to optimize electrical consumption and manage start-up loads in deep-pit applications. Electrical distribution is established via a 15-metre power cable to facilitate deployment in subsurface networks.

Internal centrifugal design utilizes a high-efficiency Open S-Tube impeller to facilitate the passage of solids in suspension without internal contact. This configuration handles particles through the housing, preventing the internal clogging that could compromise volumetric efficiency over long-term service. By utilizing the Open S-Tube principle, the design reduces internal wear and vibration for the rotating assembly during high-volume discharge. The Open S-Tube setup is intended for high-volume wastewater transfer in municipal collection systems.

Mechanical integrity is reinforced by an IP68 protection rating and a double mechanical shaft seal arrangement featuring a primary silicon carbide seal and a secondary silicon carbide/carbon seal in an oil bath. Longevity is maintained by Class H insulation components and integrated thermistors for proactive monitoring of the 20 kW motor assembly. This model includes moisture sensors to facilitate early fault detection in submerged conditions. The architectural casting features a 344 kg net weight and DN 150 inlet and outlet connections for high-capacity integration into standardized wastewater infrastructure.

Features

• Open S-Tube impeller configuration facilitates high-efficiency liquid handling and prevents internal blockages in municipal networks.
• Heavy-duty cast iron housing and motor shell provide the structural durability needed for permanent installations up to 20 m deep.
• Double mechanical shaft seal featuring 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 enable real-time monitoring to safeguard the Class H insulated motor assembly.
• Four-pole motor operating at 1478 rpm provides the starting torque required for high-volume wastewater collection and transfer.
• DN 150 inlet and DN 150 outlet connections allow for high-capacity liquid transfer through standard pipework.
• Integral cooling jacket supports operational integrity in both dry and submerged installation environments.