Grundfos SE.100.185.2.52S.N.51D.A.T Cast Iron 2-Pole Sewage Pump for Lift Stations with Open S-Tube Impeller

Operational load scaling in municipal lift stations requires specialized hydraulic solutions built for continuous submerged service in collection pits. The Grundfos SE.100.185.2.52S.N.51D.A.T addresses environmental demands by providing a solution for high-volume effluent transfer where fluid temperatures reach 40 degrees Celsius. Designed for permanent submerged installation, the system maintains stable performance in drainage stations prone to varying liquid levels. This cast iron unit supports infrastructure protection across intensive duty cycles in civil drainage networks.

Hydraulic performance is provided by an 18.5 kW two-pole motor on a 415v three-phase supply, generating a maximum flow of 4686 L/Min and a maximum head of 46 m. Operating with a rated current of 36 Amps, the unit maintains consistent torque and hydraulic stability throughout the service cycle. 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 wastewater handling networks.

The centrifugal configuration utilizes a high-efficiency Open S-Tube impeller designed for the movement of solids in suspension without internal clogging. This setup facilitates the free passage of particles through the housing, preventing the contact that could compromise volumetric throughput during prolonged service. By utilizing the Open S-Tube principle, the unit minimizes internal wear and vibration to protect the rotating assembly during high-head discharge. The hydraulic configuration is intended for high-capacity liquid handling where reliable flow behavior is necessary.

Mechanical integrity is anchored by an IP68 protection rating and a double mechanical shaft seal arrangement incorporating silicon carbide primary faces and a secondary silicon carbide/carbon seal. Longevity is maintained by Class H insulation components and an oil bath for maximum durability. This model includes integrated moisture sensors and thermistors to facilitate monitoring of the electrical assembly in submerged conditions. The architectural casting includes a 305 kg net weight and DN 100 ports for integration into standardized wastewater infrastructure.

Features

• Open S-Tube impeller configuration enables the passage of solids through the pump casing without compromising hydraulic throughput.
• Cast iron pump housing and motor shell provide a rigid structural foundation for submerged installations up to 20 m deep.
• Double mechanical shaft seal with silicon carbide faces in an oil bath ensures protection for the Class H insulated motor.
• Internal thermistors and moisture sensors provide real-time monitoring to safeguard the 18.5 kW motor assembly.
• Two-pole motor operating at 2964 rpm provides the high-velocity discharge required for wastewater mains.
• Standardized DN 100 inlet and DN 100 outlet connections allow for high-capacity liquid transfer through standard pipework.
• IP68 enclosure rating confirms the system is suitable for permanent immersion in subsurface collection pits.
• Integral cooling jacket supports operational integrity in both dry and submerged installation environments.