Grundfos SL.100.130.2.52S.N.51D.A.T Cast Iron 2-Pole Sewage Pump for Wastewater with Open S-Tube Impeller

High-volume wastewater management in municipal collection pits requires subsurface infrastructure capable of handling significant environmental demands. The Grundfos SL.100.130.2.52S.N.51D.A.T establishes reliable liquid transfer for wastewater transfer applications where fluid temperatures range between -10 and 40°C. Maintaining structural integrity during permanent immersion is necessary for drainage stations and collection network duties. This unit supports continuous service in gravity drainage networks prone to varying liquid levels.

Hydraulic capacity is driven by a 13 kW motor operating on a 415v three-phase supply with a rated current of 26 Amps. This configuration generates a maximum flow of 4,014 L/min and achieves a maximum head of 35.6 m. The motor utilizes a star-delta starting method to manage peak electrical loads and ensure circulation stability during initial activation cycles. Consistent pressure behavior satisfies the requirements of municipal lift stations and collection network infrastructure.

Internal fluid velocity paths feature an Open S-Tube impeller designed for the free passage of solids in suspension. This centrifugal configuration facilitates the movement of contaminated liquids without 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. The Open S-Tube setup is intended for wastewater transfer where reliable solids handling is required.

Mechanical construction utilizes a heavy-duty cast iron housing and motor shell with an IP68 protection rating for depths up to 20 m. Longevity is anchored by a silicon carbide primary shaft seal and a silicon carbide/carbon secondary seal in an oil bath for motor insulation. This model includes integrated thermistors and moisture sensors to facilitate proactive monitoring of the motor assembly. The casting includes a DN 100 inlet and DN 100 outlet for integration into standard wastewater collection infrastructure.

Features

• Open S-Tube impeller configuration facilitates high-efficiency solids handling and prevents internal blockages in wastewater collection.
• Heavy-duty cast iron pump housing and motor shell provide the structural durability needed for permanent submerged installations.
• Double mechanical shaft seal with silicon carbide faces in an oil bath ensures protection for the motor assembly.
• IP68 enclosure rating confirms the system 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 electrical assembly against overheating.
• DN 100 inlet and DN 100 outlet connections allow for seamless integration into standard municipal plumbing networks.
• Two-pole motor operating at 2,973 rpm provides the high-velocity discharge required for pressurized sewage mains.