Grundfos SL.100.265.2.52S.N.51D.A.T Cast Iron 2-Pole Sewage Pump for Industrial Wastewater with Open S-Tube Impeller

Industrial wastewater handling requires the robust performance of the Grundfos SL.100.265.2.52S.N.51D.A.T. This cast iron submersible pump uses an Open S-Tube impeller, draws 53 Amps from a 26.5 kW 415V motor, and delivers 5,466 L/min flow at 60.5 m head for heavy-duty transfer. The two-pole configuration operating at 2,967 rpm ensures consistent hydraulic performance in demanding collection networks. The system is designed for permanent submerged installation in collection pits with temperatures from -10 to 40°C.

Hydraulic performance is driven by a 26.5 kW motor on a 415v three-phase supply with a rated current of 53 Amps. This assembly generates a maximum flow of 5,466 L/min and achieves a maximum head of 60.5 m for high-volume transfer applications. The motor utilizes a star-delta starting method to manage peak electrical loads and ensure circulation stability during initial activation cycles. Rapid evacuation is achieved through the DN 100 discharge port to protect infrastructure in gravity drainage networks.

Internal fluid 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 during wastewater transfer. The Open S-Tube design prevents clogging in industrial wastewater handling applications.

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 DN 100 inlet and outlet connections for integration into standard wastewater collection infrastructure.

Features

• Open S-Tube impeller configuration facilitates high-efficiency solids handling and prevents internal blockages in high-volume networks.
• 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 26.5 kW motor.
• 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 2,967 rpm provides the high-velocity discharge required for industrial wastewater transfer.