Grundfos SL.150.150.4.52H.N.51D.A.T Cast Iron 4-Pole Sewage Pump for Effluent Transfer with Open S-Tube Impeller

Environmental demands in large-scale municipal complexes require specialized hydraulic solutions for efficient effluent management and wastewater collection. The Grundfos SL.150.150.4.52H.N.51D.A.T handles contaminated liquids in subsurface pits where reliable solids passage is required for system maintenance. This four-pole submersible pump maintains stable performance at temperatures up to 40°C in drainage stations and municipal lift stations. Maintaining operational flow behavior in permanent submerged installations is essential for infrastructure protection and transfer duties.

Hydraulic capacity is provided by a 15 kW motor operating on a 415v three-phase supply with a rated current of 30 Amps. This assembly generates a maximum flow of 7,500 L/min and achieves a maximum head of 26.3 m for high-volume wastewater transfer. The motor operates at 1,480 rpm, ensuring consistent pressure behavior and circulation characteristics during high-load evacuation cycles. Power is distributed through a 15-metre power cable to support integration into gravity drainage networks and pump stations.

Internal centrifugal design utilizes a high-efficiency Open S-Tube impeller to facilitate the passage of solids in suspension. This configuration handles wastewater, maintaining volumetric efficiency throughout thousands of operating hours in municipal environments. By utilizing the s-tube principle, the unit minimizes internal friction and vibration to protect the rotating assembly during high-volume discharge. The impeller setup is intended for effluent transfer in municipal and industrial collection systems.

Mechanical construction features a heavy-duty cast iron housing and motor shell with an IP68 protection rating for immersion up to 20 m. Motor protection is provided by internal thermistors and moisture sensors that facilitate monitoring of the motor assembly. The shaft sealing system utilizes a primary silicon carbide seal and a secondary seal in an oil bath for maximum durability. Featuring DN 150 connections and a 315 kg net weight, the structure supports high-capacity integration into standard plumbing networks.

Features

• Open S-Tube impeller design enables the passage of solids through the pump casing without compromising volumetric hydraulic throughput.
• Heavy-duty cast iron housing and motor shell provide a rigid structural foundation for permanent submerged installations.
• Double mechanical shaft seal featuring silicon carbide faces in an oil bath ensures the motor remains shielded from liquid ingress.
• Internal thermistors and moisture sensors provide real-time monitoring to safeguard the motor against overheating.
• High-efficiency 15 kW motor utilizes a star-delta starting method to manage peak electrical loads during high-volume activation.
• DN 150 inlet and DN 150 outlet connections allow for high-capacity liquid transfer through standard industrial pipework.
• Four-pole motor configuration operating at 1,480 rpm provides the hydraulic torque needed for processing high-volume wastewater.