Grundfos SL.150.130.4.52H.N.51D.A.T Cast Iron 4-Pole Sewage Pump for Wastewater Transfer with Open S-Tube Impeller

Reliable wastewater transfer within municipal drainage networks requires hydraulic equipment capable of handling contaminated liquids and suspended solids under continuous operating conditions. The Grundfos SL.150.130.4.52H.N.51D.A.T is engineered for use in collection pits where dependable solids passage is essential for uninterrupted service. The system maintains stable performance in permanent submerged installations handling liquid temperatures up to 40°C. Consistent hydraulic operation in deep subsurface environments supports drainage transfer duties and the ongoing performance of municipal infrastructure.

Hydraulic capacity is provided by a 13 kW four-pole motor on a 415v three-phase supply, generating a maximum flow of 6,960 L/min and a maximum head of 24.7 m. Operating with a rated current of 26 Amps at 1,483 rpm, the unit maintains consistent torque and hydraulic stability during continuous duty 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 wastewater handling networks.

Internal fluid velocity paths feature a high-efficiency Open S-Tube impeller designed for the movement of solids in suspension without internal clogging. This centrifugal setup facilitates the free passage of particles through the housing, preventing the contact that could compromise volumetric throughput during prolonged service. By utilizing the s-tube principle, the unit minimizes internal wear and vibration for the rotating assembly during high-volume discharge. The hydraulic configuration is intended for wastewater transfer in municipal collection systems.

Mechanical integrity is reinforced by a cast iron pump body and motor shell with an IP68 protection rating for depths up to 20 m. Longevity is anchored by a motor assembly shielded by a double mechanical shaft seal arrangement in an oil bath for maximum insulation. This model features integrated moisture sensors and thermistors for proactive monitoring and early fault detection in submerged conditions. The casting includes a 315 kg net weight and DN 150 connections for high-capacity integration into standardized wastewater infrastructure.

Features

• Open S-Tube impeller configuration facilitates high-efficiency solids handling and prevents internal blockages in high-volume municipal networks.
• Heavy-duty cast iron housing and motor shell offer the structural durability needed for deep pit wastewater site installations.
• Double mechanical shaft seal with silicon carbide faces in an oil bath ensures protection for the 13 kW motor.
• IP68 protection rating allows for permanent immersion in sewage collection pits at installation depths up to 20 metres.
• Four-pole motor operating at 1,483 rpm provides the starting torque required for high-volume sewage collection and transfer.
• DN 150 inlet and DN 150 outlet connections are sized for high-capacity liquid transfer through standard municipal pipework.
• Integrated thermistors and moisture sensors enable real-time monitoring to safeguard the electrical assembly from thermal overload.