Grundfos SE.100.200.4.52H.N.51D.A.T Cast Iron 4-Pole Sewage Pump for Municipal Sewage with Open S-Tube Impeller

Managing high-volume fluid optimization in deep municipal collection pits requires structural foundations capable of handling continuous liquid ingress in dry or submerged installations. The SE.100.200.4.52H.N.51D.A.T pump provides high-capacity wastewater transfer for effluent management where fluid temperatures reach 40 degrees Celsius. Maintaining hydraulic integrity during permanent installation is necessary for drainage stations and sewage collection duties. Subsurface civil works rely on this assembly for infrastructure protection across varying liquid levels.

Hydraulic capacity is driven by a 20 kW four-pole motor on a 415v three-phase supply, generating a maximum flow of 8340 L/Min and a maximum head of 32.7 m. Operating with a rated current of 41 Amps at 1478 rpm, the unit maintains consistent torque and hydraulic stability during high-load evacuation. A star-delta starting method is utilized to manage peak electrical loads and ensure torque stability during initial activation cycles. Power is distributed effectively to support discharge requirements.

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 internal contact that could compromise volumetric throughput during prolonged service. By utilizing the Open S-Tube principle, the unit minimizes friction and vibration to protect the rotating assembly during high-volume discharge. The hydraulic configuration is intended for wastewater transfer where reliable flow behavior is necessary.

Mechanical construction utilizes heavy-duty cast iron for the pump housing and motor shell with an IP68 protection rating for depths up to 20 m. Motor protection is provided by internal thermistors and moisture sensors that facilitate monitoring of the Class H insulation motor assembly. The shaft sealing system utilizes a primary silicon carbide seal and a secondary silicon carbide/carbon seal in an oil bath for maximum durability. Featuring DN 150 inlet and DN 100 outlet connections, the structure supports integration into standardized municipal plumbing networks.

Features

• Open S-Tube impeller design enables the passage of solids through the pump housing without compromising volumetric hydraulic throughput.
• Cast iron pump housing and motor shell provide a rigid structural foundation for permanent installations up to 20 m deep.
• Double mechanical shaft seal featuring silicon carbide faces in an oil bath ensures the motor remains shielded from liquid ingress.
• Internal thermistor and moisture sensors provide real-time monitoring to safeguard the Class H insulation motor against overheating.
• High-efficiency 20 kW motor utilizes a star-delta starting method to manage peak electrical loads during high-volume activation.
• Four-pole motor configuration operating at 1478 rpm provides the torque required for processing high-volume municipal wastewater.
• Standardized DN 150 inlet and DN 100 outlet connections allow for high-capacity liquid transfer through standard pipework.
• Integral cooling jacket supports operational integrity in both dry and submerged installation environments.