Grundfos SE1.85.100.100.4.52H.N.51D.A.T Cast Iron Sewage Pump for Civil Drainage with S-Tube Impeller

Stormwater drainage and wastewater collection in municipal environments require high-performance hydraulic assets built for high flow rates in permanent submerged environments. The Grundfos SE1.85.100.100.4.52H.N.51D.A.T Submersible Wastewater Pump ensures circulation stability for surface water and contaminated liquid management where fluid temperatures reach 40°C. Maintaining structural integrity during continuous duty is essential for facility maintenance and municipal infrastructure protection. This assembly is intended for stormwater discharge and effluent transfer in civil networks.

Hydraulic capacity is driven by a 10 kW four-pole motor operating on a 415v three-phase supply with a rated current of 21 Amps. This configuration generates a maximum flow of 4986 L/min and achieves a maximum head of 19 m to satisfy requirements in gravity drainage systems. The motor operates at 1482 rpm and utilizes a star-delta starting method to manage peak electrical loads during initial activation. Power is distributed through a 15-metre power cable to facilitate deployment in deep subsurface wastewater handling pits and collection stations.

Internal fluid paths utilize a high-efficiency S-TUBE impeller to enable the passage of solids up to 85 mm without internal contact. This specialized hydraulic configuration provides high clog resistance and ensures reliable wastewater transfer during intensive service in municipal networks. By optimizing internal fluid pathways, the unit maintains volumetric throughput throughout thousands of service hours in submerged pits. The S-TUBE impeller is specifically engineered for high-volume liquid handling where durability is critical for system reliability in civil works.

Mechanical construction features a heavy-duty cast iron body and motor shell with an IP68 protection rating for depths up to 20 m. Longevity is anchored by a double mechanical shaft seal featuring silicon carbide faces in an oil bath for motor protection. This model includes integrated thermistors and moisture sensors for proactive monitoring of the Class H insulated motor assembly. The architectural casting features a DN 150 inlet and DN 100 outlet port for high-capacity integration into standardized municipal wastewater infrastructure.

Features

• Cast iron S-TUBE impeller provides efficient solids handling up to 85 mm and reduces the risk of internal blockages.
• Heavy-duty cast iron housing and motor shell ensure structural durability for submerged duty up to 20 m deep.
• Double mechanical shaft seal with silicon carbide faces ensures the 10 kW motor remains shielded from liquid ingress.
• Integrated thermistors and moisture sensors facilitate monitoring of the Class H insulated motor assembly.
• Four-pole motor operating at 1482 rpm provides the starting torque required for high-volume stormwater collection.
• DN 150 inlet and DN 100 outlet ports allow for high-capacity liquid transfer through municipal plumbing.
• Built-in cooling jacket enables reliable performance in both dry and submerged installation environments.