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SKU: 92850529
Grundfos SL.56L.280.6.50D.300 Cast Iron Low-Head Drainage Pump with Open S-Tube Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Engineered for high-volume transfer in civil infrastructure, the Grundfos SL.56L.280.6.50D.300 is intended for permanent submerged installation in groundwater drainage and flood control systems. Holding CE EN12050-1 approval, this cast iron model is built for use in wet wells and basins handling untreated wastewater containing solids.
The pump is powered by a 28 kW 6-pole motor operating at 990 rpm on a 3 x 415 V supply with a rated current of 59.5 Amps. It achieves a maximum head up to 20 m and a maximum flow up to 25380 L/min. The motor is rated for continuous S1 submerged duty in untreated wastewater at temperatures ranging from 0°C to 40°C.
The hydraulic system uses an Open S-tube impeller with a 411.2 mm actual diameter to manage untreated wastewater. The nominal duty head is 10.46 m. The hydraulic design features dual DN 300 connections with DIN flange standards, supporting high-volume wastewater transfer while reducing the risk of clogging in municipal networks.
Construction features an EN-GJL-250 cast iron pump housing and motor casing with double mechanical shaft seals. Protection is provided by integrated PTO sensors for motor protection and monitoring. The unit is supplied with a 10-metre S1BC4N8-F EMC power cable and an IP68 enclosure suitable for installation depths up to 30 metres.
FEATURES
- Open S-tube impeller design with 411.2 mm actual diameter for handling untreated wastewater containing solids.
- Cast iron EN-GJL-250 pump housing and motor casing for durability in permanent submerged drainage service.
- Double mechanical shaft seal arrangement with SiC/SiC primary seal and Silicon Carbide/Carbon secondary seal.
- Integrated PTO sensors for motor protection and monitoring to ensure operational safety and stator longevity.
- Supplied with a 10-metre S1BC4N8-F EMC power cable for reliable electrical connection in drainage basins.
- IP68 enclosure suitable for installation depths up to 30 metres and 5 bar maximum operating pressure.
- Class H motor insulation with support for up to 30 starts per hour during continuous S1 duty cycles.
- DN 300 inlet and outlet connections optimized for high-volume wastewater transfer and flood control.
SPECIFICATIONS
| Max Flow | 25380 L/Min |
| Max Head | 20 m |
| Power | 28 kW / 415v |
| Rated Current | 59.5 Amps |
| Suitable For | Groundwater Drainage |
| Body Material | Cast iron |
| Liquid Temperature | Maximum 40°C |
| Inlet Size | 300 mm |
| Outlet Size | 300 mm |
| Warranty | 24 Months |
Warranty & Returns
All products supplied by Foundation Pumps are covered by a minimum 12-month warranty unless otherwise stated. Some brands may offer longer manufacturer warranties. Warranty covers manufacturing defects, faulty materials and workmanship under normal use.
- Products must be installed correctly and in accordance with the manufacturer’s instructions.
- Warranty does not cover incorrect installation, misuse, dry running, normal wear and tear, unauthorised repairs or damage caused by external factors.
- Proof of purchase, photos, videos and installation details may be requested when assessing a warranty claim.
- The customer is responsible for returning the product to Foundation Pumps or the nominated service centre unless otherwise agreed.
- Removal, reinstallation, labour and associated site costs are generally the customer’s responsibility unless required under Australian Consumer Law.
- Change-of-mind returns may be accepted within 30 days provided the product is unused, uninstalled and returned in its original packaging.
- Customers are responsible for return freight costs for change-of-mind returns.
- Restocking fees may apply to special-order, bulky or non-stocked products.
- Used, installed or specially ordered products may not be eligible for change-of-mind returns.
- If a product arrives damaged or faulty, please contact Foundation Pumps as soon as possible so we can assist with the appropriate repair, replacement or refund.
Your rights under Australian Consumer Law are not affected.
What voltage supply and motor power does this pump need?
Powered by a dedicated 28 kW motor, the Grundfos SL.56L.280.6.50D.300 connects to 415 V three-phase mains power with a rated current draw of 59.5 Amps.
What primary fluid transfer and circulation roles are designated for this pump?
Everyday water management duties for the SL.56L.280.6.50D.300 focus on Dependable flood drainage is supported in through an expansive 105 mm free solids passage clearance across the volute, providing reliable pumping performance.
What connection layout and port dimensions are featured on this unit?
Connecting via a standard auto-coupling, the SL-56L-280-6-50D-300 aligns cleanly with system plumbing headers.
How much fluid throughput does this pump move under full load?
Peak fluid displacement on the SL 56L 280 6 50D 300 delivers up to 25380 L/Min under rated operating conditions.
What peak dynamic elevation does this pump develop?
Fluid elevation through vertical risers reaches up to 20 m with the SL/56L/280/6/50D/300 under standard duty points.
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