{"product_id":"grundfos-sl-56l-280-6-50d-300-cast-iron-low-head-drainage-pump-open-s-tube-impeller","title":"Grundfos SL.56L.280.6.50D.300 Cast Iron Low-Head Drainage Pump with Open S-Tube Impeller","description":"\u003cp\u003eEngineered 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.\u003c\/p\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eConstruction 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.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOpen S-tube impeller design with 411.2 mm actual diameter for handling untreated wastewater containing solids.\u003c\/li\u003e\n\u003cli\u003eCast iron EN-GJL-250 pump housing and motor casing for durability in permanent submerged drainage service.\u003c\/li\u003e\n\u003cli\u003eDouble mechanical shaft seal arrangement with SiC\/SiC primary seal and Silicon Carbide\/Carbon secondary seal.\u003c\/li\u003e\n\u003cli\u003eIntegrated PTO sensors for motor protection and monitoring to ensure operational safety and stator longevity.\u003c\/li\u003e\n\u003cli\u003eSupplied with a 10-metre S1BC4N8-F EMC power cable for reliable electrical connection in drainage basins.\u003c\/li\u003e\n\u003cli\u003eIP68 enclosure suitable for installation depths up to 30 metres and 5 bar maximum operating pressure.\u003c\/li\u003e\n\u003cli\u003eClass H motor insulation with support for up to 30 starts per hour during continuous S1 duty cycles.\u003c\/li\u003e\n\u003cli\u003eDN 300 inlet and outlet connections optimized for high-volume wastewater transfer and flood control.\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":50901325349111,"sku":"92850529","price":43314.81,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-sl-56l-280-6-50d-300-cast-iron-low-head-drainage-pump-open-s-tube-impeller.png?v=1782731464","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-sl-56l-280-6-50d-300-cast-iron-low-head-drainage-pump-open-s-tube-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}