{"product_id":"calpeda-4sdp-2-20-w-stainless-steel-4-inch-submersible-bore-pump-industrial-water-supply","title":"Calpeda 4SDP 2\/20-W Stainless Steel 4\" Submersible Bore Pump for Industrial Water Supply with Floating Impellers","description":"\u003cp\u003eRural supply and industrial processes requiring significant lift heights are the primary applications for this submersible pump from 4-inch borehole sources. It handles clean liquids with sand concentrations up to 150 g\/m³ and supports continuous duty for high-demand pressurised networks.\u003c\/p\u003e\u003cp\u003eA 1.1 kW three-phase motor at 415V drives the 20-stage assembly, achieving a maximum head of 131 meters and a peak flow of 50 L\/Min. The mechanical interface conforms to NEMA standards, providing a secure connection to high-performance submersible borehole motors.\u003c\/p\u003e\u003cp\u003eHigh-strength LEXAN floating impellers move axially to allow sand passage, helping to protect polycarbonate diffusers from abrasive wear. This configuration maintains consistent flow rates in applications where subterranean sediment is a factor.\u003c\/p\u003e\u003cp\u003eAISI 304 stainless steel forms the external jacket, with a delivery casing incorporating a built-in non-return valve to prevent water column drainage and motor reverse rotation during shutdown. Rated for water up to 35°C, the assembly includes a chrome-nickel steel suction lantern and a Class F insulated motor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLEXAN radial floating impellers are designed to handle sand particles while preventing internal wear and seizure\u003c\/li\u003e\n\u003cli\u003eReinforced polycarbonate diffusers reduce turbulence and improve overall hydraulic efficiency\u003c\/li\u003e\n\u003cli\u003eTwenty-stage hydraulic configuration delivers 131 meters of head for high-lift rural water supply projects\u003c\/li\u003e\n\u003cli\u003eAISI 304 stainless steel external jacket provides resistance to borehole oxidation and chemical groundwater attack\u003c\/li\u003e\n\u003cli\u003eBuilt-in non-return valve protects the internal hydraulics from back-pressure and column weight stress\u003c\/li\u003e\n\u003cli\u003eNEMA-standard coupling simplifies installation and ensures compatibility with various submersible borehole motors\u003c\/li\u003e\n\u003cli\u003eChrome-nickel steel suction lantern prevents oversized debris from entering and damaging the internal stages\u003c\/li\u003e\n\u003cli\u003eClass F insulation and IP68 protection support continuous duty in deep, fully submerged boreholes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Calpeda","offers":[{"title":"Default Title","offer_id":50983319830775,"sku":"4SDP 2\/20-W","price":1265.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/calpeda-4sdp-2-20-w-stainless-steel-4-inch-submersible-bore-pump-industrial-water-supply.png?v=1785325810","url":"https:\/\/foundationpumps.com.au\/products\/calpeda-4sdp-2-20-w-stainless-steel-4-inch-submersible-bore-pump-industrial-water-supply","provider":"Foundation Pumps","version":"1.0","type":"link"}