{"product_id":"calpeda-4sdp-16-8-w-stainless-steel-4-inch-submersible-bore-pump-high-sand-boreholes","title":"Calpeda 4SDP 16\/8-W Stainless Steel 4\" Submersible Bore Pump for High Sand Boreholes with Floating Impellers","description":"\u003cp\u003eHigh-sand boreholes and civil applications requiring high-volume groundwater extraction from standard 4-inch borehole installations benefit from this submersible pump. It is specifically designed to handle clean liquids containing sand concentrations up to 300 g\/m³ and supports continuous duty for large-capacity tank filling.\u003c\/p\u003e\u003cp\u003eA 2.2 kW motor at 415V drives the 8-stage assembly, achieving a peak head of 39 meters and a maximum flow of 400 L\/Min. The mechanical interface conforms to NEMA standards, providing a secure connection point for high-performance 4-inch submersible motors.\u003c\/p\u003e\u003cp\u003eWithin the hydraulic section, LEXAN floating impellers move axially against polycarbonate diffusers, helping to prevent stage seizure when sand particles are present. Hydraulic performance remains stable during high-capacity transfer operations.\u003c\/p\u003e\u003cp\u003eAISI 304 stainless steel forms the external jacket, with a delivery casing incorporating a built-in non-return valve to protect the motor from reverse rotation and backflow during shutdown. Rated for immersion in liquids up to 35°C, the assembly features Class F motor insulation and a chrome-nickel steel suction lantern with a fine-mesh filter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSpecial radial floating impellers provide enhanced sand handling for borehole environments with high solid content\u003c\/li\u003e\n\u003cli\u003eReinforced polycarbonate diffusers reduce internal turbulence and improve hydraulic efficiency\u003c\/li\u003e\n\u003cli\u003eEight-stage radial hydraulic assembly delivers 39 meters of head for bulk water and commercial supply\u003c\/li\u003e\n\u003cli\u003eAISI 304 stainless steel external jacket provides structural integrity and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIntegrated non-return valve protects the system from backflow and reduces water hammer impact\u003c\/li\u003e\n\u003cli\u003eNEMA-standard coupling ensures compatibility with a wide range of submersible motor units\u003c\/li\u003e\n\u003cli\u003eChrome-nickel steel suction lantern and filter provide a barrier against mineral debris\u003c\/li\u003e\n\u003cli\u003eClass F insulation and IP68 protection support safe, reliable performance under continuous well immersion\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Calpeda","offers":[{"title":"Default Title","offer_id":50983322747127,"sku":"4SDP 16\/8-W","price":1181.84,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/calpeda-4sdp-16-8-w-stainless-steel-4-inch-submersible-bore-pump-high-sand-boreholes.png?v=1785325866","url":"https:\/\/foundationpumps.com.au\/products\/calpeda-4sdp-16-8-w-stainless-steel-4-inch-submersible-bore-pump-high-sand-boreholes","provider":"Foundation Pumps","version":"1.0","type":"link"}