{"product_id":"grundfos-nb-65-125-125-cast-iron-5-5-kw-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 65-125\/125 Cast Iron 5.5 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eThe NB 65-125\/125 single-stage end-suction pump operates on a 415 V three-phase supply rated at 5.5 kW drive power. Built with an axial inlet port (DN 80) and top radial outlet port (DN 65), the unit connects into commercial hydronic heating networks, cooling tower water loops, and facility fluid transfer lines.\u003c\/p\u003e\u003cp\u003eUnder full duty load, the pump generates 1658 L\/Min rated flow capacity and reaches a maximum head threshold of 14.85 m. The heavy volute housing uses electrocoated cast iron to resist internal corrosion. A stainless steel impeller rotor assembly with bronze wear rings drives fluid transfer. Net product weight equals 107 kg.\u003c\/p\u003e\u003cp\u003eDrive power on the NB 65-125\/125 pump comes from a 5.5 kW electric motor operating on a 415 V three-phase electrical connection. Full-load running current measures 10.5 Amps. The pump processes liquid media over temperatures from -25°C to 120°C under line pressures up to 16 bar. Pipe connections use DN 80 suction and DN 65 discharge flanges.\u003c\/p\u003e\u003cp\u003eBuilt with an IP55 rated motor enclosure and Class F insulation, the NB 65-125\/125 electric motor incorporates internal PTC thermistor sensors against overheating. Servicing is simplified by the back-pull-out structural layout, enabling complete rotor and drive removal without disconnecting suction or discharge pipe joints.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eATEX Zone 1, 2, 21 or 22 certification available for operation in potentially explosive atmospheres (except E-model variants).\u003c\/li\u003e\n\u003cli\u003eIntegrally cast suction and discharge ports with dedicated vent and drain ports provide direct connection points without additional fittings.\u003c\/li\u003e\n\u003cli\u003eNo baseplate or grouting required to maintain correct shaft alignment and vibration levels within Hydraulic Institute standards.\u003c\/li\u003e\n\u003cli\u003eCataphoretic electrocoating on cast iron internal surfaces provides barrier protection against oxidative corrosion in hydronic circulation loops.\u003c\/li\u003e\n\u003cli\u003eClose-coupled configuration eliminates coupling alignment procedures and reduces overall installation footprint compared to long-coupled alternatives.\u003c\/li\u003e\n\u003cli\u003eBall bearing support arrangement accommodates both radial and axial thrust loads generated during continuous duty operation at rated speed.\u003c\/li\u003e\n\u003cli\u003ePN16 flanged connection ratings on sizes up to and including DN 150 provide elevated working pressure capability beyond standard EN733 10 bar ratings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003eBulk freight charges apply. Please contact us for a freight quote before ordering.\u003c\/p\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":51148680200439,"sku":"93209326","price":5325.76,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-65-125-125-cast-iron-5-5-kw-end-suction-centrifugal-pump-with-closed-impeller.png?v=1789124298","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-65-125-125-cast-iron-5-5-kw-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}