{"product_id":"grundfos-nb-40-315-273-cast-iron-22-kw-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 40-315\/273 Cast Iron 22 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eThe NB 40-315\/273 single-stage end-suction pump operates on a 415 V three-phase supply rated at 22 kW drive power. Built with an axial inlet port (DN 65) and top radial outlet port (DN 40), 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 593 L\/Min rated flow capacity and reaches a maximum head threshold of 81.64 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 260 kg.\u003c\/p\u003e\u003cp\u003eDrive power on the NB 40-315\/273 pump comes from a 22 kW electric motor operating on a 415 V three-phase electrical connection. Full-load running current measures 40.8 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 65 suction and DN 40 discharge flanges.\u003c\/p\u003e\u003cp\u003eBuilt with an IP55 rated motor enclosure and Class F insulation, the NB 40-315\/273 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\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\u003cli\u003eO-ring seal between pump housing and cover eliminates leakage risk at the volute-to-cover joint under sustained operating pressures.\u003c\/li\u003e\n\u003cli\u003eOptimised impeller and volute hydraulics deliver unimpeded liquid flow through the pump casing, reducing internal turbulence losses.\u003c\/li\u003e\n\u003cli\u003eAll stainless steel shaft construction provides improved corrosion resistance compared to carbon steel alternatives in wetted service areas.\u003c\/li\u003e\n\u003cli\u003eMechanical shaft seal can be replaced without removing the impeller, system piping, pump volute casing or drive motor from the installation.\u003c\/li\u003e\n\u003cli\u003eHousing, impeller and wear ring use dissimilar material pairings to prevent galling and ensure no sticking elements during extended standby periods.\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":51148677284087,"sku":"93209283","price":12111.06,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-40-315-273-cast-iron-22-kw-end-suction-centrifugal-pump-with-closed-impeller.png?v=1789124260","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-40-315-273-cast-iron-22-kw-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}