{"product_id":"grundfos-nb-50-250-222-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 50-250\/222 Cast Iron 18.5 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eSpecified for commercial building services, process water loops, and district cooling infrastructure, the NB 50-250\/222 end-suction centrifugal pump incorporates DN 65 suction and DN 50 discharge flanged ports. The end-suction volute design connects directly to suction line headers and concrete foundation bases.\u003c\/p\u003e\u003cp\u003eAt nominal operational speed, hydraulic output provides 1220 L\/Min flow throughput alongside a maximum head limit of 57.75 m. Structural construction incorporates an EN-GJL-250 cast iron body with cataphoresis surface finish. Internal components feature a stainless steel impeller and BQQE seal. Total net weight stands at 179 kg.\u003c\/p\u003e\u003cp\u003eThe NB 50-250\/222 electric motor operates on a 415 V three-phase supply drawing 35.3 Amps rated current at 18.5 kW output power. Fluid handling parameters accommodate liquid temperatures between -25°C to 120°C up to 16 bar system pressure. Line connection uses opposite DN 65 inlet and DN 50 outlet flanged ports.\u003c\/p\u003e\u003cp\u003eEnclosure protection on the NB 50-250\/222 model meets IP55 standards while motor windings feature Class F insulation and PTC thermistor protection relays. Maintenance technicians can extract the drive unit using back-pull-out access without removing the cast iron volute casing from connected plant room piping manifolds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\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\u003cli\u003eHigh-efficiency motor selection is configured to match the specific power supply characteristics, pumping environment and liquid properties of each installation.\u003c\/li\u003e\n\u003cli\u003eBack pull-out design allows complete rotating assembly removal including motor, coupling and impeller without disturbing pump housing or connected pipework.\u003c\/li\u003e\n\u003cli\u003eEN733 and ISO2858 dimensional compliance ensures interchangeability with other standard end-suction pumps across commercial and industrial installations.\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":51148679643383,"sku":"93209318","price":9483.71,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-50-250-222-cast-iron-end-suction-centrifugal-pump-with-closed-impeller.png?v=1789124291","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-50-250-222-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}