{"product_id":"grundfos-nb-50-250-205-cast-iron-15-kw-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 50-250\/205 Cast Iron 15 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eDriven by a 15 kW electric motor, the NB 50-250\/205 end-suction centrifugal pump features an axial suction port (DN 65) and a radial discharge port (DN 50). Specified for commercial HVAC circulation, district heating installations, and industrial process water distribution, the pump mounts securely onto floor inertia bases in mechanical plant rooms.\u003c\/p\u003e\u003cp\u003eHydraulic wet-end output delivers a rated flow volume of 1180 L\/Min with a maximum operational head limit of 47.44 m. The EN-GJL-250 cast iron casing receives cataphoresis electrocoating to limit surface oxidation. Inside, a stainless steel impeller works alongside bronze wear rings and a BQQE shaft seal. Physical net weight measures 158 kg.\u003c\/p\u003e\u003cp\u003eElectrical power for the NB 50-250\/205 model is supplied by a 415 V three-phase electric motor rated at 15 kW output power. Nominal operating current draw measures 29.1 Amps during full load operations. Operating liquid temperatures span from -25°C to 120°C under 16 bar working pressure. Suction inlet measures DN 80 with a DN 50 discharge port.\u003c\/p\u003e\u003cp\u003eMotor protection on the NB 50-250\/205 pump complies with IP55 enclosure standards to resist dust and moisture ingress, supported by Class F thermal insulation and internal PTC thermistors. The back-pull-out casing layout allows service personnel to remove the motor drive and rotor assembly without unbolting the pump volute from system suction and discharge piping headers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\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\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\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":51148679414007,"sku":"93209316","price":8926.45,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-50-250-205-cast-iron-15-kw-end-suction-centrifugal-pump-with-closed-impeller.png?v=1789124288","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-50-250-205-cast-iron-15-kw-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}