{"product_id":"grundfos-nb-40-250-245-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 40-250\/245 Cast Iron 18.5 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eConstructed for fixed foundation mounting in mechanical rooms, the NB 40-250\/245 single-stage end-suction pump connects via DN 65 suction and DN 40 discharge ports. A 18.5 kW electric motor provides mechanical power for continuous water circulation across building service headers.\u003c\/p\u003e\u003cp\u003eFluid output parameters show a rated throughput of 1080 L\/Min and a maximum head limit of 68.79 m. Electrocoating treatment on the cast iron casing limits rust in hydronic loops. The internal rotor holds a stainless steel impeller with bronze wear rings. Unit physical weight is 179 kg.\u003c\/p\u003e\u003cp\u003eOperating on a 415 V three-phase power supply, the NB 40-250\/245 electric motor yields 18.5 kW output power with a current draw of 35.3 Amps. Media temperature capabilities span from -25°C to 120°C under continuous line pressures up to 16 bar. Flanged ports feature DN 65 suction and DN 40 discharge sizing.\u003c\/p\u003e\u003cp\u003eWinding insulation on the NB 40-250\/245 motor complies with Class F standards within an IP55 dust and spray resistant motor housing equipped with PTC thermistors. Service procedures benefit from back-pull-out construction, permitting internal rotor disassembly without disconnecting main system pipework headers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\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\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\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":51148676923639,"sku":"93209268","price":9007.79,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-40-250-245-cast-iron-end-suction-centrifugal-pump-with-closed-impeller.png?v=1789124255","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-40-250-245-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}