{"product_id":"grundfos-nb-40-125-142-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 40-125\/142 Cast Iron 0.55 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eFeaturing an end-suction structural layout with DN 65 axial suction and DN 40 radial discharge ports, the NB 40-125\/142 pump processes clean liquid media across active HVAC circuits. Powered by a 0.55 kW electric motor, the system operates across continuous commercial pumping cycles.\u003c\/p\u003e\u003cp\u003eThe hydraulic wet-end achieves a rated flow capacity of 406 L\/Min with a maximum head rating of 5.275 m. Cast iron housing materials provide solid pressure containment up to 16 bar. The internal assembly houses a stainless steel impeller fitted with bronze wear rings. Net equipment weight is 38 kg.\u003c\/p\u003e\u003cp\u003ePower specifications for the NB 40-125\/142 end-suction pump call for a 415 V three-phase electrical supply rated at 0.55 kW motor power. Current draw under load measures 14 Amps. Operating fluid temperatures span -25°C to 120°C with a maximum working pressure rating of 16 bar. The housing features DN 65 axial suction and DN 40 radial discharge ports.\u003c\/p\u003e\u003cp\u003eThe NB 40-125\/142 electric motor carries an IP55 ingress protection rating alongside Class F thermal insulation and integrated PTC thermistors. System maintenance relies on back-pull-out architecture, enabling drive head disassembly while the pump volute stays secured to concrete foundation bases and pipe runs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\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\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\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":51148675842295,"sku":"93209252","price":3179.94,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-40-125-142-cast-iron-end-suction-centrifugal-pump-with-closed-impeller.png?v=1789124240","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-40-125-142-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}