{"product_id":"grundfos-nb-50-250-221-cast-iron-2-2-kw-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 50-250\/221 Cast Iron 2.2 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eFacility condenser water circuits and cooling manifold skids rely on the Grundfos NB 50-250\/221 centrifugal pump. Fitted with a 2.2 kW motor, system piping interfaces through an axial DN 65 suction port and a radial DN 50 discharge flange.\u003c\/p\u003e\u003cp\u003eRated hydraulic performance generates 584 L\/Min flow and reaches a maximum head limit of 13.61 m. Housing construction features cataphoretically coated EN-GJL-250 cast iron, accommodating a stainless steel impeller and a BQQE mechanical seal. Net weight measures 74 kg.\u003c\/p\u003e\u003cp\u003eOperating from 415 V three-phase connections, the 2.2 kW drive requires 4.5 Amps nominal running current. Fluid temperature capabilities range from -25°C to 120°C under working pressure limits up to 16 bar. Flange interfaces are dimensioned at DN 65 inlet and DN 50 outlet.\u003c\/p\u003e\u003cp\u003eExternal enclosure protection provides an IP55 environmental rating with Class F insulation materials. External motor overload protection must be provided by the installer. The back-pull-out construction allows extraction of the motor and rotating components without disturbing suction or discharge pipe connections.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eService-friendly back-pull-out layout enables rotating element servicing without removing pipework.\u003c\/li\u003e\n\u003cli\u003eBalanced impeller geometry and shaft construction reduce operational vibration throughout duty range.\u003c\/li\u003e\n\u003cli\u003eVolute casing design incorporates integral base feet for direct mounting to concrete plinths.\u003c\/li\u003e\n\u003cli\u003eInternal wear rings retain hydraulic clearance tolerances throughout long service cycles.\u003c\/li\u003e\n\u003cli\u003eSolid stub shaft supported by sealed ball bearings carries axial and radial loads.\u003c\/li\u003e\n\u003cli\u003eStandard PN16 flanged port interfaces align with EN1092-2 heating and cooling headers.\u003c\/li\u003e\n\u003cli\u003eTotally enclosed fan cooled IEC motor rated for S1 duty cycles in ambient environments up to 40°C.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":51269613420791,"sku":"93209317","price":5082.66,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-50-250-221-cast-iron-2-2-kw-end-suction-centrifugal-pump-with-closed-impeller.png?v=1791282012","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-50-250-221-cast-iron-2-2-kw-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}