{"product_id":"grundfos-nb-50-160-139-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 50-160\/139 Cast Iron 0.75 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eHydronic transfer stations and building service manifolds deploy the Grundfos NB 50-160\/139 centrifugal pump. Coupled to a 0.75 kW motor drive, fluid enters through an axial DN 65 suction port and exits through a radial DN 50 discharge flange.\u003c\/p\u003e\u003cp\u003eFluid movement rating attains 584 L\/Min volumetric capacity and develops 5.164 m maximum head. Constructed with an EN-GJL-250 cast iron volute protected by cataphoretic electrocoating, internal hydraulics feature a stainless steel impeller and BQQE mechanical shaft seal. Net weight is 43 kg.\u003c\/p\u003e\u003cp\u003eOperating across a 415 V three-phase power line, the drive requires 1.6 Amps to develop 0.75 kW output. Working tolerances accommodate fluid temperatures spanning -25°C to 120°C at pressures reaching 16 bar. Flanged connections feature DN 65 inlet and DN 50 outlet dimensions.\u003c\/p\u003e\u003cp\u003eDrive housing integrity meets IP55 ingress specifications with Class F thermal insulation. Because built-in thermal protection is not included, external motor overload protection must be supplied. Maintenance is streamlined via a back-pull-out arrangement allowing rotating element removal while the casing remains connected to piping.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\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\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\u003c\/ul\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":51269609029879,"sku":"93209301","price":3743.74,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-50-160-139-cast-iron-end-suction-centrifugal-pump-with-closed-impeller.png?v=1791281991","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-50-160-139-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}