{"product_id":"grundfos-nb-50-125-138-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","title":"Grundfos NB 50-125\/138 Cast Iron 0.75 kW End Suction Centrifugal Pump with Closed Impeller","description":"\u003cp\u003eSecondary heating distribution lines in plant facilities rely on the Grundfos NB 50-125\/138 centrifugal pump. Fitted with a 0.75 kW motor, system piping interfaces through an axial DN 65 suction port and a radial DN 50 discharge flange.\u003c\/p\u003e\u003cp\u003eDischarge throughput reaches approx. 796 L\/Min operational volume while reaching a approx. 6.4 m maximum head. Housing construction features cataphoretically coated EN-GJL-250 cast iron, accommodating a stainless steel impeller and a BQQE mechanical seal. Net weight measures 42 kg.\u003c\/p\u003e\u003cp\u003eAt a rated feed of 415 V three-phase, the motor draws 1.6 Amps to deliver 0.75 kW rated mechanical power. 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\u003eMotor casing construction provides IP55 ingress sealing and Class F winding insulation. 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\u003eSolid stub shaft configuration supported by deep groove ball bearings absorbs axial thrust loads.\u003c\/li\u003e\n\u003cli\u003eStandardized EN1092-2 PN16 flange dimensions match standard commercial and district pipe manifolds.\u003c\/li\u003e\n\u003cli\u003eHigh-efficiency IEC electric drive motor maximum flow of S1 continuous operation in ambient conditions up to 40°C.\u003c\/li\u003e\n\u003cli\u003eBack-pull-out construction allows drive and impeller removal without disconnecting suction or discharge lines.\u003c\/li\u003e\n\u003cli\u003ePrecision balanced rotor and runner assemblies minimize operating vibration across all pump speeds.\u003c\/li\u003e\n\u003cli\u003eCast iron volute casing with integral mounting feet absorbs hydraulic forces and pipework stresses.\u003c\/li\u003e\n\u003cli\u003eReplaceable wear rings retain correct internal hydraulic clearances over long operating periods.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":51269607882999,"sku":"93209296","price":3390.31,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-nb-50-125-138-cast-iron-end-suction-centrifugal-pump-with-closed-impeller.png?v=1791281986","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-nb-50-125-138-cast-iron-end-suction-centrifugal-pump-with-closed-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}