{"product_id":"grundfos-alpha2-25-60-cast-iron-autoadapt-circulator-pump-130mm-with-composite-impeller","title":"Grundfos Alpha2 25-60 Cast Iron AUTOADAPT Circulator Pump 130mm with Composite Impeller","description":"\u003cp\u003eBalancing a radiator heating system manually, adjusting a speed switch through the seasons as demand changes, is eliminated by the Grundfos Alpha2 25-60's AUTOADAPT function. Built with a cast iron housing for closed-loop domestic heating circuits, it reads system resistance continuously and adjusts output to match, rather than running at a fixed setting regardless of actual load.\u003c\/p\u003e\r\n\u003cp\u003eEven at peak output the pump draws only 34 W, delivering 32.3 L\/Min against 6 m of maximum head, with current consumption automatically varying between 0.04 A and 0.32 A on a 1 x 240 V supply as demand changes throughout the day. An Energy Efficiency Index of 0.17 reflects the electronically commutated motor's reduced power draw.\u003c\/p\u003e\r\n\u003cp\u003eAn automatic reduced night-time duty function lowers output further during low-demand overnight periods, detected from system flow rather than a preset timer. The cast iron housing and composite impeller are built for standard closed-loop radiator circuits, with a liquid temperature range from 2°C to 110°C.\u003c\/p\u003e\r\n\u003cp\u003eHoused at a compact 130 mm port-to-port length, the pump suits tighter valve spacing than the 180 mm variant, and an IPX4D enclosure provides a higher level of ingress protection than the IP44 rating typical of fixed-speed heating circulators. Class F insulation completes the specification.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eAUTOADAPT function reads system resistance continuously and adjusts pump output automatically\u003c\/li\u003e\r\n\u003cli\u003eAutomatic reduced night-time duty mode lowers output during low-demand overnight periods, detected from system flow\u003c\/li\u003e\r\n\u003cli\u003eElectronically commutated permanent magnet motor achieves an Energy Efficiency Index of 0.17\u003c\/li\u003e\r\n\u003cli\u003eCurrent consumption self-adjusts from 0.04 A to 0.32 A as the pump responds to changing system demand\u003c\/li\u003e\r\n\u003cli\u003eCast iron housing specified for closed-loop radiator circuits where potable water approval is not required\u003c\/li\u003e\r\n\u003cli\u003eComposite impeller construction delivers consistent hydraulic performance in closed-loop heating applications\u003c\/li\u003e\r\n\u003cli\u003eCompact 130 mm port-to-port body dimension accommodates tighter valve spacing\u003c\/li\u003e\r\n\u003cli\u003eIPX4D enclosure rating provides ingress protection against splashing water and dust\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":50978282668279,"sku":"99411150","price":773.55,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/grundfos-alpha2-25-60-cast-iron-autoadapt-circulator-pump-130mm-with-composite-impeller.png?v=1785223232","url":"https:\/\/foundationpumps.com.au\/products\/grundfos-alpha2-25-60-cast-iron-autoadapt-circulator-pump-130mm-with-composite-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}