{"product_id":"grundfos-ups-50-60-4-f-dn50-flanged-circulator-pump-415v-96403942-5016","title":"Grundfos UPS 50-60\/4 F DN50 Flanged Circulator Pump 415V 96403942 #5016","description":"\u003cdiv style=\"max-width: 900px; margin: 0 auto; padding: 20px; line-height: 1.6;\"\u003e\n\u003ch2\u003eGrundfos UPS 50-60\/4 F 280 DN50 Flanged Circulator Pump 415V 96403942\u003c\/h2\u003e\n\u003cp\u003eThis listing is for a \u003cstrong\u003eGrundfos UPS 50-60\/4 F 280\u003c\/strong\u003e commercial heating circulator pump, product number \u003cstrong\u003e96403942\u003c\/strong\u003e. It is a three-speed, four-pole, glandless wet-rotor circulator with \u003cstrong\u003eDN50 flanged connections\u003c\/strong\u003e, a \u003cstrong\u003e280 mm port-to-port length\u003c\/strong\u003e and a \u003cstrong\u003e415V three-phase electrical supply\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003ePart of the Grundfos UPS Series 200 range, this pump is designed for circulating clean water in commercial heating, cooling and HVAC systems. Its three selectable operating speeds allow the hydraulic performance to be adjusted to suit the installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Supplied in \u003cstrong\u003eas-new surplus condition\u003c\/strong\u003e. The pump has not been installed or used but may show minor cosmetic markings from storage and handling. \u003cstrong\u003eGuarantee:\u003c\/strong\u003e Supplied with a \u003cstrong\u003e2-year guarantee\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Grundfos\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e UPS 50-60\/4 F 280\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrundfos product number:\u003c\/strong\u003e 96403942\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct range:\u003c\/strong\u003e UPS Series 200\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump type:\u003c\/strong\u003e Single-head glandless wet-rotor circulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e Four-pole, three-speed induction motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical supply:\u003c\/strong\u003e 3 × 400–415V, 50Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed control:\u003c\/strong\u003e Three manually selectable speeds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection size:\u003c\/strong\u003e DN50 inlet \/ DN50 outlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection type:\u003c\/strong\u003e DIN flanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange pressure rating:\u003c\/strong\u003e PN6\/10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort-to-port length:\u003c\/strong\u003e 280 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum head class:\u003c\/strong\u003e  approximately 5.2 metres nominal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 1 power input:\u003c\/strong\u003e 130–240 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 2 power input:\u003c\/strong\u003e 140–290 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 3 power input:\u003c\/strong\u003e 220–430 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 1 rated current:\u003c\/strong\u003e 0.43 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 2 rated current:\u003c\/strong\u003e 0.50 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 3 rated current:\u003c\/strong\u003e 0.92 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid temperature, continuous:\u003c\/strong\u003e -10°C to +120°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum short-duration liquid temperature:\u003c\/strong\u003e +140°C, subject to operating conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient temperature:\u003c\/strong\u003e 0°C to +40°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump housing material:\u003c\/strong\u003e Cast iron EN-GJL-250\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpeller material:\u003c\/strong\u003e Stainless steel EN 1.4301 \/ AISI 304\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor construction:\u003c\/strong\u003e Canned wet-rotor design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical shaft seal:\u003c\/strong\u003e None – glandless construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor protection:\u003c\/strong\u003e Built-in thermal overload switch; external control requirements depend on terminal-box configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHistorical energy classification:\u003c\/strong\u003e Class C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNet weight:\u003c\/strong\u003e Approximately 23.1 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGross weight:\u003c\/strong\u003e Approximately 24.4 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance note:\u003c\/strong\u003e This is a three-speed pump. The actual flow and head depend on the selected speed and system resistance. The 6-metre designation identifies the nominal head class rather than a guaranteed duty point at every flow rate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed help confirming suitability?\u003c\/strong\u003e\u003cbr\u003eCall us on \u003cstrong\u003e01803 220416\u003c\/strong\u003e for technical advice.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Documentation\u003c\/h3\u003e\n\u003cp\u003eOriginal Grundfos UPS \/ UPSD Series 200 technical data booklet, including performance curves, electrical specifications, dimensional drawings and minimum inlet-pressure requirements.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.pumpsalesdirect.co.uk\/pub\/media\/data_sheets\/upscc.pdf\" rel=\"nofollow noopener\" target=\"_blank\"\u003e View Grundfos UPS \/ UPSD Series 200 Technical Data Booklet \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRelevant section:\u003c\/strong\u003e Page 28 – UPS 50-60\/4 F 280 and UPSD 50-60\/4 F 280.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCommercial central-heating circulation\u003c\/li\u003e\n\u003cli\u003eBoiler primary and secondary circuits\u003c\/li\u003e\n\u003cli\u003eCommercial HVAC systems\u003c\/li\u003e\n\u003cli\u003eDistrict-heating circulation\u003c\/li\u003e\n\u003cli\u003eAir-conditioning and cooling-water circulation\u003c\/li\u003e\n\u003cli\u003eHeating distribution and mixing circuits\u003c\/li\u003e\n\u003cli\u003eHeat recovery systems\u003c\/li\u003e\n\u003cli\u003eReplacement of existing DN50 flanged UPS circulators\u003c\/li\u003e\n\u003cli\u003eMaintaining older 415V three-phase commercial installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat is the Grundfos UPS 50-60\/4 F used for?\u003c\/h4\u003e\n\u003cp\u003eThe Grundfos UPS 50-60\/4 F is a \u003cstrong\u003ecommercial wet-rotor circulator\u003c\/strong\u003e designed for moving clean water around heating, cooling and HVAC systems.\u003c\/p\u003e\n\u003cp\u003eIt is commonly installed in plant rooms, commercial buildings and larger heating systems where a three-phase circulator is required.\u003c\/p\u003e\n\u003ch4\u003eWhat does UPS 50-60\/4 F 280 mean?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPS:\u003c\/strong\u003e Grundfos three-speed wet-rotor circulator range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50:\u003c\/strong\u003e Nominal DN50 inlet and outlet connection size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60:\u003c\/strong\u003e Nominal maximum head class of 60 decimetres \/ approximately 6 metres.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\/4:\u003c\/strong\u003e Four-pole motor version.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eF:\u003c\/strong\u003e Flanged pipe connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e280:\u003c\/strong\u003e Port-to-port installation length of 280 mm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhat is the difference between UPS 50-60\/4 and UPS 50-60\/2?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003e\/4\u003c\/strong\u003e and \u003cstrong\u003e\/2\u003c\/strong\u003e indicate different motor pole configurations.\u003c\/p\u003e\n\u003cp\u003eThe UPS 50-60\/4 uses a four-pole motor, operating at a lower rotational speed than the two-pole version. The hydraulic performance curves and electrical characteristics are therefore different.\u003c\/p\u003e\n\u003cp\u003eAlthough both pumps belong to the DN50 circulator family, they should not be considered interchangeable without checking the required flow, head, electrical supply and dimensions.\u003c\/p\u003e\n\u003ch4\u003eWhat are the three operating speeds and power consumption?\u003c\/h4\u003e\n\u003cp\u003eAccording to the original Grundfos Series 200 data booklet, the \u003cstrong\u003e415V three-phase UPS 50-60\/4 F\u003c\/strong\u003e has the following electrical characteristics:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 1:\u003c\/strong\u003e 130–240 W, rated current 0.43 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 2:\u003c\/strong\u003e 140–290 W, rated current 0.50 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed 3:\u003c\/strong\u003e 220–430 W, rated current 0.92 A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSelecting a lower speed reduces the pump's hydraulic performance and can reduce electricity consumption and system noise.\u003c\/p\u003e\n\u003cp\u003eThe power figures are electrical input-power ranges taken from the manufacturer's technical documentation.\u003c\/p\u003e\n\u003ch4\u003eWhy replace this pump with another original UPS circulator?\u003c\/h4\u003e\n\u003cp\u003eA significant advantage is the ability to retain an existing \u003cstrong\u003e415V three-phase installation\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eMany modern high-efficiency circulators use \u003cstrong\u003e230V single-phase power\u003c\/strong\u003e. Replacing an older three-phase pump with one of these models may require alterations to the electrical supply, controls, protection equipment and wiring.\u003c\/p\u003e\n\u003cp\u003eThis original-style Grundfos UPS also has \u003cstrong\u003eDN50 PN6\/10 flanges\u003c\/strong\u003e and a \u003cstrong\u003e280 mm port-to-port length\u003c\/strong\u003e. Modern replacement pumps may have different installation lengths, even when the connection size and nominal head are similar.\u003c\/p\u003e\n\u003cp\u003eWhere the existing installation is serviceable, a matching replacement can avoid unnecessary electrical and pipework modifications.\u003c\/p\u003e\n\u003cp\u003eModern high-efficiency circulators can provide substantial energy savings, so the most suitable option depends on the installation, expected running hours and replacement costs.\u003c\/p\u003e\n\u003ch4\u003eWhat are the minimum inlet-pressure requirements?\u003c\/h4\u003e\n\u003cp\u003eGrundfos provides specific minimum inlet-pressure figures for the \u003cstrong\u003eUPS 50-60\/4 F 280\u003c\/strong\u003e to prevent cavitation and associated pump noise or bearing damage.\u003c\/p\u003e\n\u003cp\u003eThe original manufacturer data booklet specifies:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e75°C liquid temperature:\u003c\/strong\u003e 0.05 bar minimum inlet pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90°C liquid temperature:\u003c\/strong\u003e 0.15 bar minimum inlet pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e120°C liquid temperature:\u003c\/strong\u003e 1.45 bar minimum inlet pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese are minimum pressures required at the pump suction flange during operation.\u003c\/p\u003e\n\u003cp\u003eThe required inlet pressure increases significantly at higher temperatures because hot water is more susceptible to cavitation.\u003c\/p\u003e\n\u003cp\u003eWhen considering a modern replacement, the new pump's minimum inlet-pressure or NPSH requirements should also be checked against the existing system.\u003c\/p\u003e\n\u003ch4\u003eWhat liquid temperature can this pump handle?\u003c\/h4\u003e\n\u003cp\u003eGrundfos specifies a continuous liquid temperature range of \u003cstrong\u003e-10°C to +120°C\u003c\/strong\u003e for the UPS Series 200 range.\u003c\/p\u003e\n\u003cp\u003eTemperatures up to \u003cstrong\u003e+140°C\u003c\/strong\u003e are permitted for short periods under the manufacturer's specified conditions.\u003c\/p\u003e\n\u003cp\u003eAt elevated water temperatures, adequate inlet pressure is essential to prevent cavitation. The applicable system-pressure rating and any installation-specific restrictions must also be observed.\u003c\/p\u003e\n\u003ch4\u003eWhat pressure rating does this pump have?\u003c\/h4\u003e\n\u003cp\u003eThis pump has \u003cstrong\u003ePN6\/10 flanged connections\u003c\/strong\u003e, suitable for matching DIN flange arrangements.\u003c\/p\u003e\n\u003cp\u003eThe permitted system pressure depends on the pressure rating of the installed flange arrangement and connected equipment. The lower-rated component or connection determines the maximum permissible operating pressure.\u003c\/p\u003e\n\u003cp\u003eThe PN pressure rating describes the allowable system pressure and should not be confused with the differential head generated by the pump.\u003c\/p\u003e\n\u003ch4\u003eWhat liquids can this pump circulate?\u003c\/h4\u003e\n\u003cp\u003eGrundfos specifies the UPS Series 200 range for \u003cstrong\u003ethin, clean, non-aggressive and non-explosive liquids\u003c\/strong\u003e without solid particles, fibres or mineral oils.\u003c\/p\u003e\n\u003cp\u003eTypical suitable applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClean central-heating water\u003c\/li\u003e\n\u003cli\u003eCommercial heating-system water\u003c\/li\u003e\n\u003cli\u003eClean cooling water\u003c\/li\u003e\n\u003cli\u003eAir-conditioning circulation water\u003c\/li\u003e\n\u003cli\u003eCompatible closed-loop heating and cooling liquids\u003c\/li\u003e\n\u003cli\u003eClean industrial circulation water\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHeating-system water quality should meet recognised standards, such as VDI 2035, or equivalent local guidance.\u003c\/p\u003e\n\u003cp\u003eThe pump is not intended for sewage, wastewater, abrasive solids, sludge, fibres, mineral oils, diesel, petrol or aggressive chemicals.\u003c\/p\u003e\n\u003ch4\u003eCan this pump be used with glycol?\u003c\/h4\u003e\n\u003cp\u003eSome Grundfos wet-rotor circulators are suitable for water-glycol mixtures, but compatibility must be checked against the specific pump and liquid.\u003c\/p\u003e\n\u003cp\u003eThe glycol type, concentration and operating temperature affect the liquid's viscosity and density. This can change hydraulic performance, electrical loading and the lubrication conditions of the wet-rotor bearings.\u003c\/p\u003e\n\u003cp\u003eBefore using this UPS 50-60\/4 F with glycol or antifreeze, confirm that the mixture is compatible with the pump materials and operating limits.\u003c\/p\u003e\n\u003ch4\u003eIs this suitable for domestic hot-water circulation?\u003c\/h4\u003e\n\u003cp\u003eThis is the \u003cstrong\u003ecast-iron housing version\u003c\/strong\u003e of the UPS 50-60\/4 F.\u003c\/p\u003e\n\u003cp\u003eFor domestic hot-water applications, Grundfos generally specifies pumps with bronze housings to reduce corrosion risk.\u003c\/p\u003e\n\u003cp\u003eThis standard cast-iron version should therefore not automatically be selected for potable or domestic hot-water circulation.\u003c\/p\u003e\n\u003ch4\u003eDoes this pump have a mechanical shaft seal?\u003c\/h4\u003e\n\u003cp\u003eNo. This is a \u003cstrong\u003eglandless canned-rotor circulator\u003c\/strong\u003e, meaning the pump and motor form an integrated wet-rotor unit without a conventional mechanical shaft seal.\u003c\/p\u003e\n\u003cp\u003eThe pumped liquid lubricates and cools the rotor and bearing assembly. The pump must therefore be correctly filled and vented before operation and must not be run dry.\u003c\/p\u003e\n\u003ch4\u003eDoes this pump need a control panel?\u003c\/h4\u003e\n\u003cp\u003eThe UPS 50-60\/4 F uses a three-phase electrical supply and incorporates a thermal overload switch.\u003c\/p\u003e\n\u003cp\u003eThe required external protection and control arrangement depends on the terminal-box module fitted. Grundfos specifies external contactor arrangements for standard-module installations, while alternative protection and relay modules have different wiring requirements.\u003c\/p\u003e\n\u003cp\u003eThe existing installation should be checked before connection, and all electrical work should be completed by a suitably qualified person.\u003c\/p\u003e\n\u003ch4\u003eHow should this pump be installed?\u003c\/h4\u003e\n\u003cp\u003eThe pump must be installed with the \u003cstrong\u003emotor shaft horizontal\u003c\/strong\u003e, regardless of the direction of the surrounding pipework.\u003c\/p\u003e\n\u003cp\u003eThe correct flow direction, terminal-box position and access for venting and servicing should be checked before commissioning.\u003c\/p\u003e\n\u003cp\u003eThe pump must not be operated dry. Grundfos also advises against operating continuously at very low flow rates, where overheating can occur.\u003c\/p\u003e\n\u003ch4\u003eCan this replace a modern Grundfos MAGNA circulator?\u003c\/h4\u003e\n\u003cp\u003eThe pump may be suitable for replacing an existing circulator with comparable hydraulic performance, but it should not be regarded as a direct replacement based only on nominal DN size or head class.\u003c\/p\u003e\n\u003cp\u003eModern MAGNA circulators use electronically controlled motors and can have different electrical supplies, installation lengths, control arrangements and performance curves.\u003c\/p\u003e\n\u003cp\u003eA replacement should be selected by checking the required duty point, flange standard, installation length, electrical supply and system controls.\u003c\/p\u003e\n\u003ch4\u003eWhat should I check before ordering?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eExisting pump model and product number\u003c\/li\u003e\n\u003cli\u003eElectrical supply: 415V three-phase, 50Hz\u003c\/li\u003e\n\u003cli\u003eDN50 PN6\/10 flange compatibility\u003c\/li\u003e\n\u003cli\u003e280 mm port-to-port installation length\u003c\/li\u003e\n\u003cli\u003eRequired flow and head duty point\u003c\/li\u003e\n\u003cli\u003eExisting motor-control and protection arrangements\u003c\/li\u003e\n\u003cli\u003eMinimum inlet pressure at the operating temperature\u003c\/li\u003e\n\u003cli\u003ePumped-liquid compatibility and water quality\u003c\/li\u003e\n\u003cli\u003eMotor shaft orientation and available installation space\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eAbout Our Stock\u003c\/h3\u003e\n\u003cp\u003eWe specialise in supplying \u003cstrong\u003enew and unused surplus commercial pumps, circulators and obsolete Grundfos equipment\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis pump is supplied in \u003cstrong\u003eas-new surplus condition\u003c\/strong\u003e and may show minor cosmetic marks from storage and handling.\u003c\/p\u003e\n\u003cp\u003eSupplied with a \u003cstrong\u003e2-year guarantee\u003c\/strong\u003e. Please check the product number, electrical supply, flange dimensions and hydraulic performance before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e```\u003c\/p\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":64937814753657,"sku":null,"price":795.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1218\/7894\/files\/71bdfa10-f093-484a-8622-5829d198a265.jpg?v=1792418788","url":"https:\/\/thepumpdealer.co.uk\/products\/grundfos-ups-50-60-4-f-dn50-flanged-circulator-pump-415v-96403942-5016","provider":"The Pump Dealer","version":"1.0","type":"link"}