{"product_id":"grundfos-cr-1-21-vertical-multistage-centrifugal-pump","title":"Grundfos CR 1-21 Vertical Multistage Centrifugal Pump","description":"\u003ch2\u003eGrundfos CR 1-21 Vertical Multistage Centrifugal Pump\u003c\/h2\u003e\n\u003cp\u003e\n  Engineered for ultra-high-pressure clean water supply, sophisticated filtration systems, reverse osmosis treatment loops, and advanced boiler feed configurations, the \n  \u003cstrong\u003eGrundfos CR 1-21\u003c\/strong\u003e is an industrial-grade vertical multistage centrifugal inline pump. Featuring an expansive 21-stage internal stack designed to maximize head pressure while keeping the nominal volume flow highly controlled, this vertical powerhouse slots directly into existing inline piping networks with suction and discharge connections arranged on a uniform line.\n\u003c\/p\u003e\n\u003cp\u003e\n  The CR 1-21 is built to run continuously under high-stress conditions and features Grundfos's legendary \u003cstrong\u003ecartridge shaft seal structure\u003c\/strong\u003e. This pre-assembled component design contains mechanical wear factors and isolates runtime friction, allowing field service technicians to swap seals quickly in minutes without disconnecting the primary drive motor.\n\u003c\/p\u003e\n\n\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtreme Multi-Stage Stack:\u003c\/strong\u003e 21 precision-balanced, laser-welded stainless steel impellers deliver immense vertical pressure lifting metrics within a highly space-efficient footprint.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial-Grade Materials:\u003c\/strong\u003e Cast iron pump head stool and baseplate block anchor a highly wear-resistant internal fluid core built entirely of premium 304 stainless steel.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSuperior Seal Longevity:\u003c\/strong\u003e Equipped with a balanced mechanical cartridge shaft seal paired with EPDM elastomers for elite structural temperature tolerances and leakage control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInline Connection Matching:\u003c\/strong\u003e Standard oval or round companion flange connection layouts enable simple, straight-through horizontal line piping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n  ⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e This CR 1 high-head configuration is specialized for demanding industrial water filtration, reverse osmosis ($RO$), pressure wash boosting systems, micro-boiler networks, and complex commercial cooling circuits.\n\u003c\/p\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":42961944805470,"sku":"GF-CR1-21-96082193","price":3500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Grundfos_CR_3-10_Vertical_Multistage_Centrifugal_Pump_10-Stage_Inline_High_Pressure_Booster_Pump_Cast_Iron_Base_Stainless_Steel_Hydraulics_MPN_96516597.webp?v=1782929014","url":"https:\/\/nationalboilersupply.com\/products\/grundfos-cr-1-21-vertical-multistage-centrifugal-pump","provider":"National Boiler Supply","version":"1.0","type":"link"}