{"product_id":"armstrong-572018-004-diaphragm-expansion-tank-90","title":"Armstrong 572018-004 Diaphragm Expansion Tank 90","description":"\u003cp\u003eEfficiently manage thermal expansion in your hydronic heating or cooling loop with the \u003cstrong\u003eArmstrong 572018-004\u003c\/strong\u003e diaphragm expansion tank. This high-quality component is engineered to provide reliable storage for increased fluid volume during temperature cycles, ensuring your system maintains optimal charge pressure without the need for constant water make-up.\u003c\/p\u003e\u003cp\u003eThe unit utilizes a flexible internal diaphragm to isolate the system fluid from the air cushion. As the fluid temperature rises and expands, the diaphragm flexes against the pressurized air pocket, absorbing the excess volume and preventing nuisance activation of pressure relief valves. This maintenance of stable pressure prolongs the lifespan of system components by preventing frequent cycling and excessive strain.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Regulation:\u003c\/strong\u003e Maintains consistent charge pressure to prevent relief valve discharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFluid Management:\u003c\/strong\u003e Absorbs expanded volume during heating cycles to prevent system over-pressurization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Separation:\u003c\/strong\u003e Provides an effective barrier between system fluid and the air pre-charge for long-term stability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for commercial and residential hydronic heating systems, radiant floor loops, and chilled water circuits requiring precise pressure control.\u003c\/p\u003e","brand":"Armstrong","offers":[{"title":"Default Title","offer_id":43133375676510,"sku":"572018-004","price":552.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/572018_004_image_d4f59dff-281e-4c84-a245-57f102a08c22.png?v=1786104920","url":"https:\/\/nationalboilersupply.com\/products\/armstrong-572018-004-diaphragm-expansion-tank-90","provider":"National Boiler Supply","version":"1.0","type":"link"}