{"product_id":"armstrong-572018-005-sx-30v-diaphragm-expansion-tank","title":"Armstrong 572018-005 SX-30V Diaphragm Expansion Tank","description":"\u003cp\u003eEfficiently manage fluid volume variations in your hydronic heating or cooling loop with the \u003cstrong\u003eArmstrong 572018-005\u003c\/strong\u003e diaphragm expansion tank. Designed specifically for the \u003cstrong\u003eSX-30V\u003c\/strong\u003e model, this unit serves as a critical buffer, effectively absorbing expanded fluid as temperatures rise to prevent system over-pressurization and maintain consistent charge pressure throughout your piping network.\u003c\/p\u003e\u003cp\u003eThis vessel operates using a flexible heavy-duty diaphragm that isolates the system water from the pressurized air cushion. When the water in the loop expands, it compresses the air-filled side of the diaphragm, preventing the pressure spikes that trigger nuisance relief valve activation or unnecessary water make-up, ultimately extending the service life of your boiler and surrounding hydronic components.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Regulation:\u003c\/strong\u003e Maintains precise charge pressure to prevent valve discharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFluid Management:\u003c\/strong\u003e Accommodates thermal expansion to ensure consistent system density.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Protection:\u003c\/strong\u003e Reduces mechanical stress on pumps and heat exchangers by limiting pressure fluctuations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for residential and light commercial hydronic heating systems requiring reliable pressure control and protection against thermal shock and water loss.\u003c\/p\u003e","brand":"Armstrong","offers":[{"title":"Default Title","offer_id":43136993624158,"sku":"SX-30V","price":724.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/SX_30V_image_8e2e61a0-32b5-4e6a-afbc-66f971034abe.png?v=1786162309","url":"https:\/\/nationalboilersupply.com\/products\/armstrong-572018-005-sx-30v-diaphragm-expansion-tank","provider":"National Boiler Supply","version":"1.0","type":"link"}