{"product_id":"bell-gossett-1bn359lf-pta-448-asme-expansion-tank","title":"Bell \u0026 Gossett 1BN359LF PTA-448 ASME Expansion Tank","description":"\u003cp\u003eManaging thermal expansion in domestic water systems is critical to preventing damage and ensuring operational longevity, which is where the \u003cstrong\u003e1BN359LF\u003c\/strong\u003e PTA-448 expansion tank excels. Designed by Bell \u0026amp; Gossett to handle fluctuating system pressures, this ASME-constructed vessel provides a reliable buffer for expanding water, effectively mitigating the risk of pressure build-up and component fatigue within your plumbing infrastructure.\u003c\/p\u003e\u003cp\u003eThe system utilizes a sophisticated diaphragm design that acts as a secure barrier between the system water and the steel shell. By incorporating a high-grade, FDA-approved polypropylene liner and a durable butyl diaphragm, the unit prevents direct contact between the water and the tank wall, ensuring consistent water quality while maintaining precise system equilibrium during thermal cycles.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME Construction:\u003c\/strong\u003e Built to rigorous pressure vessel standards for maximum safety and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Isolation:\u003c\/strong\u003e Polypropylene liner and butyl diaphragm prevent internal corrosion and contamination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpansion Management:\u003c\/strong\u003e Absorbs volume increases to protect valves, piping, and heaters from excessive stress.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for commercial domestic water heating systems, high-rise potable water distribution, and heavy-duty hydronic installations requiring ASME-certified thermal expansion control.\u003c\/p\u003e","brand":"Bell \u0026 Gossett","offers":[{"title":"Default Title","offer_id":43127895556190,"sku":"1BN359LF","price":8573.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/1BN359LF_image_3fd205d5-0a58-4f1a-b5e9-120269b1328d.png?v=1786058876","url":"https:\/\/nationalboilersupply.com\/products\/bell-gossett-1bn359lf-pta-448-asme-expansion-tank","provider":"National Boiler Supply","version":"1.0","type":"link"}