{"product_id":"armstrong-ax-20v-pre-charged-asme-expansion-tank","title":"Armstrong AX-20V Pre-charged ASME Expansion Tank","description":"\u003cp\u003eMaintain consistent pressure and protect your commercial hydronic heating or chilled water system from damaging fluctuations with the \u003cstrong\u003eArmstrong AX-20V\u003c\/strong\u003e pre-charged expansion tank. This high-capacity, ASME-certified vessel is engineered to accommodate the expansion of system fluid as it heats, preventing relief valve discharge and component stress in demanding mechanical environments.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eAX-20V\u003c\/strong\u003e utilizes a rugged, pre-charged diaphragm design that provides a reliable air-to-water barrier, effectively isolating the system fluid from the internal air cushion. By absorbing the volumetric changes caused by temperature shifts, this tank ensures stable system pressure, which extends the service life of boilers, pumps, and terminal units throughout the facility.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME Certified:\u003c\/strong\u003e Manufactured to strict ASME pressure vessel codes for maximum safety and institutional compliance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Diaphragm:\u003c\/strong\u003e High-grade internal membrane prevents waterlogging and air absorption into the system fluid.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e Durable exterior coating ensures long-term integrity in varied mechanical room conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficient Volume Control:\u003c\/strong\u003e Specifically sized to manage thermal expansion effectively in medium-to-large scale hydronic circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for commercial heating loops, large-scale chilled water systems, industrial process piping, and multi-zone hydronic installations requiring ASME-rated pressure control.\u003c\/p\u003e","brand":"Armstrong","offers":[{"title":"Default Title","offer_id":43136368377950,"sku":"AX-20V","price":1987.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/AX_20V_image_567d2613-9914-43ba-9b0f-ac96952472ad.png?v=1786130745","url":"https:\/\/nationalboilersupply.com\/products\/armstrong-ax-20v-pre-charged-asme-expansion-tank","provider":"National Boiler Supply","version":"1.0","type":"link"}