{"product_id":"bell-gossett-101221lf-3-4-npt-isolation-flange-set","title":"Bell \u0026 Gossett 101221LF 3\/4\" NPT Isolation Flange Set","description":"\u003cp\u003eThe 3\/4\" NPT isolation flange set provides a secure, leak‑proof point for shutting off flow during maintenance or repair of hydronic equipment. Featuring the **101221LF** part number, this Bell \u0026amp; Gossett solution simplifies isolation without removing pipe sections.\u003c\/p\u003e\u003cp\u003eDesigned with a dual‑flange construction, the set bolts onto existing pipework, creating a sealed barrier that isolates sections while maintaining system integrity. The NPT threads ensure a tight, pressure‑rated connection, and the compact design fits tight spaces common in boiler and chiller loops.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak Prevention:\u003c\/strong\u003e Precision‑machined faces minimize seepage under high pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Installation:\u003c\/strong\u003e Standard 3\/4\" NPT threads reduce labor time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Compatibility:\u003c\/strong\u003e Materials selected for consistent performance across temperature ranges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Corrosion‑resistant alloy end caps extend service life.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for boiler shut‑off points, chilled‑water plant maintenance, boiler feed‑water loops, and any hydronic system requiring quick, reliable isolation.\u003c\/p\u003e","brand":"Bell \u0026 Gossett","offers":[{"title":"Default Title","offer_id":43112724463710,"sku":"101221LF","price":82.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/101221LF_image_02585032-b93d-4355-b191-eec4b1e37e26.png?v=1785948025","url":"https:\/\/nationalboilersupply.com\/products\/bell-gossett-101221lf-3-4-npt-isolation-flange-set","provider":"National Boiler Supply","version":"1.0","type":"link"}