{"product_id":"hoffman-402439-series-2100-pressure-reducing-main-valve-1-2-npt","title":"Hoffman 402439 Series 2100 Pressure Reducing Main Valve 1\/2\" NPT","description":"\u003cp\u003eMaintaining precise system pressure is critical for hydronic heating efficiency, and the \u003cstrong\u003eHoffman 402439\u003c\/strong\u003e serves as a reliable solution for boiler feed applications. Designed as a core component of the \u003cstrong\u003eHoffman Series 2100\u003c\/strong\u003e, this valve ensures your system remains at the optimal pressure level by automatically feeding water into the boiler as needed, preventing system stress and maintaining consistent thermal performance.\u003c\/p\u003e\u003cp\u003eThis pressure-reducing main valve utilizes a sensitive diaphragm and spring mechanism to react to downstream pressure fluctuations. When system pressure drops below the set point, the valve modulates open to restore balance, effectively isolating the supply line from the boiler loop and protecting sensitive components from over-pressurization.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Pressure Regulation:\u003c\/strong\u003e Maintains stable system pressure levels throughout the heating cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise Flow Control:\u003c\/strong\u003e Engineered for accurate and consistent water feed to closed-loop hydronic systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Construction:\u003c\/strong\u003e Built to withstand the rigors of high-temperature hydronic operating environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Integration:\u003c\/strong\u003e Features a standard 1\/2\" NPT connection for simplified installation into existing piping configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for commercial and residential hydronic heating systems, boiler feed lines, and pressure-regulated water supply circuits where reliable, long-term performance is required for system safety and efficiency.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128910413918,"sku":"402439","price":1772.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/402439_image_14ca6586-0c57-477b-99b0-a87fa4cce45e.png?v=1786071752","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-402439-series-2100-pressure-reducing-main-valve-1-2-npt","provider":"National Boiler Supply","version":"1.0","type":"link"}