{"id":374,"date":"2026-06-14T11:28:43","date_gmt":"2026-06-14T11:28:43","guid":{"rendered":"https:\/\/redfire.co.in\/?post_type=product&p=374"},"modified":"2026-06-27T14:13:22","modified_gmt":"2026-06-27T14:13:22","slug":"air-release-valve-25mm","status":"publish","type":"product","link":"https:\/\/redfire.co.in\/?product=air-release-valve-25mm","title":{"rendered":"Air Release Valve 25mm"},"content":{"rendered":"
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ISI-Certified 25mm Air Release Valve<\/span><\/h1>\n
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Overview<\/span><\/h2>\n

The\u00a0<\/span>ISI-Certified 25mm Air Release Valve<\/span><\/strong>\u00a0is a precision-engineered automatic air release device designed to eliminate trapped air from water pipelines, pumping systems, and fire-fighting risers. Manufactured in compliance with stringent Indian Standards and bearing the prestigious\u00a0<\/span>ISI Mark<\/span><\/strong>\u00a0\u2014 a certification from the\u00a0<\/span>Bureau of Indian Standards (BIS)<\/span><\/strong>\u00a0\u2014 this valve ensures quality, safety, and performance you can trust.<\/span><\/p>\n

Air entrapment in water systems can cause significant operational issues including flow reduction, pressure fluctuations, water hammer, and dry running of pumps<\/span>. The 25mm Air Release Valve automatically releases accumulated air from the highest points of the system, preventing air locks and ensuring efficient, uninterrupted flow. When water reaches the valve, a reliable float mechanism seals the outlet, allowing pressure to build up and the system to function optimally<\/span>.<\/span><\/p>\n

Whether you’re installing a new water supply network, maintaining a fire-fighting dry riser system, or upgrading an existing pumping station, the ISI-Certified 25mm Air Release Valve delivers the reliability, durability, and performance you need for long-term, trouble-free operation.<\/span><\/p>\n

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Key Features<\/span><\/h2>\n
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Feature<\/span><\/th>\nDescription<\/span><\/th>\n<\/tr>\n<\/thead>\n
ISI Mark Certified<\/span><\/strong><\/td>\nBearing the prestigious ISI Mark, this valve conforms to\u00a0<\/span>IS 14845:2000<\/span><\/strong>\u00a0\u2014 the Indian Standard for resilient seated cast iron air relief valves for water works purposes<\/span><\/td>\n<\/tr>\n
Automatic Float-Operated Mechanism<\/span><\/strong><\/td>\nA floating ball arrangement inside the valve housing automatically releases air while sealing the outlet when water reaches the valve, preventing water loss<\/span><\/td>\n<\/tr>\n
High-Quality Materials<\/span><\/strong><\/td>\nAvailable in\u00a0<\/span>Stainless Steel SS304<\/span><\/strong>,\u00a0<\/span>Forged Brass<\/span><\/strong>, or\u00a0<\/span>Cast Iron<\/span><\/strong>\u00a0construction for superior corrosion resistance and long service life<\/span><\/td>\n<\/tr>\n
Screwed \/ Threaded Inlet<\/span><\/strong><\/td>\n25mm size with\u00a0<\/span>Male British Standard Pipe (MBSP)<\/span><\/strong>\u00a0threads for easy and secure installation<\/span><\/td>\n<\/tr>\n
High Pressure Rating<\/span><\/strong><\/td>\nWorking pressure up to\u00a0<\/span>7-10 kgf\/cm\u00b2<\/span><\/strong>\u00a0with hydrostatic test pressure of\u00a0<\/span>15-21 kgf\/cm\u00b2<\/span><\/strong>, ensuring reliable performance under demanding conditions<\/span><\/td>\n<\/tr>\n
Wide Temperature Range<\/span><\/strong><\/td>\nOperates reliably across a broad temperature spectrum, suitable for both hot and cold water systems<\/span><\/td>\n<\/tr>\n
Low Maintenance Design<\/span><\/strong><\/td>\nRobust construction with high-density polyethylene float and EPDM\/Nitrile rubber seals minimises maintenance requirements<\/span><\/td>\n<\/tr>\n
Anti-Tamper Design<\/span><\/strong><\/td>\nTamper-proof construction eliminates water wastage and ensures system integrity<\/span><\/td>\n<\/tr>\n
Versatile Applications<\/span><\/strong><\/td>\nSuitable for potable water, treated fresh water, fire-fighting systems, and industrial applications<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Technical Specifications<\/span><\/h2>\n
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Parameter<\/span><\/th>\nSpecification<\/span><\/th>\n<\/tr>\n<\/thead>\n
Valve Size<\/span><\/strong><\/td>\n25mm (1 inch)<\/span><\/td>\n<\/tr>\n
Standard<\/span><\/strong><\/td>\nIS 14845:2000 (ISI Mark Certified)<\/span><\/td>\n<\/tr>\n
Type<\/span><\/strong><\/td>\nSingle air valve \u2013 Large orifice type (S2) \/ Small orifice type (S1) as per IS 14845<\/span><\/td>\n<\/tr>\n
Body Material<\/span><\/strong><\/td>\nStainless Steel SS304 \/ Forged Brass \/ Cast Iron (as per model)<\/span><\/td>\n<\/tr>\n
Float Material<\/span><\/strong><\/td>\nHigh Density Expanded Polyethylene \/ Rubber-coated Cork<\/span><\/td>\n<\/tr>\n
Seat \/ O-Ring Material<\/span><\/strong><\/td>\nNitrile Rubber \/ EPDM<\/span><\/td>\n<\/tr>\n
Strainer Material<\/span><\/strong><\/td>\nStainless Steel SS304<\/span><\/td>\n<\/tr>\n
Spring Material<\/span><\/strong><\/td>\nStainless Steel SS304<\/span><\/td>\n<\/tr>\n
Inlet Connection<\/span><\/strong><\/td>\n25mm MBSP (Male British Standard Pipe Thread)<\/span><\/td>\n<\/tr>\n
Working Pressure<\/span><\/strong><\/td>\nUp to 7-10 kgf\/cm\u00b2<\/span><\/td>\n<\/tr>\n
Hydrostatic Test Pressure<\/span><\/strong><\/td>\n15-21 kgf\/cm\u00b2<\/span><\/td>\n<\/tr>\n
Maximum Working Temperature<\/span><\/strong><\/td>\nUp to 80\u00b0C<\/span><\/td>\n<\/tr>\n
End Connection<\/span><\/strong><\/td>\nScrewed \/ Threaded<\/span><\/td>\n<\/tr>\n
Approximate Weight<\/span><\/strong><\/td>\n4.5 kg (for SS304 model)<\/span><\/td>\n<\/tr>\n
Warranty<\/span><\/strong><\/td>\n12 months from date of supply<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Why Choose ISI-Certified 25mm Air Release Valve?<\/span><\/h2>\n
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    ISI Mark Certified<\/span><\/strong>\u00a0\u2014 Bearing the prestigious ISI Mark, this valve is manufactured in compliance with\u00a0<\/span>IS 14845:2000<\/span><\/strong>, the Indian Standard for air relief valves. This certification from the\u00a0<\/span>Bureau of Indian Standards (BIS)<\/span><\/strong>\u00a0ensures that the valve meets stringent quality, safety, and performance requirements<\/span><\/p>\n<\/li>\n

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    Superior Material Quality<\/span><\/strong>\u00a0\u2014 Available in premium materials including\u00a0<\/span>Stainless Steel SS304<\/span><\/strong>,\u00a0<\/span>Forged Brass<\/span><\/strong>\u00a0(IS 6912 Gr.FLB), and\u00a0<\/span>Cast Iron<\/span><\/strong>, offering excellent corrosion resistance and long service life<\/span><\/p>\n<\/li>\n

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    Automatic Operation<\/span><\/strong>\u00a0\u2014 The float-operated mechanism automatically releases trapped air without manual intervention, ensuring system efficiency and preventing air locks<\/span><\/p>\n<\/li>\n

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    High Pressure Capability<\/span><\/strong>\u00a0\u2014 With working pressure up to\u00a0<\/span>7-10 kgf\/cm\u00b2<\/span><\/strong>\u00a0and hydrostatic test pressure of\u00a0<\/span>15-21 kgf\/cm\u00b2<\/span><\/strong>, this valve is built to withstand demanding operational conditions<\/span><\/p>\n<\/li>\n

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    Prevents System Damage<\/span><\/strong>\u00a0\u2014 By eliminating trapped air, the valve prevents water hammer, pressure fluctuations, flow reduction, and dry running of pumps \u2014 protecting your entire water system<\/span><\/p>\n<\/li>\n

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    Trusted by Authorities<\/span><\/strong>\u00a0\u2014 Widely accepted by Municipal Corporations, Irrigation Authorities, Water Supply Authorities, and various industrial users<\/span><\/p>\n<\/li>\n

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    Made in India<\/span><\/strong>\u00a0\u2014 Proudly manufactured in India to the highest quality standards<\/span><\/p>\n<\/li>\n<\/ul>\n

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    Ideal Applications<\/span><\/h2>\n
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      Fire Fighting Systems<\/span><\/strong>\u00a0\u2014 Dry risers and wet riser systems for releasing air when water is pumped into the riser<\/span><\/p>\n<\/li>\n

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      Water Supply Networks<\/span><\/strong>\u00a0\u2014 Municipal water distribution and pipeline systems<\/span><\/p>\n<\/li>\n

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      Pumping Stations<\/span><\/strong>\u00a0\u2014 Preventing dry running of pumps and maintaining prime<\/span><\/p>\n<\/li>\n

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      Irrigation Systems<\/span><\/strong>\u00a0\u2014 Agricultural water supply and sprinkler systems<\/span><\/p>\n<\/li>\n

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      Industrial Water Systems<\/span><\/strong>\u00a0\u2014 Process water, cooling water, and utility applications<\/span><\/p>\n<\/li>\n

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      Hot & Cold Water Systems<\/span><\/strong>\u00a0\u2014 Eliminating entrapped air for improved thermal efficiency<\/span><\/p>\n<\/li>\n

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      High-Rise Buildings<\/span><\/strong>\u00a0\u2014 Water distribution in multi-storey residential and commercial complexes<\/span><\/p>\n<\/li>\n<\/ul>\n

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      Compliance & Standards<\/span><\/h2>\n
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      Standard<\/span><\/th>\nDescription<\/span><\/th>\n<\/tr>\n<\/thead>\n
      IS 14845:2000<\/span><\/strong><\/td>\nResilient Seated Cast Iron Air Relief Valves for Water Works Purposes<\/span><\/td>\n<\/tr>\n
      IS 6912 Gr.FLB<\/span><\/strong><\/td>\nForged Brass specification (for brass models)<\/span><\/td>\n<\/tr>\n
      IS 3444<\/span><\/strong><\/td>\nStainless Steel specification (for SS304 models)<\/span><\/td>\n<\/tr>\n
      ISI Mark<\/span><\/strong><\/td>\nBureau of Indian Standards certification mark<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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      For detailed product inquiries, technical specifications, bulk order pricing, or to place an order, please contact our sales team.<\/span><\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

      The\u00a0<\/span>ISI-Certified 25mm Air Release Valve<\/span><\/strong>\u00a0is a precision-engineered automatic air release device designed to eliminate trapped air from water pipelines, pumping systems, and fire-fighting risers. Manufactured in compliance with stringent Indian Standards and bearing the prestigious\u00a0<\/span>ISI Mark<\/span><\/strong>\u00a0\u2014 a certification from the\u00a0<\/span>Bureau of Indian Standards (BIS)<\/span><\/strong>\u00a0\u2014 this valve ensures quality, safety, and performance you can trust.<\/span><\/p>\n","protected":false},"featured_media":407,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[21],"product_cat":[15],"product_tag":[],"class_list":["post-374","product","type-product","status-publish","has-post-thumbnail","product_brand-isi","product_cat-uncategorized","first","instock","shipping-taxable","purchasable","product-type-simple"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/redfire.co.in\/index.php?rest_route=\/wp\/v2\/product\/374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/redfire.co.in\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/redfire.co.in\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/redfire.co.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=374"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/redfire.co.in\/index.php?rest_route=\/wp\/v2\/media\/407"}],"wp:attachment":[{"href":"https:\/\/redfire.co.in\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=374"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/redfire.co.in\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=374"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/redfire.co.in\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=374"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/redfire.co.in\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}