Description
ISI-Certified 25mm Air Release Valve
Overview
The ISI-Certified 25mm Air Release Valve is 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 ISI Mark — a certification from the Bureau of Indian Standards (BIS) — this valve ensures quality, safety, and performance you can trust.
Air entrapment in water systems can cause significant operational issues including flow reduction, pressure fluctuations, water hammer, and dry running of pumps. 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.
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.
Key Features
| Feature | Description |
|---|---|
| ISI Mark Certified | Bearing the prestigious ISI Mark, this valve conforms to IS 14845:2000 — the Indian Standard for resilient seated cast iron air relief valves for water works purposes |
| Automatic Float-Operated Mechanism | A floating ball arrangement inside the valve housing automatically releases air while sealing the outlet when water reaches the valve, preventing water loss |
| High-Quality Materials | Available in Stainless Steel SS304, Forged Brass, or Cast Iron construction for superior corrosion resistance and long service life |
| Screwed / Threaded Inlet | 25mm size with Male British Standard Pipe (MBSP) threads for easy and secure installation |
| High Pressure Rating | Working pressure up to 7-10 kgf/cm² with hydrostatic test pressure of 15-21 kgf/cm², ensuring reliable performance under demanding conditions |
| Wide Temperature Range | Operates reliably across a broad temperature spectrum, suitable for both hot and cold water systems |
| Low Maintenance Design | Robust construction with high-density polyethylene float and EPDM/Nitrile rubber seals minimises maintenance requirements |
| Anti-Tamper Design | Tamper-proof construction eliminates water wastage and ensures system integrity |
| Versatile Applications | Suitable for potable water, treated fresh water, fire-fighting systems, and industrial applications |
Technical Specifications
| Parameter | Specification |
|---|---|
| Valve Size | 25mm (1 inch) |
| Standard | IS 14845:2000 (ISI Mark Certified) |
| Type | Single air valve – Large orifice type (S2) / Small orifice type (S1) as per IS 14845 |
| Body Material | Stainless Steel SS304 / Forged Brass / Cast Iron (as per model) |
| Float Material | High Density Expanded Polyethylene / Rubber-coated Cork |
| Seat / O-Ring Material | Nitrile Rubber / EPDM |
| Strainer Material | Stainless Steel SS304 |
| Spring Material | Stainless Steel SS304 |
| Inlet Connection | 25mm MBSP (Male British Standard Pipe Thread) |
| Working Pressure | Up to 7-10 kgf/cm² |
| Hydrostatic Test Pressure | 15-21 kgf/cm² |
| Maximum Working Temperature | Up to 80°C |
| End Connection | Screwed / Threaded |
| Approximate Weight | 4.5 kg (for SS304 model) |
| Warranty | 12 months from date of supply |
Why Choose ISI-Certified 25mm Air Release Valve?
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ISI Mark Certified — Bearing the prestigious ISI Mark, this valve is manufactured in compliance with IS 14845:2000, the Indian Standard for air relief valves. This certification from the Bureau of Indian Standards (BIS) ensures that the valve meets stringent quality, safety, and performance requirements
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Superior Material Quality — Available in premium materials including Stainless Steel SS304, Forged Brass (IS 6912 Gr.FLB), and Cast Iron, offering excellent corrosion resistance and long service life
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Automatic Operation — The float-operated mechanism automatically releases trapped air without manual intervention, ensuring system efficiency and preventing air locks
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High Pressure Capability — With working pressure up to 7-10 kgf/cm² and hydrostatic test pressure of 15-21 kgf/cm², this valve is built to withstand demanding operational conditions
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Prevents System Damage — By eliminating trapped air, the valve prevents water hammer, pressure fluctuations, flow reduction, and dry running of pumps — protecting your entire water system
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Trusted by Authorities — Widely accepted by Municipal Corporations, Irrigation Authorities, Water Supply Authorities, and various industrial users
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Made in India — Proudly manufactured in India to the highest quality standards
Ideal Applications
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Fire Fighting Systems — Dry risers and wet riser systems for releasing air when water is pumped into the riser
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Water Supply Networks — Municipal water distribution and pipeline systems
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Pumping Stations — Preventing dry running of pumps and maintaining prime
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Irrigation Systems — Agricultural water supply and sprinkler systems
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Industrial Water Systems — Process water, cooling water, and utility applications
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Hot & Cold Water Systems — Eliminating entrapped air for improved thermal efficiency
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High-Rise Buildings — Water distribution in multi-storey residential and commercial complexes
Compliance & Standards
| Standard | Description |
|---|---|
| IS 14845:2000 | Resilient Seated Cast Iron Air Relief Valves for Water Works Purposes |
| IS 6912 Gr.FLB | Forged Brass specification (for brass models) |
| IS 3444 | Stainless Steel specification (for SS304 models) |
| ISI Mark | Bureau of Indian Standards certification mark |
For detailed product inquiries, technical specifications, bulk order pricing, or to place an order, please contact our sales team.
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