In the world of industrial engineering, ensuring smooth, efficient, and safe fluid flow is critical. Among the many components used in pipeline systems, Non Return Valves (NRVs) play a key role in preventing backflow and protecting sensitive equipment. One standard that engineers in India and globally rely on is IS 5312-2 – the Indian Standard for swing-type NRVs.
In this guide, we’ll explore what IS 5312-2 entails, why it’s important, and how engineers can choose the right Non Return Valve IS 5312-2 for various industrial applications.
What Is a Non Return Valve (NRV)?
A Non Return Valve, also called a check valve, is a unidirectional valve that allows fluid to flow in one direction only. When the flow stops or reverses, the valve closes automatically to prevent backflow. This helps:
- Protect pumps and compressors
- Maintain pressure consistency
- Avoid fluid contamination
- Prevent mechanical damage in systems
What Is IS 5312-2?
IS 5312-2 is the Indian Standard specification for swing-type non-return valves used in waterworks. It ensures uniformity in design, materials, testing, and performance for NRVs across India. The “Part 2” section of the standard specifically covers metallic-bodied valves with swing-type disc operation.
Key aspects of IS 5312-2 include:
- Pressure rating (generally PN 1.0 to PN 1.6)
- Size range (typically 50mm to 600mm and beyond)
- Flanged ends for pipeline installation
- Testing procedures (hydrostatic, backflow resistance, etc.)
- Compliance with durability and safety standards
Applications of IS 5312-2 Non Return Valves
IS 5312-2 compliant NRVs are widely used in:
- Water supply systems
- Wastewater treatment plants
- Pumping stations
- Irrigation networks
- Firefighting pipelines
- Industrial fluid distribution systems
These valves help ensure one-way flow and prevent contamination or damage caused by reverse flow.
Why Engineers Prefer IS 5312-2 Valves
1. Standardized Performance
IS 5312-2 valves follow strict guidelines that ensure performance, safety, and durability. This reduces design errors and boosts efficiency in engineering systems.
2. Reliable Backflow Prevention
Designed to operate automatically without the need for external control, these NRVs provide dependable backflow protection in both low- and high-pressure systems.
3. Available in Wide Sizes
Whether you need a 50mm valve or a 600mm solution, IS 5312-2 valves come in all standard sizes to fit varied industrial applications.
4. Easy Installation & Maintenance
With flanged ends and simple swing mechanism, these valves are easy to install, inspect, and maintain — saving engineers valuable time and resources.
Non Return Valve Types (Brief Overview)
While IS 5312-2 refers to swing-type NRVs, engineers should know about other common types too:
| Type | Function | Typical Use |
|---|---|---|
| Swing Type | Disc swings on hinge | Water pipelines, IS 5312-2 |
| Lift Type | Disc lifts vertically | High-pressure vertical lines |
| Dual Plate | Two spring-loaded plates | Compact, space-saving lines |
| Tilting Disc | Tilts to reduce slam | Pumping stations, surge-sensitive lines |
Trusted Non Return Valve Manufacturers in Ahmedabad
If you’re sourcing IS 5312-2 NRVs, Ahmedabad, Gujarat is home to some of the most trusted names in industrial valve manufacturing. One such reputed manufacturer is resilientgatevalve, known for:
- High-quality NRVs compliant with IS 5312-2
- Full range from 1” to 28” sizes
- Durable construction in cast iron, ductile iron, and stainless steel
- Custom solutions for OEMs and infrastructure contractors
- Reliable support and on-time delivery across India
How to Choose the Right IS 5312-2 Valve
When selecting a valve, consider the following:
- Fluid Type: Is the valve handling water, slurry, or chemicals?
- Size & Pressure Rating: Match valve size and PN class with system specs
- Installation Position: Some NRVs are better for vertical/horizontal use
- Material of Construction: Choose CI/DI/SS based on fluid and corrosion risk
- Supplier Reputation: Buy from an experienced valve manufacturer or factory in Ahmedabad
Integrating NRVs with Other Valve Systems
IS 5312-2 valves work well alongside other key valves, including:
- Resilient Seated Sluice Valves – for open/close control of water
- Metal Seated Sluice Valves – for tougher conditions and higher temperatures
- Air Valves Single and Double – to remove trapped air from the system
- Pressure Reducing Valves (PRVs) – to maintain downstream pressure levels
When all these valves are supplied by a single source like resilientgatevalve, compatibility and reliability are guaranteed.
Conclusion
For engineers working on water distribution, industrial flow systems, or municipal pipelines, choosing IS 5312-2 certified Non Return Valves is a smart, standards-compliant choice. Backed by specifications designed for Indian conditions and supported by expert manufacturers in Ahmedabad like resilientgatevalve, these valves ensure long-term efficiency, safety, and low maintenance.
Whether you’re designing a new system or upgrading an existing one, make sure your NRVs are IS 5312-2 compliant — and built to last.
Contact resilientgatevalve Today
Website:resilientgatevalve.com
Email: resilientgatevalve@gmail.com
Location: Plot No. 129/2, Shed No. 1, Cair Estate, Ranipur Road, Narol, Ahmedabad 380028, Gujarat, INDIA.