1 Inch NRV Check Valve – Use, Working & Price Details
1 Inch NRV Check Valve – Use, Working & Price Details
The 1 inch NRV check valve, also known as a 25mm non-return valve, is a compact and critical fitting in plumbing and industrial flow systems. Its purpose is to allow fluid to flow in one direction while preventing any reverse flow that could damage pumps, meters, or tanks. Due to its universal size and compatibility with domestic and industrial pipelines, the 1-inch NRV valve is one of the most commonly used types of valves across multiple industries.
How Does a 1 Inch NRV Work?
This valve contains a flap, disc, or ball that moves to open under forward pressure and seals shut under backflow pressure. The mechanism varies depending on type: lift, swing, ball, or spring-loaded NRV. The choice of NRV mechanism typically depends on system pressure, fluid velocity, installation space, and horizontal/vertical pipe orientation. Spring-loaded NRVs are ideal where space and quick shutoff are essential, while swing-type valves are preferred in gravity-fed water systems.
Types of 1 Inch NRV Valves
- Lift Type NRV: The disc moves vertically to allow or restrict flow. Requires horizontal installation and steady pressure.
- Swing Type NRV: The disc swings open with flow and returns to close position with reverse flow. Easy to maintain and cost-effective.
- Ball Type NRV: A solid ball moves with flow and sits on the seat when flow reverses. Common in sewage and slurry applications.
- Spring Loaded NRV: Uses a spring to force the disc closed quickly when flow stops. Compact and fast-acting.
- Wafer Type NRV: Dual plate or single plate design mounted between flanges. Saves space and supports higher pressures.
Technical Specifications
| Parameter | Details |
|---|---|
| Size | 1 inch (25mm) |
| Type | Lift, Swing, Spring Loaded, Wafer |
| Material | Brass, SS304, CI, MS |
| Pressure Rating | PN10 to PN25 / 150 PSI – 300 PSI |
| End Connection | Screwed (BSP), Flanged, Wafer |
| Use | Pumps, Water Lines, Geysers, Overhead Tanks |
| Standards | IS 5312, API 594, BS 5153 |
| Installation Orientation | Horizontal / Vertical (spring-loaded) |
1 Inch NRV Valve Price (Approx. 2025)
| Material | Type | Approx. Price (INR) |
|---|---|---|
| Brass | Screwed | ₹90 – ₹150 |
| SS 304 | Flanged | ₹350 – ₹550 |
| CI | Swing | ₹250 – ₹350 |
| MS | Wafer | ₹300 – ₹400 |
| SS 316 | Spring Loaded | ₹550 – ₹750 |
Note: Prices are indicative and vary with flange standard (ASA/PN), quantity, pressure rating, and MOC.
Where Is It Used?
- Domestic water supply pipelines
- Industrial pump discharge lines
- Overhead water tanks
- Boiler and hot water systems
- Hydraulic and fuel lines
- Irrigation pump sets
- Water filtration and reverse osmosis systems
- HVAC chilled water return lines
Installation Tips
- Always match the valve material with pipeline medium (e.g., SS for chemicals, brass for potable water).
- Install NRV valves with an arrow pointing in the direction of flow.
- Use PTFE tape or thread sealant for BSP threaded joints.
- For vertical installation, ensure valve is spring-loaded.
- Maintain clearance space for valve disc operation and maintenance.
Trusted Suppliers in India
- Udhhyog – Official Website | ? Call Now | Request Quote
- Kartar Valves – Punjab-based ISI Certified Valve Brand
- Zoloto Valves – Leading Brass and CI valve manufacturer
- Sant Valves – Over 60 years of legacy in valve industry
- Hyper Valve – Specialized in High Pressure NRVs
Related Resources
- Wafer Type Check Valve Manufacturers
- All Types of Check Valves Explained
- Pilot Operated NRV Check Valve
Contact Udhhyog for 1 Inch NRVs
Need help selecting the right check valve? Contact Udhhyog for expert guidance and the best pricing in India. We supply bulk quantities, all materials, and ensure fast shipping across the country. With ISI-certified NRVs in stock, you get guaranteed performance, proper documentation, and reliable customer support.
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