CPVC Non Return Valve (NRV)
A CPVC non return valve works the same as a check valve. You use it to make sure fluid only goes one way. When fluid tries to move back, the valve closes by itself. This keeps your system safe from things like contamination or broken equipment. A CPVC Non Return Valve is a type of check valve that allows fluid to flow only in one direction, preventing backflow in pipelines. Made from Chlorinated Polyvinyl Chloride (CPVC), it is highly resistant to chemicals, corrosion, and high temperatures. They automatically close when flow reverses, protecting the system from damage due to backflow or water hammer. These CPVC non return valves find applications in water supply, sewage systems, power plants, and industrial pipelines.
A CPVC Non Return Valve (NRV) is a type of check valve that allows fluid to flow in only one direction and automatically prevents backflow in a piping system. It operates without manual control — the valve opens when fluid flows in the forward direction and closes automatically when the flow stops or reverses, protecting pumps, pipelines, and equipment from damage.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
CPVC Non Return Valve (NRV) Details
| Nominal Size | A | B | C | F | G | Weight (CPVC lbs) | Cv (Socket/Thread) | Cv (Flange) | Cv (Spigot) | GPM (Horizontal) |
| 1/2″ | 2-1/16 | 3/4 | 4-1/16 | 5-3/16 | 2-5/16 | 0.33 | 6.3 | 6 | 6.3 | 0.10 |
| 3/4″ | 2-1/4 | 3/4 | 4-3/4 | 5-3/8 | 3-5/16 | 0.50 | 17 | 16 | 17 | 0.10 |
| 1″ | 2-7/8 | 3/4 | 5-1/8 | 5-3/4 | 3-5/8 | 0.79 | 25 | 24 | 25 | 0.25 |
| 1-1/4″ | 3-1/16 | 3/16 | 5-3/4 | 6-5/16 | 3-13/32 | 1.04 | 65 | 61 | 65 | 0.40 |
| 1-1/2″ | 3-1/2 | 1/4 | 6-1/4 | 6-3/4 | 4-3/8 | 1.37 | 80 | 82 | 86 | 0.75 |
| 2″ | 4-1/4 | 5/16 | 7-3/4 | 8-1/4 | 5-1/4 | 2.47 | 130 | 125 | 130 | 0.75 |
| 2-1/2″ | 6-3/16 | 7/16 | 9-5/16 | 11-3/8 | 7-1/2 | 6.90 | 200 | 183 | 200 | 1.50 |
| 3″ | 6-9/16 | 7/16 | 10-5/16 | 12-1/4 | 6-9/16 | 6.90 | 275 | 258 | 275 | 4.00 |
| 4″ | 7-1/2 | 8-1/4 | 11-3/16 | 12-3/4 | 7-1/2 | 12.13 | 500 | 489 | 500 | 5.50 |
| Parameter | Specification |
| Material (Body) | CPVC (Chlorinated Polyvinyl Chloride) |
| Internal Components | CPVC / PVC / Stainless Steel (spring, hinge optional) |
| Seal Material | EPDM / FKM (Viton) |
| Valve Type | Swing Type / Ball Type / Spring (Lift) Type |
| Operation | Automatic (no manual operation required) |
| Nominal Size Range | ½” to 12” (DN15 – DN300) |
| Connection Types | Socket, Threaded (BSP/NPT), Flanged, Union |
| End Standards | ASTM, ANSI, DIN, BS |
| Pressure Rating | PN10 / PN16 / Class 150 |
| Max Working Pressure | Up to 10–16 bar @ 23°C |
| Temperature Range | 0°C to 95°C (max ~93°C typical) |
| Flow Direction | One-way (prevents backflow) |
| Installation | Horizontal or vertical (depending on type) |
| Cracking Pressure | Low (varies by type, typically 0.2–0.5 bar) |
| Testing Standard | ISO 5208 |
| Standards | ASTM D1784, ISO 15877 |
| Density | ~1.45–1.58 g/cm³ |
| Color | Grey / Off-white |
| Corrosion Resistance | Excellent resistance to acids, alkalis, salts |
| Chemical Resistance | Suitable for aggressive and corrosive fluids |
| Surface Finish | Smooth internal bore → low friction loss |
| Thermal Resistance | Higher heat resistance than PVC |
| Mechanical Strength | Good tensile and impact strength |
| Weight | Lightweight compared to metal valves |
| Durability | Long service life, non-corrosive |
| Scaling Resistance | No rust or internal scaling |
| UV Resistance | Moderate (can be improved with additives) |
Backflow Prevention: Allows unidirectional flow, preventing contamination or system damage due to reverse flow.
Corrosion Resistance: Resistant to a wide range of acids, alkalis, and other corrosive fluids.
High Temperature Tolerance: Operates efficiently in high-temperature environments up to 93°C (200°F).
Durable Construction: Manufactured from tough, long-lasting CPVC material for extended service life.
Low Maintenance: Smooth operation with minimal wear and easy installation.
Versatile Connection Options: Available in threaded, socket, or flanged ends to suit various piping configurations.
Chemical Compatibility: Suitable for use in chemical processing, water treatment, and other industrial systems.
| Nominal Size (DN) | Inch Size | Pressure Rating @ 20°C | Max Working Pressure |
| DN15 | ½” | PN16 | 16 bar |
| DN20 | ¾” | PN16 | 16 bar |
| DN32 | 1¼” | PN16 | 16 bar |
| DN40 | 1½” | PN16 | 16 bar |
| DN50 | 2″ | PN16 | 16 bar |
| DN65 | 2½” | PN10 | 10 bar |
| DN80 | 3″ | PN10 | 10 bar |
Custom Product Manufacturing Available
If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.
Benefits of Using CPVC Non Return Valve (NRV)
1. Backflow Prevention
- Allows flow in one direction only
- Protects pumps, pipelines, and equipment from reverse flow damage
2. High Temperature Resistance
- Suitable for higher temperatures compared to uPVC
- Typical operating temperature up to 95°C
3. Excellent Chemical Resistance
- Resistant to acids, alkalis, salts, and most chemicals
- Ideal for aggressive chemical and industrial applications
4. Corrosion & Rust Free
- Does not corrode, rust, or scale
- Maintains a smooth internal surface over a long service life
5. Lightweight & Easy Installation
- Much lighter than metal NRVs
- Easy handling and faster installation
6. Leak-Proof Performance
- Tight sealing with EPDM / Viton seats
- Minimizes pressure loss and leakage
7. Low Maintenance
- No lubrication required
- Reduced downtime and maintenance costs
8. Long Service Life
- High durability under pressure and temperature
- Resistant to wear and chemical attack
9. Energy Efficient
- Smooth bore design reduces friction losses
- Improves overall system efficiency
10. Safe for Potable Water
- Non-toxic material
- Suitable for drinking water and food-grade applications
Types of CPVC Non Return Valve (NRV)
1️. Swing Type NRV
- Uses a hinged disc that swings open with forward flow
- Closes automatically when the flow reverses
- Suitable for low-pressure and horizontal pipelines
- Common in water treatment and chemical lines
2️. Ball Type NRV
- Contains a CPVC ball that moves with flow pressure
- Ball seats back to block reverse flow
- Ideal for vertical installations
- Good for slurry or slightly contaminated fluids
3️. Spring (Lift) Type NRV
- Uses a spring-loaded disc or piston
- Quick closing action reduces water hammer
- Suitable for high-pressure systems
- Used in chemical and industrial processing
4️. Diaphragm Type NRV
- Flexible diaphragm controls flow
- Provides tight sealing
- Used in sensitive chemical or pharmaceutical systems
5️. Wafer Type NRV
- Compact and lightweight design
- Installed between flanges
- Space-saving solution for industrial pipelines
- Power plants
Featured List of Applications
Process Industry
High purity applications
Electronic Industry
Electrical Industry
Semi-conductors industry
Pharmaceutical Industry
Solar power panels
Sugar Industry
Paper & pulp Industry
Nuclear power industry
Automotive Industry
DI water plants
Why Choose Petron Thermoplast?
Petron Thermoplast is a trusted manufacturer and supplier of CPVC Non Return Valve designed for reliable flow control, corrosion resistance, and long-term performance in industrial and utility piping systems. Our valves combine quality materials, precision engineering, and practical design to meet diverse application needs.
At Petron Thermoplast, selecting the CPVC Non Return Valve for an industrial application requires a clear understanding of the system demands and operational requirements. A CPVC Non Return Valve is well suited for applications that involve water fluid mixing and simultaneous flow distribution, while a proper evaluation of the system needs ensures the selected valve design aligns with performance expectations, enhancing the efficiency and reliability of the CPVC Non Return Valve.
