UPVC Flanged Check Valve
UPVC Flanged Check Valves are a type of Non Return Valves which are suitable for a variety of applications, offering durability & reliability. The function of the non-return valve is to limit the flow of water fluid in one direction. The UPVC Flanged Check Valve is a one-way control valve that controls the flow and is designed to prevent backflow in pipeline systems. Made from high-grade Unplasticized Polyvinyl Chloride (UPVC), this valve offers exceptional resistance to chemicals and corrosion, making it ideal for aggressive or corrosive fluid applications.
It is specialised for a robust flanged end design for secured and leak-free installation in industrial systems. The internal check mechanism ensures the smooth operation with minimal pressure drop and reliable sealing under all flow conditions. The main role of a Flanged Check Valve is to control the flow of fluid in a piping system. This occurs through the valve opening and closing.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
UPVC Flanged Check Valve Details
| 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 / Typical Value | Remarks |
| Valve Type | Flanged Check Valve (Non-Return) | Prevents reverse flow automatically |
| Design Type | Swing Type / Lift Type | Depends on application and flow conditions |
| Body Material | UPVC (Unplasticized Polyvinyl Chloride) | Excellent corrosion & chemical resistance |
| Disc Material | UPVC / ABS / PP | Ensures durability and smooth operation |
| Seal Material | EPDM / FKM (Viton) | Leak-proof sealing and chemical compatibility |
| End Connection | Flanged (DIN / ANSI / JIS / BS) | Strong, leak-proof bolted connection |
| Size Range | 1½” to 8” (DN40 to DN200) | Standard industrial sizes |
| Pressure Rating | PN10 (≈10 bar / 150 PSI) | Rated at ~20°C |
| Operating Temp | 0°C to 60°C | Suitable for UPVC systems |
| Flow Direction | Unidirectional | Marked on valve body |
| Operation | Automatic (pressure-operated) | No manual control required |
| Installation | Horizontal or Vertical | Upward flow preferred for vertical |
| Standards | ASTM D1784, ISO 9393, DIN / ANSI | Industrial standards |
| Corrosion Res. | Excellent | Suitable for acids, alkalis, salts |
| Pressure Drop | Low | Streamlined internal design |
| Weight | Lightweight | Easy handling and installation |
| Maintenance | Low / Maintenance-free | Non-metallic, no rusting |
| Applications | Water, chemical, irrigation, wastewater | Wide industrial use |
Backflow Prevention: Automatically stops reverse flow to protect pumps and equipment.
Flanged Ends: Secure and easy connection to flanged pipelines with standard drilling patterns.
Chemical Resistant: UPVC body withstands corrosive media including acids and alkalis.
Low Pressure Drop: Streamlined internal design for efficient flow with minimal resistance.
Durable & Lightweight: High mechanical strength combined with easy handling and installation.
Maintenance-Free: Non-metallic, corrosion-resistant components reduce wear and servicing needs.
Quiet Operation: Spring or gravity-assisted closing reduces water hammer and noise.
| Nominal Size (DN / mm) | Flange Standard | Pressure Rating at 20 °C | Equivalent Rating |
| DN 50 (2″) | ANSI / DIN | 10 bar | PN10 / Class 150 |
| DN 65 (2½″) | ANSI / DIN | 10 bar | PN10 |
| DN 80 (3″) | ANSI / DIN | 10 bar | PN10 |
| DN 100 (4″) | ANSI / DIN | 10 bar | PN10 |
| DN 125 (5″) | DIN | 10 bar | PN10 |
| DN 150 (6″) | DIN | 10 bar | PN10 |
| DN 200 (8″) | DIN | 6–8 bar | PN6 |
| DN 250 (10″) | DIN | 6 bar | PN6 |
| DN 300 (12″) | DIN | 6 bar | PN6 |
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 UPVC Flanged Check Valve
Solution to the numerous projects that revolve around the fluid.
They Prevent backflow of water fluid
minimising the corrosion of the system to prevents leakage.
Low cost of maintenance since it has a self-cleaning mechanism
Easy to install
cheap and locally available, easily accessible.
Suitable for handling most chemicals in chemical compatibility with acids, bases, salts, and potable water
Types of UPVC Flanged Check Valve
1. Swing Check Valve
- These designed has a hinged disc that swings waterwhen wated flows forward and closes when the flow reverses.
- The operation of gravity or backflow closes the disc.
- Lift Check Valve
- Disc moves up and down (axially) on a guide, lifting when flow is forward and seating when flow reverses.
- Flow pushes the disc up; reverse flow forces it down to seal.
- Spring-Loaded Check Valve
- Uses a spring to keep the disc or plunger seated; forward flow pushes it open.
- Spring ensures a quick closing even with low backflow.
4. Dual Plate or Wafer Check Valve
- Two semi-circular plates pivot on a hinge in the centre.
- Plates open with forward flow and snap shut with reverse flow.
5. Tilting Disc Check Valve
- Design: Disc tilts on a central pivot to allow flow in one direction.
- Operation: Forward flow lifts the disc, and reverse flow tilts it closed.
Why Choose Petron Thermoplast?
Petron Thermoplast understands specifying a UPVC flanged check valve means considering the entire lifecycle within your specific system, whether it’s for a hydrocarbon application boiler & steam application, a chemicals production process, or an effluent treatment plant. By choosing Petron Thermoplast, you gain a partner committed to ensuring the valve’s connection is as reliable as the valve itself. By systematically evaluating the system’s pressure, temperature, and maintenance.
