CPVC Gasket
A CPVC Gasket is a sealing component placed between two CPVC flanges to prevent leakage of liquids or gases in a piping system. It is usually made from materials such as EPDM, PTFE, or rubber, which provide flexibility and tight sealing when the flanges are bolted together. The CPVC gasket fills the small gaps between the flange faces, ensuring a leak-proof and pressure-tight connection in CPVC piping systems.
The CPVC gasket is designed to withstand high temperatures and aggressive chemical environments. It is typically placed between two flanged connections to prevent leakage of fluids under varying pressure and temperature conditions, making it ideal for industrial, chemical, and water treatment applications.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
CPVC Gasket Details
A → Outer Diameter
B → Thickness
ID / Inner Diameter → Inside diameter of the pipe/flange bore
Bolt Circle → Bolt Circle Diameter (BCD / PCD)
No. of Holes → Number of Bolt Holes
| Nominal Pipe Size (Inch) | Outer Diameter (A) | Thickness (B) | Inner Diameter | Bolt Circle | No. of Holes |
| 1/2″ | 3.50 | 0.125 | 0.84 | 2.38 | 4 |
| 3/4″ | 3.88 | 0.125 | 1.05 | 2.75 | 4 |
| 1″ | 4.25 | 0.125 | 1.32 | 3.12 | 4 |
| 1-1/4″ | 4.62 | 0.125 | 1.66 | 3.50 | 4 |
| 1-1/2″ | 5.00 | 0.125 | 1.90 | 3.88 | 4 |
| 2″ | 6.00 | 0.125 | 2.38 | 4.75 | 4 |
| 2-1/2″ | 7.00 | 0.125 | 2.88 | 5.50 | 4 |
| 3″ | 7.50 | 0.125 | 3.50 | 6.00 | 4 |
| 4″ | 9.00 | 0.125 | 4.50 | 7.50 | 8 |
| 5″ | 10.00 | 0.125 | 5.56 | 8.50 | 8 |
| 6″ | 11.00 | 0.125 | 6.63 | 9.50 | 8 |
| 8″ | 13.50 | 0.125 | 8.63 | 11.75 | 8 |
| Property | Details |
| Product Type | CPVC Gasket (Sealing element for flanged joints) |
| Function | Provides leak-proof sealing between two flanges |
| Base Material | Elastomer compatible with CPVC (EPDM / NBR / PTFE / PTFE-lined EPDM) |
| Design Type | Full-face / Ring type |
| Size Range | ½” to 12” (custom sizes available) |
| Pressure Rating | Up to ~10 kg/cm² (10 bar approx.) |
| Temperature Range | EPDM: up to 90°C, NBR: up to 80°C, PTFE: up to 93°C |
| Installation Method | Placed between flanges and compressed with bolts |
| Standards | ASME B16.21, DIN EN 1514, IS standards |
| Compatibility | Designed for CPVC piping & flange systems |
| Applications | Chemical plants, water treatment, HVAC, industrial piping |
| Density | ~1.4 – 2.2 g/cm³ (depends on gasket material) |
| Tensile Strength | Moderate (varies by elastomer type) |
| Hardness | ~60–80 Shore A (typical for EPDM/NBR) |
| Elasticity | High (good flexibility & recovery) |
| Compression Set | Low (maintains sealing after compression) |
| Water Absorption | Very low |
| Thickness | Typically 1.5 mm – 5 mm |
| Surface Finish | Smooth / slightly textured |
| Weight | Lightweight |
Reliable Sealing: Provides a tight, leak-proof seal in flanged joints for high-pressure and high-temperature systems.
Chemical Resistance: Compatible with a wide range of corrosive fluids including acids, bases, and solvents.
High-Temperature Tolerance: Suitable for use in systems operating up to 93°C, depending on gasket material.
Flexible and Resilient: Maintains integrity under dynamic pressure and thermal cycling conditions.
Material Versatility: Available in multiple compositions (EPDM, NBR, PTFE) to match specific application needs.
Easy Installation: Lightweight and easy to fit during flange assembly, with good compressibility for uniform sealing.
Corrosion-Free Compatibility: Designed for use with CPVC systems, ensuring material compatibility and long service life.
| Temperature | Typical Pressure Rating* |
| 23°C (73°F) | 150 psi |
| 38°C (100°F) | 120 psi |
| 49°C (120°F) | 100 psi |
| 60°C (140°F) | 80 psi |
| 82°C (180°F) | 50 psi |
| 93°C (200°F) | 30 psi |
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 Gasket
1. Leak-Proof Sealing
CPVC gaskets create a tight seal between flange faces, preventing leakage of liquids or gases.
2. Chemical Resistance
They offer good resistance to many chemicals, acids, and corrosive fluids used in industrial processes.
3. Temperature Resistance
CPVC gasket materials such as EPDM or PTFE can withstand moderate to high temperatures used in CPVC piping systems.
4. Easy Installation
The gasket can be easily placed between flanges during assembly, making installation simple and quick.
5. Improved System Safety
By preventing leaks, gaskets help maintain system pressure and protect equipment and the surrounding environment.
6. Vibration Absorption
They help absorb minor vibrations and irregularities between flange surfaces, improving joint stability.
7. Low Maintenance
Once properly installed, CPVC gaskets require minimal maintenance and provide long-term sealing performance.
8. Cost-Effective
They are relatively inexpensive but play a critical role in ensuring the reliability of piping connections, especially when used with CPVC Flange systems.
Types of CPVC Gasket
1. EPDM Gasket
EPDM (Ethylene Propylene Diene Monomer) gaskets are commonly used with CPVC flanges. They offer excellent resistance to water, heat, and weathering.
2. PTFE (Teflon) Gasket
PTFE gaskets provide high chemical resistance and are suitable for aggressive chemicals and corrosive fluids in industrial applications.
3. Rubber Gasket
Rubber gaskets are flexible and provide a good sealing surface for general-purpose water and low-pressure piping systems.
4. Full Face Gasket
This gasket covers the entire flange face including bolt holes, providing better sealing and alignment in flange connections.
5. Ring Type Gasket
A ring gasket fits inside the bolt circle of the flange and is commonly used where space is limited.
Applications of CPVC Gasket
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?
When it comes to industrial-grade systems, the choice of the right manufacturer is as important as the material itself. Petron Thermoplast has earned a reputation as a trusted global leader in the field of CPVC Gaskets and industrial flow solutions. Our products are known for precision, performance, and durability, designed to meet the most demanding industry standards across the chemical and infrastructure sectors.
With so many options on the market, why should you trust Petron Thermoplast for your CPVC Gasket needs? The answer lies in our commitment to quality, service, and understanding your unique challenges.
