UPVC Gasket
A UPVC gasket is a sealing part placed between connecting flanges to create a static seal. This will maintain the leakage-proof sealing in all operating conditions. The UPVC Gasket is a sealing component designed for use in flanged piping systems to prevent leaks at the joint interface. Made from flexible and chemically resistant elastomeric materials compatible with UPVC systems, these gaskets provide a secure and durable seal between UPVC flanges. Ideal for chemical and industrial applications, UPVC gaskets ensure reliable performance under varying pressure and temperature conditions.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
UPVC 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 |
| Parameter | Specification |
| Material | EPDM / NBR / FPM (compatible with UPVC systems) |
| Size Range | ½” to 12” (15 mm to 315 mm) |
| Shape | Full Face or Ring Type |
| Thickness | 2 mm to 3 mm (standard) |
| Operating Pressure | Up to 10 bar (150 psi) |
| Temperature Range | -10°C to 80°C (14°F to 176°F) |
| Application Areas | Water Supply, Chemical Lines, Industrial Pipelines |
| Standards Compliance | ISO, DIN, ASTM |
Reliable Sealing: Prevents fluid or gas leakage at flange joints.
Chemical Resistance: Compatible with acids, alkalis, and various corrosive fluids.
Flexible & Resilient: Accommodates minor surface irregularities and misalignments.
Easy Installation: Fits standard flange faces without the need for complex tools.
Wide Compatibility: Suitable for use with UPVC, CPVC, and other thermoplastic piping systems.
Long Service Life: Withstands pressure and temperature variations without degradation.
Standard Pressure Classes
| Pressure Class / PN | Maximum Working Pressure @ 20 °C | Remarks |
| PN6 | 6 bar (0.6 MPa) | Low-pressure systems, domestic water |
| PN10 | 10 bar (1.0 MPa) | Most common for irrigation and chemical |
| PN16 | 16 bar (1.6 MPa) | Industrial applications, higher-pressure lines |
Temperature Derating
| Temperature (°C) | Allowable Pressure (% of PN) |
| 20 | 100% |
| 30 | ~80% |
| 40 | ~65% |
| 50 | ~50% |
| 60 | ~40% |
| Property | Typical Value | Remarks |
| Material | EPDM / Neoprene / Rubber | Most commonly used with UPVC flanges |
| Density | 1.1 – 1.4 g/cm³ | Depends on elastomer type |
| Colour | Black / Red / Grey | Manufacturer dependent |
| Surface Finish | Smooth / Slightly textured | Improves sealing |
| Hardness | 60 – 70 Shore A | Optimal balance of flexibility and strength |
| Tensile Strength | 7 – 12 MPa | EPDM typical |
| Elongation at Break | 250 – 400 % | High elasticity |
| Compression Set | ≤ 30 % | Low permanent deformation |
| Resilience | High | Maintains seal under pressure |
| Water Absorption | < 1 % | Negligible swelling |
| Operating Temp. Range | –20 °C to 120 °C | EPDM standard |
| Thermal Conductivity | ~0.25 W/m·K | Low heat transfer |
| Electrical Conductivity | Non-conductive | Electrically insulating |
| UV & Weather Resistance | Good | Suitable for outdoor use |
| Chemical Resistance | Excellent for water, acids, and alkalis | Avoid hydrocarbons/solvents |
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 Gasket
Flat Ring Gasket (Standard Flat Gasket)
- Shape: Flat, circular ring
- Use: Most common for uPVC flange sealing
- Material: EPDM, Neoprene, or Rubber
- Feature: Covers full flange face for uniform sealing
O-Ring Gasket
- Shape: Circular cross-section (round)
- Use: Provides compression sealing in grooves or sockets
- Material: EPDM or Silicone
Feature: Excellent for tight flange joints, prevents leakage
Spiral Wound Gasket (Rare in uPVC systems)
- Shape: Metal + filler combination wound in a spiral
- Use: Occasionally used for industrial PVC-compatible systems
Feature: High pressure and temperature resistance (mostly metal-reinforced)
Braided/Compressed Sheet Gasket
- Shape: Cut from a flat sheet
- Material: Rubber or elastomer sheets
- Use: Custom sizes for irregular flanges or pipe adaptors
- Feature: Flexible, can be cut to match bolt pattern
Rubber-Coated UPVC Gasket
- Shape: Flat or O-ring
- Use: Provides better chemical resistance and durability
- Feature: Combines uPVC rigidity with rubber sealing properties
Types of UPVC Gaskets
Rubber Gaskets
Rubber gaskets are one of the most commonly used types of gaskets. They are highly versatile and can be used in various applications, including automotive, chemical, and manufacturing. Rubber gaskets are made from materials such as neoprene, nitrile, and EPDM (Ethylene Propylene Diene Monomer).
2. Cork Gaskets
Cork gaskets are typically used in low-pressure applications and are popular in industries like automotive and machinery. They are made from compressed cork and rubber or other binders.
3. Metal Gaskets
Metal gaskets are made from a combination of metals and are ideal for high-temperature and high-pressure applications. They are often used in industries such as aerospace, automotive, and chemical processing.
4. Spiral Wound Gaskets
A spiral wound gasket consists of a combination of metal and filler material that is wound into a spiral shape. These gaskets are highly effective for sealing in environments where high pressure or temperature is involved.
5. PTFE Gaskets
PTFE (Polytetrafluoroethylene) gaskets are made from a fluoropolymer material known for its non-stick, chemical-resistant properties. They are ideal for industries that require sealing against harsh chemicals and extreme temperatures.
Why Choose Petron Thermoplast ?
Petron Thermoplast is a trusted manufacturer and supplier of high-quality UPVC gaskets, engineered to deliver reliable flow control in demanding industrial environments. Our gasket is designed to meet international standards while offering long-term performance and cost efficiency.
1. Premium-Grade UPVC Material
Petron Thermoplast is a trusted manufacturer and supplier of high-quality UPVC gaskets, engineered to deliver reliable flow control in demanding industrial environments. Our gasket is designed to meet international standards while offering long-term performance and cost efficiency.
2. Robust & Leak-Proof Design
Petron Thermoplast UPVC Gasket features precision-engineered discs, high-performance elastomer seals, and rigid valve bodies, ensuring bubble-tight shut-off and consistent operation under pressure.
3. Smooth Operation & Low Torque
Our gaskets are designed for low operating torque, allowing smooth manual, gear-operated, pneumatic, or electric actuation. This reduces actuator wear and improves overall system efficiency.
4. Low Maintenance & Long Service Life
UPVC construction eliminates corrosion, scaling, and rust, significantly reducing maintenance requirements and extending valve lifespan compared to metal alternatives.
UPVC Pipe Fittings
We offer UPVC Pipe Fittings products in all standard sizes and provide complete customization options to meet your specific project requirements across our entire product range.
