PVDF Blind Flange
PVDF blind flanges have the characteristics of stability of fluoropolymers when exposed to harsh chemical and ultraviolet environments, but they are so much stronger mechanically than PTFE or PFA polymers. PVDF blind flanges also excel in high-purity and low-permeability applications such as pharmaceutical and semiconductor processing.
The PVDF Blind Flange is a critical pipe fitting used to securely seal the end of a PVDF piping system or close a section of pipe for maintenance or safety purposes. Made from high-quality Polyvinylidene Fluoride (PVDF), this flange offers outstanding chemical resistance, mechanical strength, and thermal stability. It is widely used in industries such as chemical processing, pharmaceuticals, semiconductor manufacturing, and oil and gas treatment, where leak-proof sealing and corrosion resistance are essential.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
PVDF Blind Flange Details
d – Bolt Circle Diameter
DN – Nominal Diameter
B – Flange Outer Diameter
P – Bolt Hole Pitch Circle Diameter
L – Flange Thickness
c – Bolt Hole Diameter
No. Holes – Number of Bolt Holes
| d (mm) | DN (mm) | B (mm) | P (mm) | L (mm) | c (mm) | No. of Holes |
| 20 | 15 | 12 | 65 | 14 | 28 | 4 |
| 25 | 20 | 12 | 75 | 14 | 34 | 4 |
| 32 | 25 | 16 | 85 | 14 | 42 | 4 |
| 40 | 32 | 16 | 100 | 18 | 51 | 4 |
| 50 | 40 | 16 | 110 | 18 | 62 | 4 |
| 63 | 50 | 16 | 125 | 18 | 78 | 4 |
| 75 | 65 | 18 | 145 | 18 | 110 | 4 |
| 90 | 80 | 18 | 160 | 18 | M16 | 8 |
| 110 | 100 | 20 | 180 | 18 | M16 | 8 |
| Parameter | Specification / Description |
| Material | Polyvinylidene Fluoride (PVDF) |
| Flange Type | Blind Flange (Solid / No Bore) |
| Manufacturing Method | Injection molded / Machined |
| Nominal Size (DN / NB) | DN15 to DN300 (½” to 12”) |
| Pressure Rating | PN10, PN16 (as per standard & size) |
| Temperature Range | −40°C to +120°C |
| Standard Compliance | DIN, ANSI, ASTM, ISO |
| Flange Face | Flat Face (FF) |
| Bolt Holes | As per DIN / ANSI drilling |
| Color | Natural / White (standard) |
| Operating Medium | Acids, Alkalis, Solvents, Ultra-pure fluids |
| Chemical Resistance | Excellent (strong acids, halogens, solvents) |
| Corrosion Resistance | Complete resistance to rust and scaling |
| UV Resistance | Excellent |
| Thermal Conductivity | ~0.19 W/m·K |
| Density | ~1.78 g/cm³ |
| Electrical Properties | Electrically non-conductive |
| Installation | Bolted to the mating flange with a gasket |
| Weight | Lightweight compared to metal blind flanges |
| Maintenance | Maintenance-free |
| Service Life | Long, even in aggressive environments |
- Manufactured from PVDF (Polyvinylidene Fluoride)
High-performance fluoropolymer with excellent mechanical and chemical properties. - Excellent Chemical Resistance
Resistant to strong acids, alkalis, solvents, and halogenated media. - High Temperature Resistance
Continuous operating temperature up to 120°C. - Corrosion-Free Construction
Completely immune to rust, pitting, and galvanic corrosion. - High Mechanical Strength
Superior strength compared to PP and uPVC blind flanges. - Flat Face Sealing Surface
Ensures reliable gasket sealing and leak-proof performance. - Lightweight Design
Easier handling and installation than metallic blind flanges. - High Purity & Non-Contaminating
Suitable for pharmaceutical, semiconductor, and ultrapure chemical systems. - Excellent UV & Weather Resistance
Suitable for indoor and outdoor installations. - Low Thermal & Electrical Conductivity
Provides thermal insulation and electrical safety. - Maintenance-Free Operation
No painting, coating, or corrosion protection required. - Standardized Dimensions
Available as per DIN, ANSI, and ISO standards. - Long Service Life
Maintains performance in aggressive environments over extended periods.
| Temperature (°C) | PN10 Rating (bar) | PN16 Rating (bar) |
| 20°C | 10 bar | 16 bar |
| 30°C | 9 bar | 14 bar |
| 40°C | 8 bar | 12 bar |
| 50°C | 7 bar | 10 bar |
| 60°C | 6 bar | 8 bar |
| 70°C | 5 bar | 7 bar |
| 80°C | 4 bar | 6 bar |
| 90°C | 3 bar | 5 bar |
| 100°C | 2 bar | 4 bar |
| 110°C | – | 3 bar |
| 120°C | – | 2 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 PVDF Blind Flange
Excellent Chemical Resistance
Resistant to strong acids, alkalis, solvents, and halogens, making it ideal for highly corrosive services.
High Temperature Capability
Performs reliably up to 120°C, higher than PP and uPVC alternatives.
Corrosion-Free Material
Completely immune to rust, pitting, scaling, and galvanic corrosion.
Excellent UV Resistance
Suitable for both indoor and outdoor installations without degradation.
High Purity & Non-Contaminating
Suitable for pharmaceutical, semiconductor, and ultrapure chemical systems.
Lightweight Construction
Significantly lighter than metal blind flanges, reducing handling and installation effort.
Long Service Life
Maintains mechanical strength and chemical resistance over extended operating periods.
Low Maintenance
No coating, painting, or corrosion protection required
Thermal & Electrical Insulation
Low thermal conductivity and electrically non-conductive material enhance safety.
Easy Installation
Compatible with standard DIN / ANSI / ISO bolt patterns.
Leak-Proof Sealing
Flat-face design ensures effective gasket sealing.
Cost-Effective Over Lifecycle
Lower maintenance and replacement costs compared to metal flanges in corrosive environments.
Types of PVDF Blind Flange
1. Standard PVDF Blind Flange
- Solid flange without bore
- Used to close pipe ends or spare nozzles
- Manufactured as per DIN / ISO / ANSI standards
2. Injection-Moulded PVDF Blind Flange
- Produced by injection moulding
- Uniform thickness and smooth finish
- Suitable for standard pressure applications
3. Machined (Solid) PVDF Blind Flange
- CNC-machined from PVDF solid rods or sheets
- Higher dimensional accuracy
- Preferred for high-pressure or critical services
4. DIN Standard PVDF Blind Flange
- Bolt drilling as per DIN PN10 / PN16
- Commonly used in European piping systems
5. ANSI Standard PVDF Blind Flange
- Bolt drilling as per ANSI Class 150
- Widely used in US and international projects
6. ISO Standard PVDF Blind Flange
- Manufactured according to ISO flange dimensions
- Ensures global compatibility
7. Raised-Face (RF) PVDF Blind Flange (Special)
- Raised sealing face for improved gasket compression
- Available on request for specific applications
8. Custom / Special PVDF Blind Flange
- Custom thickness, bolt pattern, or OD
- Designed for high temperature, vacuum, or chemical duty
Why Choose Petron Thermoplast?
At Petron Thermoplast, we specialize in manufacturing precision-engineered PVDF blind flanges according to global standards.
Our advantages include:
Accurate machining and flat sealing faces
Full range from Class 150 to Class 2500
Materials certified to ASTM, EN, and ISO standards
Optional RTJ, FF, or RF face types
Quick delivery and custom production
Whether for a large infrastructure project or a small-scale pipeline system, Petron Thermoplast is your trusted partner for high-quality PVDF blind flanges.
