A full-face PTFE-bonded EPDM gasket is a gasket in which a layer of PTFE (polytetrafluoroethylene) is laminated or bonded onto an EPDM (ethylene-propylene diene rubber) core, and the overall gasket is fabricated to cover the entire face of the flange (i.e., full-face style). The EPDM rubber provides the compressibility and sealing resilience, while the PTFE provides the chemical resistance at the sealing faces.
Key Features & Benefits
- Excellent Chemical Resistance: The PTFE layer provides superior resistance to acids, bases, solvents, and aggressive chemicals.
- Low Bolt-Torque Sealing: The bonded laminate construction with raised sealing rings ensures effective sealing at significantly lower flange bolt loads compared to flat rubber gaskets.
- Resilience & Recovery: The EPDM core offers strong compression recovery, accommodating flange surface variations and maintaining seal integrity under thermal or pressure fluctuations.
- Wide Temperature Range: Suitable for continuous use from –30 °C (–22 °F) to +150 °C (+302 °F), depending on grade.
- Full-Face Design: Distributes load evenly across the flange, protecting fragile materials (e.g., glass-lined or FRP flanges) from cracking and bolt-load concentration.
- Concentric Sealing Rings: Molded convex rings around bolt holes enhance sealing performance at low torque for both gas and liquid applications.
- Bonded Construction: PTFE is permanently laminated or vulcanized to the EPDM core, forming a durable composite structure that will not delaminate in service.
We can make the full-face PTFE-bonded EPDM gasket according to ASME (ANSI) B16.5, EN1514-1.
Technical Data:
| Gasket Standard |
ASME B16.21 Class 150# |
| Dimension: |
ANSI B16.5 Drilling |
| Pressure: |
150PSI Plus |
| Temperature: |
-30°C –150°C |
| Size |
1/2″ (DN15) to 16″ (DN400) |
| Materials: |
Quality PTFE bonded with EPDM Rubber |
| Application: |
Excellent corrosion resistance to all chemicals |
Specifications:
| PTFE Bonded EPDM Gasket ANSI Standard (Class 150) |
| Size |
D1 |
D2 |
n |
L |
K |
| 15 (1/2） |
22 |
90 |
4 |
16 |
60.5 |
| 20 (3/4） |
27 |
100 |
4 |
16 |
70 |
| 25 (1) |
34 |
110 |
4 |
16 |
79.5 |
| 32 (1 1/4) |
43 |
120 |
4 |
16 |
89 |
| 40 (1 1/2) |
49 |
130 |
4 |
16 |
98.5 |
| 50 (2) |
61 |
150 |
4 |
18 |
120.5 |
| 65 (2 1/2) |
77 |
180 |
4 |
18 |
139.5 |
| 80 (3) |
89 |
190 |
4 |
18 |
152.5 |
| 100 (4) |
115 |
230 |
8 |
18 |
190.5 |
| 125 (5) |
140 |
255 |
8 |
2 |
216 |
| 150 (6) |
169 |
280 |
8 |
22 |
241.5 |
| 200 (8) |
220 |
345 |
8 |
22 |
298.5 |
| 250 (10) |
273 |
405 |
12 |
26 |
362 |
| 300 (12) |
324 |
485 |
12 |
26 |
432 |
| 350 (14) |
356 |
535 |
12 |
29.5 |
476 |
