PTFE has excellent dielectric properties and provides excellent thermal insulation properties, and the operating temperature range is -400°F to 500°F. PTFE is the most chemically resistant plastic known and is not affected by most corrosive liquids, vapours and gases. PTFE is usually offered in thicknesses ranging from .002″ to .250″ and meets FDA and AMS specifications, making it acceptable for the medical and food production industries.
In a strong chemical environment, contamination of the medium is not allowed, and the use of standard gaskets is very complicated. Here PTFE gasket is used as a flange gasket connection. For example, in the (petro) chemical industry, in the process industry. The PTFE gasket is also very suitable for applications in the food industry. PTFE is physiologically inactive and can be used in direct contact with food.
Weiten supplies expanded PTFE gasket, modified PTFE gasket, PTFE bonded EPDM gasket, pure PTFE gasket.
Pure PTFE Gasket is molded or skived or cut from virgin PTFE sheets, rods, tube or compounds etc. It has the best chemical corrosion resistance among known plastics.
Without being aging, lowest friction coefficient, wear resistance. The unloaded operating temperature range is -180~+260C.
Expanded PTFE Gasket is cut from Expanded PTFE gasket sheet, our expanded PTFE gasket sheet made with only pure PTFE resins.
It is suitable for use in steel flanges as well as flanges where a highly compressible gasket is required. Expanded PTFE Gasket is also suitable for sealing flanges with irregular surfaces. It will not exhibit the cold flow problems associated with virgin PTFE or the hardness problems of some other filled PTFE products. It has excellent sealability, cuts easily, and separates cleanly from flanges after use.
| PROPERTY | STANDARD | VALUE |
|---|---|---|
| Color | - | White |
| Density | ASTM D792 | 0.75-0.95g/cm³ |
| Operating temperatures | - | -286 – 320°C |
| Compressibility | ASTM F36 | 45% |
| Recovery | ASTM F36 | 12 -13% |
| Creep Relaxation | ASTM F38 | 35 – 36 % |
| Sealability (Nitrogen) | ASTM F 37B | 0.15 ml / hr |
| Sealability (Fuel A) | ASTM F 37B | 0.02 ml / hr |
| Service Pressure | - | Full Vaccum to 19 MPa |
| Tensile Strength Both directions | ASTM D638 | 19.6 MPa |
The Modified PTFE for use as a gasket material with strong chemical resistance properties and designed for severe chemical service, color-coded for easy identification, superior seal-ability, which helps reduce process and media loss as well as fugitive emissions, reduced creep, and cold flow characteristics.
The different combination offers a variety of different properties as the following sheet.
| Filler | Improved properties |
|---|---|
| Glass | Enhance wear resistanceChemical resistance |
| Graphite | Extremely low coefficient of frictionFairly good compressive strength |
| Carbon | Good thermal resistanceResistance to deformation |
| Bronze | Enhanced compressive strengthGood wear resistance |
| High thermal conductivity |
PTFE Bonded EPDM gasket is produced with high-quality EPDM rubber and PTFE for maximum chemical and corrosion resistance. They are suitable for fiberglass, glass-lined, and steel full-face flanges. The gaskets have Low bolt torque with superior sealing, Dual, Concentric, Convex sealing rings;
They will eliminate cracked flanges, reducing installation costs, while maintaining high performance. It is ideal for plastic piping systems, as well as metal or plastic-lined metal systems. Standards: ASME (ANSI) B16.5, JIS 10K, DIN2501 PN10/PN16, SABS1123, BS4504 etc
| 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 | Superior Quality PTFE bonded with EPDM Rubber |
| Application | Excellent corrosion resistance to all chemicals |
| PTFE Bonded EPDM Gasket ANSI Standard (Class150) | |||||
|---|---|---|---|---|---|
| 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 |
| 100 (4) | 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 |
MOBILE / WHATSAPP86-18561739639
ADDRESSNo.27, Baoyuan Rd, Gaoxin District, Qingdao,China.
WEITEN GROUP
Copyright © 2024 by WEITEN GROUP All Rights Reserved Designed by HUISHANG MEDIA
