PTFE O-Rings - FDA

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The origin of PTFE Teflon®

Teflon O rings, a trademark of polytetrafluoroethylene (PTFE O-ring) is a chemical compound that was discovered in 1938 by Roy Plunkett in the Jackson Laboratory of the firm Dupont in the American state New Jersey.

At the time Plunkett applied for a patent on this substance, which was granted on 4 February 1941. Later in 1949 Teflon® was introduced as a commercial product.

Teflon® is often referred to as a spin-off of the American space program even though this material was brought to the market before this. The assumption that the spin-off originated from the Manhattan project is more likely.

The Manhattan project was the name of the very secret operation, led by the United States, with the help of Canada and the United Kingdom. With this project, the United States was able to develop the atomic bomb during the Second World War.

After the American Food and Drug Administration (FDA) did its research on Teflon®, it was approved for use in food preparation.

What is a PTFE Teflon® Oring?

Teflon is an ethylene polymer in which all hydrogen atoms are replaced by fluorine. The polymer has a very large length and is still one of the largest molecules. PTFE is a thermoplastic; however, it cannot be processed in a thermoplastic manner. PTFE is pressed as a powder at room temperature in a mold and then sintered in an oven.

What is PTFE Teflon® O-rings used for?

  • Food industry
  • (Petro)chemicals
  • Mechanics
  • Sprays for sealing and protection against rust and dust

The advantage of PTFE Teflon® O-ring:

  • Non-stick qualities
  • Excellent chemical resistance
  • Has a temperature working range up to +250 °C
  • Resistant against weather conditions

The disadvantages of PTFE O ring Teflon®:

  • Hardly meltable, so that conventional design techniques fall short
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ProductDimensionsMaterialHardness (Shore A)CertificationStockFrom price
O-ring White240.67x6.99 O-ring 240.67x6.99 - PTFE - Teflon - White - FDA - ER412996 Shore AFDA 6€ 119,32 icon
O-ring White304.17x5.33 O-ring 304.17x5.33 - PTFE - Teflon - White - FDA - ER413012 Shore AFDA 0€ 163,28 icon
O-ring White430.66x5.33 O-ring 430.66x5.33 - PTFE - Teflon - White - FDA - ER413032 Shore AFDA 2€ 260,20 icon
O-ring White5x1.75 O-ring 5x1.75 - PTFE - Teflon - White - FDA - ER492526 Shore AFDA 1090€ 2,25 icon
O-ring White6x1 O-ring 6x1 - PTFE - Teflon - White - FDA - ER492716 Shore AFDA 774€ 2,16 icon
O-ring White6.3x2.4 O-ring 6.3x2.4 - PTFE - Teflon - White - FDA - ER492811 Shore AFDA 892€ 2,12 icon
O-ring White56.52x5.33 O-ring 56.52x5.33 - PTFE - Teflon - White - FDA - ER1109 Shore AFDA 54€ 10,99 icon
O-ring White22x3 O-ring 22x3 - PTFE - Teflon - White - FDA - ER495561 Shore AFDA 304€ 5,58 icon
O-ring White22.5x2.5 O-ring 22.5x2.5 - PTFE - Teflon - White - FDA - ER495634 Shore AFDA 350€ 5,24 icon
O-ring White23.1x3 O-ring 23.1x3 - PTFE - Teflon - White - FDA - ER495726 Shore AFDA 318€ 5,79 icon
O-ring White186x3 O-ring 186x3 - PTFE - Teflon - White - FDA - ER504644 Shore AFDA 32€ 52,45 icon
O-ring White190x5.3 O-ring 190x5.3 - PTFE - Teflon - White - FDA - ER504747 Shore AFDA 10€ 74,90 icon
O-ring White196x7 O-ring 196x7 - PTFE - Teflon - White - FDA - ER504881 Shore AFDA 4€ 108,15 icon
O-ring White7.5x2.5 O-ring 7.5x2.5 - PTFE - Teflon - White - FDA - ER493053 Shore AFDA 785€ 2,12 icon
O-ring White8x1.5 O-ring 8x1.5 - PTFE - Teflon - White - FDA - ER493171 Shore AFDA 1450€ 2,56 icon
O-ring White210x5 O-ring 210x5 - PTFE - Teflon - White - FDA - ER505185 Shore AFDA 5€ 81,63 icon
O-ring White219.5x3 O-ring 219.5x3 - PTFE - Teflon - White - FDA - ER505382 Shore AFDA 12€ 75,85 icon
O-ring White136x5 O-ring 136x5 - PTFE - Teflon - White - FDA - ER503246 Shore AFDA 34€ 41,91 icon
O-ring White140x3.53 O-ring 140x3.53 - PTFE - Teflon - White - FDA - ER503370 Shore AFDA 10€ 36,66 icon
O-ring White221.62x5.33 O-ring 221.62x5.33 - PTFE - Teflon - White - FDA - ER326750 Shore AFDA 8€ 81,63 icon
O-ring White63x5.3 O-ring 63x5.3 - PTFE - Teflon - White - FDA - ER499370 Shore AFDA 74€ 14,47 icon
O-ring White65x5 O-ring 65x5 - PTFE - Teflon - White - FDA - ER499504 Shore AFDA 105€ 13,84 icon
O-ring White67x3.5 O-ring 67x3.5 - PTFE - Teflon - White - FDA - ER499601 Shore AFDA 100€ 9,68 icon
O-ring White20.9x2.5 O-ring 20.9x2.5 - PTFE - Teflon - White - FDA - ER495399 Shore AFDA 315€ 4,54 icon
O-ring White21.4x2.4 O-ring 21.4x2.4 - PTFE - Teflon - White - FDA - ER495469 Shore AFDA 367€ 4,39 icon
O-ring White21.1x2.5 O-ring 21.1x2.5 - PTFE - Teflon - White - FDA - ER495436 Shore AFDA 315€ 4,62 icon
O-ring White22x1.5 O-ring 22x1.5 - PTFE - Teflon - White - FDA - ER495548 Shore AFDA 98€ 3,38 icon
O-ring White12.37x3.53 O-ring 12.37x3.53 - PTFE - Teflon - White - FDA - ER494021 Shore AFDA 390€ 5,16 icon
O-ring White12.7x2.39 O-ring 12.7x2.39 - PTFE - Teflon - White - FDA - ER494080 Shore AFDA 600€ 3,08 icon
O-ring White18.8x1.8 O-ring 18.8x1.8 - PTFE - Teflon - White - FDA - ER495075 Shore AFDA 3202€ 3,23 icon
O-ring White19.2x3 O-ring 19.2x3 - PTFE - Teflon - White - FDA - ER495156 Shore AFDA 335€ 4,39 icon
O-ring White29.2x3 O-ring 29.2x3 - PTFE - Teflon - White - FDA - ER288765 Shore AFDA 1976€ 3,74 icon
O-ring White91.67x3.53 O-ring 91.67x3.53 - PTFE - Teflon - White - FDA - ER288801 Shore AFDA 141€ 12,62 icon
O-ring White32x1.6 O-ring 32x1.6 - PTFE - Teflon - White - FDA - ER496803 Shore AFDA 309€ 5,85 icon
O-ring White32.7x3.53 O-ring 32.7x3.53 - PTFE - Teflon - White - FDA - ER496895 Shore AFDA 190€ 5,69 icon
O-ring White205x5.3 O-ring 205x5.3 - PTFE - Teflon - White - FDA - ER505073 Shore AFDA 10€ 86,34 icon
O-ring White215x5 O-ring 215x5 - PTFE - Teflon - White - FDA - ER505281 Shore AFDA 6€ 84,61 icon
O-ring White216x3.5 O-ring 216x3.5 - PTFE - Teflon - White - FDA - ER505311 Shore AFDA 5€ 76,17 icon
O-ring White225x3 O-ring 225x3 - PTFE - Teflon - White - FDA - ER505481 Shore AFDA 10€ 77,75 icon
O-ring White8x2.02 O-ring 8x2.02 - PTFE - Teflon - White - FDA - ER493179 Shore AFDA 0€ 2,69 icon

Polytetrafluoroethylene (PTFE)  

MATERIAL DESCRIPTION:

Polytetrafluoroethylene (PTFE) is a high molecular weight polymer, one of the most versatile plastic materials known and useful for a large range of products for applications excluded to other materials.   

PTFE is generally considered a thermoplastic polymer; at 327°C (620.6°F) it retains a very high viscosity, thus requiring particular transformation techniques for manufacturing of finished and semi‐finished goods. PTFE can be used in a temperature range from ‐200°C (‐328°F) to +260°C (500°F).  

OUTSTANDING CHARACTERISTICS:

  • High heat resistance
  • High resistance to chemical agents and solvents
  • High anti‐adhesiveness 
  • High dielectric properties
  • Low friction coefficient
  • Non‐toxicity

THERMAL PROPERTIES:

PTFE is one of the most thermally stable plastic materials. There is no appreciable decomposition at 260°C (500°F), so that PTFE, at this temperature, still possesses the greater part of its properties. Appreciable decomposition begins at over 400°C (932°F).  The coefficient of the thermal conductivity of PTFE does not vary with the temperature. It is relatively high, so that PTFE can be considered to be a good insulating material. The mixing of suitable fillers improves the thermal conductivity.