Find the right PTFE O-ring

Product		Dimensions	Material	Hardness (Shore A)	Certification	Stock	From price
	O-ring White	240.67 mm x 6.99 mm	PTFE – Teflon	Shore A	FDA	5	€ 98,61
	O-ring White	304.17 mm x 5.33 mm	PTFE – Teflon	Shore A	FDA	1	€ 134,94
	O-ring White	5 mm x 1.75 mm	PTFE – Teflon	Shore A	FDA	848	€ 0,93
	O-ring White	6 mm x 1 mm	PTFE – Teflon	Shore A	FDA	151	€ 0,89
	O-ring White	6.3 mm x 2.4 mm	PTFE – Teflon	Shore A	FDA	694	€ 0,88
	O-ring White	56.52 mm x 5.33 mm	PTFE – Teflon	Shore A	FDA	86	€ 9,08
	O-ring White	22 mm x 3 mm	PTFE – Teflon	Shore A	FDA	227	€ 2,31
	O-ring White	22.5 mm x 2.5 mm	PTFE – Teflon	Shore A	FDA	233	€ 2,17
	O-ring White	186 mm x 3 mm	PTFE – Teflon	Shore A	FDA	12	€ 43,35
	O-ring White	7.5 mm x 2.5 mm	PTFE – Teflon	Shore A	FDA	821	€ 0,88
	O-ring White	8 mm x 1.5 mm	PTFE – Teflon	Shore A	FDA	654	€ 1,06
	O-ring White	210 mm x 5 mm	PTFE – Teflon	Shore A	FDA	4	€ 67,46
	O-ring White	219.5 mm x 3 mm	PTFE – Teflon	Shore A	FDA	9	€ 62,68
	O-ring White	136 mm x 5 mm	PTFE – Teflon	Shore A	FDA	3	€ 34,64
	O-ring White	221.62 mm x 5.33 mm	PTFE – Teflon	Shore A	FDA	16	€ 67,46
	O-ring White	65 mm x 5 mm	PTFE – Teflon	Shore A	FDA	25	€ 11,44
	O-ring White	67 mm x 3.5 mm	PTFE – Teflon	Shore A	FDA	58	€ 8,-
	O-ring White	22 mm x 1.5 mm	PTFE – Teflon	Shore A	FDA	471	€ 1,40
	O-ring White	19.2 mm x 3 mm	PTFE – Teflon	Shore A	FDA	201	€ 1,81
	O-ring White	91.67 mm x 3.53 mm	PTFE – Teflon	Shore A	FDA	153	€ 10,43
	O-ring White	32.7 mm x 3.53 mm	PTFE – Teflon	Shore A	FDA	148	€ 4,71
	O-ring White	205 mm x 5.3 mm	PTFE – Teflon	Shore A	FDA	8	€ 71,36
	O-ring White	215 mm x 5 mm	PTFE – Teflon	Shore A	FDA	9	€ 69,93
	O-ring White	216 mm x 3.5 mm	PTFE – Teflon	Shore A	FDA	4	€ 62,95
	O-ring White	225 mm x 3 mm	PTFE – Teflon	Shore A	FDA	8	€ 64,26
	O-ring White	32 mm x 2.5 mm	PTFE – Teflon	Shore A	FDA	114	€ 3,08
	O-ring White	3.7 mm x 1 mm	PTFE – Teflon	Shore A	FDA	778	€ 0,91
	O-ring White	354.97 mm x 6.99 mm	PTFE – Teflon	Shore A	FDA	2	€ 182,18
	O-ring White	196 mm x 4 mm	PTFE – Teflon	Shore A	FDA	10	€ 59,72
	O-ring White	204.2 mm x 5.7 mm	PTFE – Teflon	Shore A	FDA	6	€ 76,75
	O-ring White	15.6 mm x 1.78 mm	PTFE – Teflon	Shore A	FDA	4923	€ 0,93
	O-ring White	8 mm x 5 mm	PTFE – Teflon	Shore A	FDA	233	€ 2,41
	O-ring White	32 mm x 1.5 mm	PTFE – Teflon	Shore A	FDA	181	€ 2,27
	O-ring White	89.2 mm x 5.7 mm	PTFE – Teflon	Shore A	FDA	31	€ 21,57
	O-ring White	90 mm x 7 mm	PTFE – Teflon	Shore A	FDA	11	€ 32,52
	O-ring White	67 mm x 3 mm	PTFE – Teflon	Shore A	FDA	65	€ 7,53
	O-ring White	69 mm x 3 mm	PTFE – Teflon	Shore A	FDA	117	€ 7,90
	O-ring White	27.2 mm x 3 mm	PTFE – Teflon	Shore A	FDA	233	€ 2,83
	O-ring White	17.04 mm x 3.53 mm	PTFE – Teflon	Shore A	FDA	199	€ 1,88
	O-ring White	3 mm x 2.5 mm	PTFE – Teflon	Shore A	FDA	731	€ 0,88

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

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.   

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