Contact us

Manufacture, process and supply plastic, insulation and rubber products to industry

www.par-group.co.uk
Preston (Head office): +44 (0) 1257 248369:
Manchester: +44 (0) 1706 363790

  1. Home
  2. Sealing & Jointing
  3. O-Rings and Mechanical Seals
  4. PTFE Encapsulated O-Rings
Back to search results

PTFE Encapsulated O-Rings

PTFE Encapsulated O-Rings  How to Measure and O-ring

PTFE encapsulated O-Rings are designed to combine the sealing properties of the rubber O-ring with the chemical resistance of Teflon® PTFE. They are generally manufactured from Viton® or silicone rubber and are coated in a thin moulded layer of Teflon FEP or PFA. This provides a unique seal popular for high friction and aggressive chemical applications. FEP encapsulated O-rings are our most common and are resistant to solvents and chemicals (except for alkali metals, fluorine and some halogenated compounds at high temperatures). They have a low coefficient of friction and a very low permeability to gases making them suitable for harsh environments. PTFE encapsulated O-rings also have a good elastomeric memory. We can also supply rigid Teflon® PTFE O-rings which have a high compression set.

Key Features

  • Temperature (FEP Encapsulated O-Rings): -60°C to +205°C (260°C short term).
  • Temperature (PFA Encapsulated O-Rings): -60°C to +260°C (300°C short term).
  • Shore Hardness (Silicone): 85-90°A
  • Shore Hardness (Viton®): 90-95°A
  • Shore Hardness (Hollow Silicone): 75-80°A

Availability

Note: Below are our most common sizes, many others can be manufactured upon request.

Cross Section Diameter (mm) Inside Diameter - Silicone (mm) Inside Diameter - Viton® (mm)
1.50* 12.00 12.00
1.60* 7.20 7.20
1.78 11.00 11.00
1.78* 7.20 7.20
2.00 11.00 11.00
2.00* 7.20 7.20
2.40 12.00 12.00
2.40* 9.30 9.30
2.50 12.00 12.00
2.50* 9.30 9.30
2.62 13.50 13.50
2.62* 9.30 9.30
3.00 13.50 13.50
3.00* 10.00 12.00
3.15 13.50 13.50
3.15* 10.00 12.00
3.53 16.50 16.50
3.53* 12.00 12.00
3.80* 18.00 18.00
4.00 23.00 23.00
4.00* 18.00 18.00
4.30* 18.00 22.00
4.50 23.00 23.00
4.50* 18.00 22.00
4.75* 19.00 22.00
5.00 25.00 25.00
5.00* 19.00 22.00
5.33 25.00 25.00
5.33* 20.00 20.00
5.50 27.00 27.00
5.50* 25.00 27.00
5.70 27.00 27.00
5.70* 25.00 27.00
6.00 28.00 28.00
6.00* 25.00 27.00
6.30 28.00 28.00
6.30* 27.00 28.00
6.44* 28.00 35.00
6.99 32.00 39.00
6.99* 32.00 39.00
7.50* 50.80 60.00
8.00 65.00 25.00
8.00* 50.80 60.00
8.40 98.00 98.00
8.40* 50.80 70.00
9.00 70.00 70.00
9.00* 50.80 70.00
9.50 75.00 75.00
9.50* 50.80 73.00
10.00 85.00 85.00
10.00* 57.00 74.00
11.00 98.00 98.00
11.00* 70.00 98.00
12.00 100.00 100.00
12.00* 70.00 100.00
12.70 150.00 150.00
12.70* 70.00 102.00
14.00* 130.00 130.00
15.00* 177.80 177.80
16.00 203.20 -
16.00* 177.80 177.80
18.00* 177.80 177.80
19.00* 203.20 203.20
20.00* 203.20 203.20
25.40* 228.00 -
31.75* 232.00 -

*Special production sizes - may be subject to increased lead times and minimum order quantities.

Teflon™ and Viton® are registered trademarks of The Chemours Company.

Related Products

Rubber O-Ring Cord
Silicone Rubber Cord
Neoprene Sponge O-Ring Cord
Silicone Sponge Cord