PTFE MATERIAL TUBES

PTFE-4

PTFE-4 MATERIAL TUBES

COLOR – DARK GREY PTFE-4 (CARBON FILLED PTFE)

PTFE-4 is a specialized carbon-filled PTFE material (coke-filled polytetrafluoroethylene) designed for demanding industrial applications where high strength, low friction, and exceptional chemical resistance are required. The addition of carbon filler significantly enhances the material’s mechanical strength, wear resistance, and dimensional stability, making PTFE-4 an excellent choice for heavy-duty seals, bearings, and sliding elements.

With an extremely wide operating temperature range from –200 °C to +260 °C, PTFE-4 is suitable for applications in both cryogenic and high-temperature environments. Thanks to its very low friction coefficient and non-stick surface, the material reduces energy losses, prevents adhesion, and ensures long-term reliability in aggressive chemical and mechanical conditions.

KEY ADVANTAGES OF PTFE-4

High mechanical strength

Carbon filler improves durability and wear resistance, extending the service life of seals, bushings, and guide rings.

Improved creep resistance (cold flow)

Compared to virgin PTFE (PTFE-1), PTFE-4 demonstrates lower deformation under continuous load, making it ideal for heavy-duty equipment.

Wide operating temperature range

Stable performance between –200 °C and +260 °C in extreme cold and hot environments.

Low friction coefficient

Excellent sliding properties reduce energy consumption and heat generation, ensuring efficient performance.

Non-stick surface

Prevents contamination and sticking, ideal for industrial machinery and chemical processing equipment.

Chemical resistance

PTFE-4 maintains stability in contact with most acids, alkalis, fuels, and solvents, ensuring safe use in aggressive environments.

Applications

Heavy-duty bearings, bushings, and guide rings
Sealing elements for pumps, compressors, and valves
Components for oil & gas and chemical industries
Sliding parts in hydraulic and pneumatic systems
Applications with continuous high loads and friction

Resistance PTFE-4 materials

Good resistance

Mineral oils, fuels, lubricants

Organic solvents (ketones, esters, alcohols)

Water and steam up to +260 °C

Lubricants, hydraulic fluids

Cryogenic fluids

Average resistance

Concentrated acids at high temperature

Strong oxidizers

–

Low resistance

Molten alkali metals

Elemental fluorine above 200 °C

–

PTFE-4 Material Data Sheet

Properties

Value

Unit

Standard

Hardness:

60-65

Shore A

ASTM D2240

Density:

2,05 – 2,11

g/cm³

ASTM D792

Tensile strength:

15 – 20

N/mm²

ISO 12086 ISO 527

Elongation at break:

150 – 200

ISO 12086 ISO 527

Compressive strength at 1% deformation

4,5-6,5

N/mm²

ASTM D695

Deformation under load at room temperature 24 hours at 13,7 N/mm2

2,5 – 4

ASTM D621

Permanent deformation as above after 24 hours of rest atroom temperature

2,5 – 4

ASTM D621

Coefficient of Linear Expansion ( 25° – 100°C )

12 – 13

10-5(mm/mm)/ °C

ASTM D696

Min. service temperature:

– 200

°C

–

Max. service temperature (short term):

+ 260

°C

–

All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.

TEST ALPANA QUALITY

We take pride in our seal-making raw materials and are ready to offer samples of our semi-finished products. For testing, we provide our most popular materials, including the Max series of polyurethanes: H-Pur, SH-Pur, XSH-Pur, XH-Pur—as well as rubber bushings: NBR, FKM, H-NBR, EPDM, and MVQ!