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PTFE Machined Components

PTFE Machined Components

PTFE machined components such as valves seat rings, roof packing, seal cover, plug valves sleeve, wedge rings, ‘O’ rings, piston rings, washers, bearings, balls, bushings, insulators, pipe joints, guides, breaks, piston rings, rider rings, hydraulic earth mover seals etc., and all types of components for non-lubricates compressors or any PTFE components as per customer’s sample, specification and drawing.

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Properties

Note :
1. Data quoted are average values & may vary with source and grade of raw material.
2. Values may be used for design with consideration of factor of safety.
3. Company do not accepts any responsibility of results obtained and infringement of any patents.
Property Unit Test Method Virgin PTFE 25% Glass Filled PTFE 15% Glass +5%MoS2 Filled PTFE 25% Carbon Filled PTFE 15% Graphite Filled PTFE 40% Bronze Filled PTFE
PHYSICAL
Density gm/cm³ ASTM D-792 2.1 - 2.2 2.24 - 2.25 2.23 - 2.24 2.12 - 2.14 2.14 - 2.16 3.1 - 3.2
Water Absorption 24 hrs (%) ASTM D-570 <0.01 0.013 0.015 0.05 0 0
MECHANICAL
Tensile Strength kgf/cm² ASTM D-638 210 - 350 125 - 200 150 - 220 120 - 155 150 - 200 125 - 150
Elongation of Break % ASTM D-638 250 - 400 200 - 300 220 - 320 100 - 150 175 - 225 100 - 175
Compressive Strength kgf/cm² ASTM D-695 40 - 50 75 - 85 65 - 75 75 - 85 65 - 75 85 - 100
Compressive Modulus kgf/cm² ASTM D-695 4000 7000 6000 8400 8000 8500
Deformation under load
A. 24 Hrs. 23°C 113 kg/cm² % ASTM D-621 15 11 12 7 8 6
B. 2 Hrs. 150°C 113 kg/cm² 55 50 50 35 43 42
Flexural Strength kgf/cm² ASTM D-790 57 42 50 96 60 85
Flexural Modulus kgf/cm² ASTM D-790 3500-6300 16700 20000 11900 11000 14000
Impact Strength (+20°C) cmkgf/cm² ASTM D-256 15 11 12 10 14 9
Hardness Shore-D ASTM D-2240 52 - 58 58 - 63 60 - 65 60 - 65 60 - 65 63 - 68
Co-efficient of Friction
A. Dynamic P-7 kg/cm² V-0.5 m/s - - - - - - 0.04 - 0.06 0.5 - 0.54 0.15 - 0.20 0.12 - 0.17 0.11 - 0.16 0.11 - 0.15
B. Static P-35 kg/cm² 0.05 - 0.08 0.11 - 0.13 0.08 - 0.01 0.09 - 0.11 0.08 - 0.10 0.08 - 0.10
Brittleness Temp. at Atm. Pressure °C - - - -200
THERMAL
Melting Temperature °C ASTM D-3418 335
Use Temp. at Atm. Pressure °C - - - -250 to +260
Thermal Conductivity 10-4cal/cm S°c Cenco Fitch 6 9 9 13 14 17
ELECTRICAL
Dielectric Strength Kv/mm ASTM D-149 24 12 16 2 2 Conductive