PTFE Machined Components

Properties

PTFE Machined Components such as Valves Seat Rings, Roof Packings, Seal Cover, Plug Valve Sleeve, Wedge Rings, ‘O’ Rings, Washers, Bearings, Balls, Bushings, Insulators, Pipe Joints, Guides, Beakers, Pistons Rings, Rider Rings, Hydraulic Earth Mover Seal etc., and all types of components for non lubricated compressors or any PTFE components as per customer’s sample, specification and diagram.

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	%	ASTM D-621	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