Carbon-Graphite Seals, NTB Hitech Ceramics, India, TRIM Products Services


Carbon-Graphite Seals

NTB Hitech Ceramics

NTB LUBETUFF Carbon-Graphite Components

Carbon/Graphite a little known engineering material, is remarkably versatile and has a complex make-up. This gives it the desired and the rare combination of strength and lubricity. Mechanical carbon/graphite products manufactured by NTB HITECH CERAMICS include Trust Pads for Submersible Pumps, Seal Faces, Faces, Gland Rings, Vanes for Rotary Pumps, Metering Valves, Steam Joints, Piston Rings, Bearings etc

NTB has chosen Graphite with a high degree of crystallinity (treated at 2900°C). For best results, finished carbon/graphite materials often contain impregnates like resins, metals, and ceramics to add strength, increase thermal conductivity, and lower base porosity. Other impregnants include temperature stable inorganic salts to enhance oxidation resistance and film-forming characteristics.

Specifications of NTB LUBETUFF Carbon-Graphite Components

Description	Units	Specs.	Description	Units	Specs.
Carbon content	%	0 – 90%	Flexural Strength	psi	6000-9000
Electro Graphite	%	0 – 100%	Hardness shore D Scale	Shore D	90-100
Density	gm/cc	1.6 – 2.4	Average Crystal Size D50	micron	3-4
Porosity	---	Nil	Parallelism	micron	within 20
Tensile Strength	psi	8000-11000	Flatness	Light Bands	within 2
Compressive Strength	psi	15000-35000	Sur-finish on lapped face	μ- m	Ra < 0.3

Standard Properties of NTB LUBETUFF Carbon-Graphite Components

low wear rate & non welding
high strength at elevated temperature
low density & high thermal conductivity
high resistance to thermal shock
excellent dimensional stability
non-oxidizing up to 550°C in air-depending on the grade of carbon/graphite used
self lubricating & low friction
low modulus of elasticity
good hydro-mechanical bearing properties
good electrical conductivity
non contaminating & non swelling
easily machined to fine tolerances
High compressive strength & chemically inert

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