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Grafseal Products
Grafseal Products
Apollo Gaskets & Engineering offers a range of Grafseal products, viz., gaskets, packings and seals. Grafseal withstands temperatures from -200°C to +600° in oxidising media and up to 3000°C in reducing or inert atmospheres. Its sublimation temperature is 3650°C. It will not melt or support combustion. No other self-lubricating material has this range of thermal properties as Grafeseal. Salient features: Pressure resistance – can be used safely for pressures up to 300 kg/cm; Chemical resistance – seals against liquids and gases is unaffected by organic and inorganic acids, solvents, alkalies, hot waxes and oils, with a few exceptions; Corrosion resistance – seals against liquids and gases and does not become brittle even under most difficult operating conditions; Self lubrication – has a very low coefficient of friction against steel (0.08 to 0.1), and being an all graphite material, it is self lubricating; Dimensional stability – Grafseal packing has no tendency to creep or cold flow, and its physical characteristics remain unaffected even at extremes of temperature and pressure fluctuations; Thermal dissipation – heat generated at the shaft or spindle is quickly transferred to the housing where it is dissipated at a rapid rate thereby prolonging the packing and the equipment life; Permeability – is impermeable to all gases and fluids, hence it is a successful material for pumps and valves handling thermic fluids such as dowtherm and other hydrocarbon service conditions; and Radiation resistance – is resistant to radioactivity of any magnitude prevalent in nuclear installations, due to high resistance to radiation Grafseal packings have been standardised by atomic power plants.
