The graphite pressure sealing ring (also known as flexible graphite pressure ring, high-pressure graphite seal component, or high-temperature resistant graphite sealing ring) is a high-end sealing component made from high-purity flexible graphite as the core material, with an optional metal framework for reinforcement. The product features outstanding high-temperature resistance (up to 650°C in oxidative environment, up to 3000°C in inert environment), all-conditions corrosion resistance (suitable for complex media such as acids, alkalis, and organic solvents), and extremely strong pressure-bearing capacity (up to 100 bar under static conditions), and it also has self-lubrication properties. It offers strong sealing reliability and is widely used in key sealing scenarios such as valves, pump bodies, reaction vessels, flange connections, etc. in industries like petrochemicals, power energy, metallurgical machinery, pharmaceuticals, and environmental protection. It is an ideal alternative to traditional sealing components in extreme conditions.
Core Strengths
Ultra-wide temperature range stable sealing
Operating temperature range: -200℃ (low-temperature refrigeration conditions) to 650℃ (air oxidation environment); -200℃ to 3000℃ (inert gas environments such as nitrogen, argon, etc.)
Advantages: No thermal brittleness or deformation under alternating high and low temperature conditions, suitable for dynamic temperature change scenarios such as boiler start-stop and reaction vessel heating-cooling
Full operating pressure resistance capability
Static working pressure: ≤ 100 bar (1450 psi), suitable for static scenarios such as flanges and end-face seals
Dynamic working pressure: ≤ 50 bar (725 psi), suitable for rotational/repeating motion seals such as pump shafts and valve stems
Advantages: Maintains seal surface adhesion even under pressure fluctuations, prevents medium leakage, and meets the safety operation requirements of high-pressure equipment
Full-media corrosion resistance
characteristics
Compatible media:
Strong acid types: sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, etc.
Strong base types: sodium hydroxide, potassium hydroxide, etc.
Organic media: methanol, ethanol, acetone, various oils, organic solvents, etc.
Special media: steam, high-temperature flue gas, molten salts, liquid metals, etc.
Typical Application Scenarios
Petrochemical industry
Core applications: Flange sealing for refining and chemical plants, end face sealing for hydrogenation reactors, pipeline sealing for desulfurization towers / denitrification towers, shaft sealing for crude oil / refined oil transfer pumps, interface sealing for chemical medium storage tanks
Typical conditions: 300℃ + high temperature, 80 bar high pressure, corrosive media with strong acids / strong alkalis
Electric power energy industry
Core applications: Fire power boiler pipeline flange sealing, nuclear power turbine shaft sealing, waste heat boiler sealing, transformer oil reservoir sealing, photovoltaic silicon material purification equipment sealing
Typical operating conditions: 500℃ + high temperature, 100 bar high pressure, steam / heat transfer oil medium
Metallurgical machinery industry
Core applications: Furnace door sealing for high-temperature furnaces, Sealing of crystallizer in continuous casting machines, Valve sealing in hydraulic systems, Sealing of metallurgical reagent reaction vessels, Axial sealing of high-temperature fans
Typical operating conditions: 800℃ + high temperature, 60 bar + high pressure, Dust / high-temperature flue gas medium
Why Choose Us?
As the leading company in the field of graphite rings for industrial sealing in China, Zhongguo Shiguo Technology has overcome the problem of the interface bonding between graphite and resin, and passed the German TUV high-temperature sealing certification. We provide customized solutions, from material selection to process optimization, to ensure that the products meet the requirements of extreme working conditions.
Act Immediately
Provide your sealed scenario (temperature, pressure, medium), and we will provide an industrial sealing graphite ring selection plan (including corrosion resistance and friction coefficient test reports) within 48 hours. Verified by over 50 global customers: The industrial sealing graphite rings of Zhongshiguo Technology ensure more reliable operation of key equipment!
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