Graphite Packing Seals for High-Temperature Applications

Graphite Packing Seals Overview

Graphite packing seals are designed for extreme operating conditions involving high temperature, high pressure, and corrosive media. Manufactured from high-purity flexible graphite, they provide reliable sealing for rotating and reciprocating equipment such as pumps, valves, and reactors.

Thanks to their excellent self-lubrication, thermal stability, and chemical resistance, graphite packings are widely used in industries including power generation, petrochemical processing, chemical manufacturing, and heavy industry.

Key Advantages of Graphite Packing

• Extreme Temperature Resistance: Maintains sealing integrity from -200°C up to +450°C in oxidizing environments, with reinforced grades exceeding +600°C.

• Superior Self-Lubrication: Naturally low friction reduces shaft and valve stem wear, extending equipment service life.

• Excellent Chemical Stability: Resistant to most acids, alkalis, solvents, and corrosive fluids (except strong oxidizing acids).

• High Thermal Conductivity: Rapid heat dissipation prevents localized overheating and improves operational safety.

• Clean & Environmentally Friendly: Asbestos-free, non-contaminating, suitable for food and pharmaceutical applications.

Grades of Graphite Packing

• Pure Graphite Packing: Made from high-purity expanded graphite, offering excellent flexibility and chemical compatibility.

• Reinforced Graphite Packing: Enhanced with stainless steel wire, nickel wire, Inconel wire, or ceramic fiber for higher pressure, higher speed, and more demanding conditions.

Optional impregnation with anti-oxidation inhibitors or PTFE dispersion is available to further improve performance in specific environments.

Typical Applications

• Energy & Power Generation: Boiler feed pumps, high-pressure steam valves, turbine shaft seals, flue gas desulfurization systems.

• Oil & Petrochemical: Hot oil pumps, reactors, catalytic cracking units, corrosive fluid transfer pumps and valves.

• Химическая обработка: Equipment handling acids, alkalis, organic solvents, and heat-transfer fluids.

• High-Temperature Fluid Systems: Molten salt pumps, thermal oil systems, high-temperature water circulation.

• General Industry: Pulp & paper, steel, marine, pharmaceutical, and any application facing high heat, pressure, or corrosion.

Why Choose Our Graphite Packing

• Optimized Braided Structure: Ensures uniform radial load, excellent conformability, and stable sealing even with shaft vibration.

• Customized Impregnation Options: Anti-oxidation agents or PTFE dispersions available for extreme or oxygen-rich environments.

• Low Leakage Performance: Helps meet strict environmental and emission standards while minimizing media loss.

• Easy Installation: Soft, flexible texture allows quick cutting and accurate fitting, reducing maintenance errors.

• Outstanding Cost Efficiency: Long service life and reduced downtime deliver a lower total cost of ownership.