Graphite-Treated PAN Fiber Packing

Graphite-Treated PAN Fiber Packing

Core Features

  • High-Strength PAN Matrix: Braided from high-tenacity Polyacrylonitrile (PAN) fibers. As a technical precursor to carbon fiber, PAN offers significantly higher tensile strength and thermal stability than standard acrylic or vegetable fibers.
  • Deep-Soak Graphite Impregnation: Every individual strand is vacuum-impregnated with high-purity micronized graphite. This ensures the lubricant is present throughout the entire cross-section, providing consistent performance even as the packing wears.
  • Superior Heat Dissipation: The integrated graphite creates a “thermal bridge,” rapidly wicking frictional heat away from the shaft interface. This prevents localized hotspots and protects the packing from “glazing” at higher peripheral speeds.
  • Low-Friction Operation: The graphite acts as a permanent dry lubricant, ensuring a low coefficient of friction. This reduces breakout torque for valves and lowers power consumption in rotating equipment.
  • Non-Abrasive “Soft-Tough” Fiber: Unlike Aramid (Kevlar®), PAN fiber provides high-pressure reinforcement without being abrasive. It effectively seals without the risk of scoring or wearing down stainless steel shafts and bronze sleeves.
  • Excellent Dimensional Stability: Engineered to resist shrinking and “cold flow.” The packing maintains its square profile and a reliable sealing “bite” even under fluctuating pressures and temperatures.

At Kriloha Ltd., we recognize that in modern industrial pumping, the “middle ground” is often the most demanding. You need a seal that is stronger than standard synthetic fiber but more thermally agile than a basic white packing. The Kriloha Graphite-Treated PAN Fiber Packing is our engineered answer for “High-Cycle” universal service. As a premier global provider of industrial seals, Kriloha Gaskets has mastered the Multi-Stage Saturating technology required to turn technical PAN yarns into a self-lubricating sealing powerhouse.

The engineering of our Graphite-PAN series is based on Lubricant Density. By saturating the fibers with graphite before and during the braiding process, we create an internal “Lubricant Reservoir.” This ensures that a fresh layer of graphite is always available at the shaft interface. At Kriloha, we utilize a specialized graphite dispersion that fills the microscopic voids between the braided yarns, creating a dense, leak-proof barrier that remains soft and pliable over thousands of hours of operation.

Manufacturing this packing at Kriloha involves strict Tensile-Strength Verification. We ensure our PAN yarns meet rigorous industrial standards for fiber density and heat resistance. Whether you are sealing a high-speed water pump or a chemical agitator, Kriloha Graphite-Treated PAN Fiber Packing provides the mechanical invincibility and thermal stamina your facility demands. By choosing Kriloha Ltd., you are investing in a “High-Value” technology that maximizes your equipment uptime while protecting your expensive rotating assets.

Primary Use Cases

  • General Purpose Centrifugal Pumps: The ideal choice for municipal water, cooling water, and mild chemical transfer where heat management is a priority.
  • Wastewater & Sewage Treatment: Handling organic solids and grit-loaded fluids that require a tough, lubricated fiber to maintain a seal.
  • Paper & Pulp Mills: Used in stock lines and “white water” processing where chemical resistance and thermal stamina are required.
  • Agitators & Mixers: Providing a long-life, low-maintenance seal for large-diameter shafts handling viscous media.
  • Medium-Duty Slurry Pumps: Capable of handling mildly abrasive fluids where a “shaft-friendly” alternative to Aramid is necessary.
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FAQs

 

What makes PAN fiber better than standard Acrylic?

PAN fiber has much higher heat resistance and tensile strength. It maintains its structural integrity in high-temperature water service where standard acrylic might become brittle or shrink.

Will this packing score my pump shaft?

No. PAN is a non-abrasive synthetic, and the heavy graphite loading provides a smooth, lubricious interface that protects stainless steel and bronze hardware from wear.

Can I use this for concentrated Nitric Acid?

It is resistant within the pH 2–12 range. For highly concentrated oxidizing acids (pH 0–1), Kriloha recommends our Pure White PTFE Filament packing.

Does it require a specific “leak-off” rate?

A slow, steady drip (approx. 10–12 drops per minute) is recommended during operation to ensure the graphite can effectively transfer heat and maintain a lubricating film.

How do I install Graphite-Treated PAN Packing?

Cut the packing into rings with a 45° miter joint. Stagger the joints by 90°. During startup, tighten the gland nuts finger-tight and adjust slowly as the pump reaches operating speed to ensure a cool “seating.”

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