Graphite-PTFE Filament Packing

Graphite-PTFE Filament Packing

Core Features

  • Integrated Composite Filament: Braided from high-tenacity PTFE yarns where high-purity micronized graphite is molecularly bonded into the PTFE matrix. This ensures the graphite remains trapped within the fiber and won’t “wash out” or migrate during high-pressure service.
  • High Thermal Conductivity: The integrated graphite enables the packing to dissipate frictional heat 3 to 4 times faster than pure white PTFE. This prevents thermal expansion issues and protects the pump shaft from “glazing.”
  • Low Friction & High Velocity: Features an exceptionally low coefficient of friction. This allows for higher peripheral shaft speeds (up to 20 m/s) while requiring significantly less breakout torque for valves.
  • Universal Chemical Resistance: Provides near-total immunity to aggressive chemicals, including concentrated acids, alkalis, solvents, and oils across the 0–14 pH range (excluding strong oxidizers).
  • Dimensional Stability: The filament structure is denser and stronger than expanded versions, making it highly resistant to “cold flow” and extrusion under high-pressure conditions.
  • Self-Lubricating Interface: The graphite acts as a permanent internal dry lubricant, ensuring the packing remains soft and pliable throughout its entire service life without the need for additional oily additives.

At Kriloha Ltd., we recognize that in high-velocity rotating equipment, “Heat” is the ultimate predator. A packing that retains heat will eventually destroy both itself and the shaft it is meant to protect. The Kriloha Graphite-PTFE Filament Packing is our engineered answer for “Cool-Running” performance. As a premier global provider of industrial seals, Kriloha Gaskets has mastered the Multi-Lock Braid technology required to turn graphite-integrated PTFE into a high-performance thermal barrier.

The engineering of our Graphite-PTFE series is based on Internal Heat Transfer. By locking the graphite inside the PTFE filaments at the molecular level, we create a “Thermal Highway.” As the shaft spins, the heat is pulled away from the contact surface and dissipated through the packing rings. At Kriloha, we ensure the braid is dense enough to prevent leakage but flexible enough to conform to slightly worn shafts.

Manufacturing this packing at Kriloha involves strict Fiber-Density Verification. We ensure the “Graphite Loading” is perfectly balanced to provide maximum thermal conductivity without compromising the mechanical tensile strength of the PTFE. Whether you are sealing a high-speed chemical transfer pump or a large-scale wastewater mixer, Kriloha Graphite-PTFE Filament Packing provides the mechanical invincibility and thermal stamina your facility demands. By choosing Kriloha Ltd., you are investing in a “High-Velocity” technology that significantly extends your Mean Time Between Failures (MTBF).

Primary Use Cases

  • High-Speed Centrifugal Pumps: The industry standard for handling chemicals, wastewater, and cooling water where heat dissipation is critical.
  • Chemical Agitators & Mixers: Providing a long-life, low-friction seal for large-diameter shafts in the chemical and pharmaceutical industries.
  • Reciprocating Pumps: Ideal for dosing and metering pumps where a high-strength, chemically inert seal is required.
  • Corrosive Valve Stems: Sealing valve stems in plants handling aggressive acids and caustic soda where high-purity containment is mandatory.
  • Paper & Pulp Mills: Handling “white liquor,” “black liquor,” and abrasive stock lines where thermal stability is essential.
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FAQs

What is the difference between this and “GFO” packing?

While similar, Filament packing is often denser and provides higher mechanical strength, making it slightly better for high-pressure valves or reciprocating pumps compared to the softer “expanded” GFO versions.

Is this packing “Shaft-Friendly”?

Absolutely. Because the graphite is integrated into the fiber, it provides a smooth, lubricious contact surface that will not score or wear down stainless steel or bronze shafts.

Can I use this for concentrated Nitric Acid?

Graphite-PTFE is resistant to most chemicals. However, for highly concentrated oxidizing acids (above 90% concentration), the graphite component may react. In those specific cases, Kriloha recommends our Pure White PTFE filament packing.

How much “leak-off” is required?

Because of its superior thermal conductivity, this packing requires much less cooling water than standard fibers. A slow, steady drip (approx. 8–10 drops per minute) is usually sufficient to maintain a cool seal.

How do I install Graphite-PTFE Filament Packing?

Cut the packing into rings with a 45° miter joint. Stagger the joints by 90°. During startup, tighten the gland nuts finger-tight. As the pump reaches operating speed, adjust slowly until the desired leak rate is achieved.

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