Carbonized Fiber Packing (Graphite Impregnated)

Carbonized Fiber Packing (Graphite Impregnated)

Core Features

  • High-Stability Carbonized Matrix: Braided from specialized polyacrylonitrile (PAN) fibers that have undergone a controlled thermal carbonization process. This creates a fiber that possesses the thermal resistance of carbon while retaining the flexibility of a synthetic textile.
  • Deep-Soak Graphite Impregnation: Every individual strand is vacuum-impregnated with high-purity micronized graphite. This ensures that the lubricant is not just a surface coating but is present through the entire cross-section of the packing.
  • Exceptional Thermal Conductivity: The carbonized base material and heavy graphite loading create a “thermal bridge,” rapidly wicking heat away from the shaft interface to prevent localized hotspots and “glazing.”
  • Superior Pressure Resilience: Unlike softer PTFE packings, carbonized fiber maintains its structural integrity under high hydraulic pressures, resisting extrusion and “cold flow” in the stuffing box.
  • Low Friction & High Velocity: The integrated graphite acts as a permanent dry lubricant, allowing for surface speeds up to 15–20 m/s with minimal breakout torque and reduced power consumption.
  • Broad Chemical Resilience: Highly resistant to a wide array of industrial media, including hot water, steam, oils, solvents, and mild acids or alkalis (pH range 2–12).

Detailed Technical Description (Kriloha Gaskets Branding)

At Kriloha Ltd., we recognize that in modern industrial pumping, the “middle ground” is the most demanding. You need a seal that is stronger than PTFE but kinder to shafts than Aramid. The Kriloha Carbonized Fiber Packing with Graphite is our engineered answer for “High-Cycle” thermal service. As a premier global provider of industrial seals, Kriloha Gaskets has perfected the Multi-Stage Saturating technology required to turn carbonized yarns into a self-lubricating sealing powerhouse.

The engineering of our Carbonized series is based on Structural Resilience. While standard synthetic fibers can melt or shrink when the stuffing box gets hot, our carbonized fibers have already been “fire-stabilized” during the manufacturing process. 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 Lubricant-Loading Calibration. We ensure the graphite content is high enough for maximum thermal conductivity but balanced so that the tensile strength of the carbonized fiber is never compromised. Whether you are sealing a high-speed chemical transfer pump or a large-scale wastewater mixer, Kriloha Carbonized Fiber Packing provides the mechanical invincibility and thermal stamina your facility demands. By choosing Kriloha Ltd., you are investing in a “High-Efficiency” technology that maximizes equipment uptime while protecting your expensive rotating assets.

Primary Use Cases

  • Centrifugal & Rotary Pumps: The industry standard for handling hot water, hydrocarbons, and chemicals where heat dissipation is a primary concern.
  • Boiler Feed Pumps: Capable of handling high-temperature condensate and feed water without becoming brittle or shrinking.
  • Chemical Agitators: Providing a durable, low-friction seal for large-diameter shafts that may experience slight vibration or mechanical “run-out.”
  • Paper & Pulp Mills: Resisting the mechanical wear and chemical aggression of stock lines and “white liquor” processing.
  • Wastewater Treatment: Ideal for pumps handling grit and organic solids that require a “tough-yet-lubricated” fiber to prevent shaft wear.
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FAQs

How does this differ from “Pure Carbon” packing?

Pure carbon fiber is much stiffer and more expensive, designed for extreme high-pressure/high-heat valves. Carbonized Fiber is more flexible and “pump-friendly,” making it easier to install and better at conforming to rotating shafts.

Will this packing score my pump shaft?

No. Because of the heavy graphite impregnation, the packing provides a smooth, lubricious interface. It is significantly kinder to shafts than Aramid (Kevlar®) while offering much better heat resistance than standard synthetic fibers.

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 or Pure Carbon Fiber packings.

How much “leak-off” is required for cooling?

Due to its excellent thermal conductivity, this packing can run with a very low leak rate. A slow, steady drip (approx. 8–10 drops per minute) is usually sufficient to maintain a cool seal at the shaft.

How do I install Carbonized Fiber Packing?

Cut the packing into rings with a 45° miter joint. Stagger the joints by 90°. During the initial “break-in” phase, tighten the gland nuts slowly to allow the graphite to establish a film on the shaft before reaching the final operating tension.

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