Pure Graphite-PTFE Packing (Lubricated with Oil)

Pure Graphite-PTFE Packing (Lubricated with Oil)

Core Features

  • Molecularly Integrated Composite: Braided from high-purity expanded PTFE yarns where micronized graphite is encapsulated within the fiber structure itself. This ensures the lubricant is a permanent part of the packing and won’t “wash out” or migrate during high-pressure service.
  • Inert Oil Impregnation: Treated with a specialized, chemically stable break-in oil. This added lubrication serves as a sacrificial cooling agent during the critical initial startup phase, preventing the “dry-burn” often associated with new seals.
  • Exceptional Thermal Management: The integrated graphite enables the packing to dissipate frictional heat 3 to 5 times faster than pure white PTFE. This prevents thermal expansion issues and protects expensive stainless steel shafts from “glazing.”
  • High-Velocity Performance: The combination of PTFE’s natural slickness, internal graphite, and external oil allows for higher peripheral shaft speeds (up to 22 m/s) compared to non-lubricated fibers.
  • Universal Chemical Resistance: Chemically inert across the almost entire 0–14 pH range. It is resistant to aggressive acids, alkalis, solvents, and oils (excluding strong oxidizers in high concentrations).
  • Soft and Conformable: The expanded fiber structure is highly compressible, allowing it to fill microscopic surface irregularities in the stuffing box even on slightly worn or out-of-round shafts.

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 Lubricated Graphite-PTFE Packing is our engineered answer for “Cool-Running” performance. As a premier global provider of industrial seals, Kriloha Gaskets has mastered the Pressure-Saturating technology required to lock specialized lubricants deep into the graphite-PTFE matrix.

The engineering of this packing is based on Internal Heat Transfer. By locking the graphite inside the expanded PTFE fibers, we create a “Thermal Highway.” As the shaft spins, the heat is pulled away from the contact surface and dissipated through the packing rings. The added oil impregnation ensures that during the first few hours of operation—when the packing is “bedding in”—friction is kept to an absolute minimum. At Kriloha, we utilize a vacuum-impregnation process to ensure the oil is distributed evenly throughout the cross-section, not just on the surface.

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 Lubricated Graphite-PTFE Packing provides the mechanical invincibility and thermal stamina your facility demands. By choosing Kriloha Ltd., you are investing in a “Reduced-Friction” technology that saves energy and extends the life of your expensive rotating hardware.

Primary Use Cases

  • High-Speed Centrifugal Pumps: The premier choice for pumps handling chemicals, wastewater, and cooling water where heat dissipation is the primary concern.
  • Chemical Agitators & Mixers: Providing a long-life, low-maintenance 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, and lubricated seal is required.
  • Paper & Pulp Mills: Handling “white liquor,” “black liquor,” and abrasive stock lines where thermal stability and chemical resistance are mandatory.
  • Condensate & Boiler Feed Pumps: Capable of handling hot water and steam cycles without the hardening or brittleness associated with inferior synthetic fibers.
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FAQs

Why use “Lubricated” Graphite-PTFE instead of “Dry” versions?

The oil acts as a “break-in” lubricant. It ensures that if the gland is accidentally over-tightened during startup, the packing won’t immediately burn or glaze the shaft. It provides an extra safety margin for maintenance teams.

Is this packing “Shaft-Friendly”?

Absolutely. Because the graphite is integrated into the fiber, it provides a smooth, lubricous contact surface that will not score or wear down 316 Stainless Steel or bronze shafts.

Can I use this for concentrated Nitric Acid?

It is resistant down to pH 0. However, for highly concentrated oxidizing acids (above 90% concentration), the graphite component may react. In those rare cases, Kriloha recommends our Pure White PTFE filament packing.

Does it require a large “leak-off” for cooling?

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

How do I install this 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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