Nomex® Fiber Packing

Nomex® Fiber Packing

Core Features

  • High-Temperature Meta-Aramid Structure: Braided from genuine Nomex® (Meta-Aramid) fibers, which offer a unique combination of heat resistance, flame retardancy, and mechanical toughness.
  • Superior Thermal Insulation: Unlike standard para-aramids (Kevlar®), Nomex® is specifically engineered for high-heat environments, maintaining its physical properties at continuous temperatures up to +250°C to +280°C.
  • Multi-Lock Braided Construction: Features a dense, square-cross-section braid that provides excellent dimensional stability and prevents the packing from “rolling” in the stuffing box under pressure.
  • PTFE & Lubricant Impregnation: Each strand is vacuum-impregnated with a specialized PTFE dispersion and treated with a high-temperature break-in lubricant. This reduces frictional heat and ensures the packing remains soft and pliable.
  • Non-Scoring “Soft” Toughness: While extremely strong, Nomex® fibers are less abrasive than Para-Aramid (Kevlar®), making this packing much kinder to stainless steel shafts and sleeves with lower hardness levels.
  • Excellent Chemical Resilience: Highly resistant to mild acids, alkalis, oils, steam, and most industrial solvents (pH range 3–11).

 

At Kriloha Ltd., we recognize that not every application requires the ballistic “brute force” of yellow aramid. Sometimes, the priority is Thermal Agility and Shaft Protection. The Kriloha Nomex® Fiber Packing is our engineered answer for “Heat-Sensitive” industrial sealing. As a premier global provider of braided packings, Kriloha Gaskets has mastered the Symmetric-Lock Braid required to turn these heat-resistant fibers into a high-performance fluid barrier.

The engineering of our Nomex® series is based on Thermal Elasticity. While standard aramids can become brittle or “carbonize” when run dry, Nomex® remains resilient. At Kriloha, we utilize a specialized “Deep-Soak” PTFE impregnation process. This ensures that even as the surface of the packing wears, a fresh layer of PTFE lubricant is always available at the shaft interface. This “Internal Reservoir” is what allows Kriloha Nomex® packing to run cooler and longer than generic synthetic fibers.

Manufacturing this packing at Kriloha involves strict Fiber-Purity Verification. We ensure that our Meta-Aramid yarns are free from low-grade fillers that could degrade at high temperatures. Whether you are sealing a high-speed condensate pump or a chemical mixer, Kriloha Nomex® Fiber Packing provides the mechanical stamina and thermal agility your facility demands. By choosing Kriloha Ltd., you are investing in a “Shaft-Friendly” technology that reduces the total cost of ownership through less frequent sleeve replacements.

Primary Use Cases

  • Hot Water & Condensate Pumps: The premier choice for boiler feed pumps and condensate return systems where thermal stability is critical.
  • Chemical Process Agitators: Providing a durable, non-contaminating seal for large-diameter shafts handling medium-strength chemicals.
  • Municipal Wastewater Treatment: Resisting the mechanical wear of grit and organic solids while maintaining a cool-running seal.
  • Paper & Pulp Mills: Handling “white water” and stock lines where a combination of heat and abrasion resistance is required.
  • Food Processing Ovens: Utilized as a high-temperature static seal for oven doors and industrial dryer housings due to its flame-retardant properties.
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FAQs

What is the difference between Nomex® and Kevlar® packing?

Kevlar® (Para-Aramid): Higher tensile strength, better for extreme abrasion/slurry, but can be more abrasive to the shaft.

Nomex® (Meta-Aramid): Better thermal insulation and “flame-safe” properties, softer on the shaft, and more flexible for easier installation.

Can I use this packing for high-pressure steam?

It is excellent for saturated steam and hot water up to its temperature limit (approx. 280°C). For superheated steam at higher temperatures, Kriloha recommends our Flexible Graphite grades.

Does Nomex® packing require a break-in period?

Yes. Like all PTFE-impregnated packings, Kriloha recommends a controlled break-in. Allow a steady leak-off initially to wash away frictional heat, then gradually adjust the gland until the desired “drop-per-minute” rate is reached.

Is this packing compatible with solvents?

Nomex® has very good resistance to most common industrial solvents and oils. However, it should be avoided in concentrated acids or strong oxidizing agents where the pH falls below 3.

How do I determine the correct packing size?

Measure the Shaft/Sleeve Diameter (ID) and the Stuffing Box Diameter (OD). Subtract the ID from the OD and divide by two. This is the required Cross-Section (CS) size (e.g., 12mm or 1/2″).

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