Introduction
In harsh industrial environments, standard packing materials often struggle to maintain reliable sealing. PTFE offers excellent chemical resistance and low friction but lacks mechanical strength and high-temperature stability. Aramid fibers provide strength but may not withstand extreme heat or certain aggressive media.
PTFE Packing with Kynol Fiber Corners solves this problem. Kynol® is a high-performance novoloid fiber known for exceptional thermal stability, flame resistance, and chemical tolerance. By reinforcing PTFE packing with Kynol at the corners — where stress is highest — this hybrid material delivers superior sealing performance across a wide range of severe service conditions.
Excellent Chemical Resistance – The PTFE body resists almost all chemicals, including strong acids, alkalis, and solvents, across pH 0–14.
Superior High-Temperature Performance – Continuous operation up to 280°C, exceeding standard PTFE and many aramid-based packings.
High Mechanical Strength – Kynol-reinforced corners prevent extrusion and deformation under high pressure.
Inherent Flame Resistance – Kynol fibers do not melt, drip, or support combustion, enhancing safety in fire-risk environments.
Low Friction – PTFE provides a low coefficient of friction (0.05–0.09), minimizing shaft and stem wear.
Easy Installation – Can be cut and installed on-site with standard tools.
Parameter | Value |
Density | 1.5 – 1.9 g/cm³ |
Temperature Range | –200°C to +280°C |
Pressure Limit (Pumps) | Up to 250 bar |
Pressure Limit (Valves) | Up to 400 bar |
pH Range | 0 – 14 |
Coefficient of Friction | 0.05 – 0.09 |
Available forms: Square cross-section, 3–50 mm sizes, coils of 3–10 meters, white PTFE body with dark Kynol corners.
Chemical & Petrochemical – Pumps, reactors, valves handling corrosive fluids
Power Generation – Boiler feed pumps, high-pressure steam valves
High-Temperature Processes – Furnace seals, heat exchangers, chemical injection systems
Pharmaceutical & Food – Sanitary pumps exposed to hot CIP/SIP cleaning
Marine & Offshore – Seawater pumps, chemical injection systems
Feature | PTFE + Kynol Corners | Standard PTFE | Aramid + PTFE |
Max Temp | 280°C | 260°C | 300°C |
Chemical Resistance | Excellent (pH 0–14) | Excellent (pH 0–14) | Good (pH 2–13) |
Mechanical Strength | High | Low–Moderate | Very High |
Flame Resistance | Excellent | Poor (melts) | Good |
Shaft Wear | Very Low | Very Low | Low–Moderate |
Cut cleanly with a sharp knife for square ends.
Stagger ring joints by 90° to prevent leak paths.
Tighten gland bolts progressively to allow bedding-in.
Avoid over-compression — PTFE can cold-flow.
Periodically re-torque and inspect for wear.
PTFE Packing with Kynol Fiber Corners offers a balanced, high-performance sealing solution for applications requiring both chemical resistance and thermal stability. Its hybrid construction delivers reliability, safety, and extended equipment life.
For engineers facing high temperatures, aggressive chemicals, or fire-risk conditions, this packing provides a cost-effective, durable answer to today's most demanding sealing challenges.
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