PTFE impregnated asbestos valve packing
Asbestos PTFE packing offers a reinforced sealing structure where asbestos fibers provide strength and thermal stability, while PTFE impregnation enhances lubricity and chemical resistance. This balanced construction allows the packing to perform reliably in valves, pumps, and industrial equipment handling steam, oil, and corrosive media under demanding operating conditions.
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Asbestos PTFE Packing Data Sheet
| Test Item | Unit | Target |
| Pressure | Mpa | 0-30 |
| Linear Speed | m/s | 10 |
| Temperature | ℃ | -50~+260 |
| Pn Value | 2-12 |
PTFE impregnated asbestos valve packing (also called asbestos PTFE packing) is a high-performance sealing material specifically designed for industrial valves under high temperature, high pressure and corrosive media. Combining the excellent mechanical strength of asbestos fiber with the superior lubricity and chemical resistance of PTFE, it is widely used in steam valves, chemical valves and petrochemical pumps.
What is PTFE Impregnated Asbestos Packing?
PTFE impregnated asbestos packing (asbestos PTFE packing) is manufactured by braiding high-quality asbestos yarn and then thoroughly impregnating and coating each strand with PTFE suspension. This special process ensures that every fiber is fully protected by PTFE, dramatically improving lubricity, corrosion resistance and service life compared with traditional dry asbestos valve packing.
Key Advantages of Asbestos PTFE Packing
- · Excellent high-temperature resistance up to 280 °C – perfect for steam valve applications
- · Superior self-lubricating performance reduces shaft wear and Outstanding chemical resistance (pH 2-12), compatible with acids, alkalis, oils and solvents
- · High pressure resistance up to 30 MPa, ideal for high-pressure gate valves and globe valves
- · Long service life – 2-3 times longer than ordinary asbestos packing
Typical Applications of Asbestos Valve Packing
- 1. High-temperature steam valves & superheated steam lines
- 2. Petrochemical & refinery gate valves
- 3. Acid/alkali centrifugal pumps
- 4. Power plant boiler feed pumps
- 5. Reciprocating plunger pumps in chemical plants
Frequently Asked Questions
Is asbestos PTFE packing safe?
Our asbestos PTFE packing uses chrysotile (white asbestos) that is fully encapsulated by PTFE. It meets international safety standards during normal use and installation.
Can it replace pure PTFE packing?
Yes. In high-pressure and high-temperature valve applications, asbestos PTFE packing provides better compression resilience and longer life than pure PTFE packing.
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