Industrial Expanded PTFE Cord & Round Profile Stock
Manufactured from multi-directionally expanded pure PTFE resin, our PTFE cord stock is a flexible, highly versatile round profile sealing stock. Designed for fast custom valve stem packing, pump stuffing box repacking, and mechanical seals, it provides superior compression resilience and zero cold flow under high-stress operating conditions.
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High-Density ePTFE Profile & Maintenance Stock
Industrial Expanded PTFE Cord & Round Profile Stock
Hebei Xinda offers premium industrial-grade ptfe cord and bulk ptfe cord stock, manufactured from 100% virgin PTFE through an advanced expanded fluoropolymer technique. Unlike rigid extruded rods or pre-formed braided ropes, expanded PTFE round cords feature a highly uniform micro-fibrous matrix that offers exceptional flexibility and compressibility while resisting lateral creep. Supplied in continuous spool stock, this material serves as an indispensable raw stock for plant maintenance teams and OEM valve manufacturers crafting custom valve stem packing rings, gland seals, and chemical shaft packing on demand.
Controlled expansion process yields a dense round core that compresses evenly into valve stuffing boxes without extruding into gland clearances.
Inherently low friction coefficient minimizes valve stem actuation torque and eliminates stick-slip motion in control valves.
Immune to severe chemical attack, concentrated acids, strong alkalis, solvents, and high-pressure steam up to +260°C.
PTFE Cord Stock Technical Data Sheet
| Test Parameter | Unit / Standard | Specification Standard |
|---|---|---|
| Base Polymer Resin | % | 100% Unfilled Expanded Virgin PTFE |
| Standard Cord Diameters | mm | Ø 1.5mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm, 10.0mm+ |
| Operating Temperature Window | °C | -200 °C to +260 °C |
| Pressure Limit (Valves & Glands) | MPa / bar | Up to 20 MPa |
| Packaging Format | Spool | Continuous spools (5m, 10m, 25m, 50m lengths) |
Why Keep Expanded PTFE Cord Stock in Maintenance Inventory?
- Custom Packing Ring Fabrication: Maintenance engineers can wrap the cord into valve stuffing boxes to form seamless, custom-compressed packing rings, eliminating lead times for pre-formed molded sets.
- Zero Cold Flow & High Recovery: Multi-axial expansion locks the polymer chains in place, drastically reducing the thermal expansion relaxation common in standard extruded PTFE round bars.
- Emergency Repair Versatility: Ideal for repacking corroded valve stems, sight glass housings, and pump gland covers during unexpected chemical plant shut downs.
Primary Engineering Applications
Self-forming stuffing box packing for globe, gate, plug, and control valve stems handling aggressive chemicals.
Dynamic shaft packing stock for chemical dosing pumps, acid transfer units, and laboratory slurry agitators.
Conformable circular seating seals for chemical reactor sight glasses, level indicators, and inspection ports.
Versatile raw stock for specialized sealing manufacturers producing custom soft fluoropolymer rings and profile inserts.
