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Material Types of Spring‑Energized Seals
Time : 2026-03-02
There are many materials for spring‑energized seals. Most are made of modified and filled polytetrafluoroethylene (PTFE), which improves wear resistance and strength. Other special engineering plastics are also used. Below are our commonly used materials for reference
Pure PTFE
Suitable for light to medium dynamic and static applications. Limited wear and heat resistance, low gas permeability, good low‑temperature properties. Used in medium to extreme vacuum applications.
White Modified PTFE
Suitable for light to medium dynamic and static applications. Limited wear and heat resistance, low gas permeability, good low‑temperature properties. Suitable for medium to extreme vacuum applications.
Black Polymer-Filled PTFE
Excellent wear resistance under high temperature, high pressure and high speed. Especially suitable for water and water‑soluble solutions. Performs well in dry or poor lubrication conditions. Abrasive to soft metals.
Tan Polymer-Filled PTFE
Superior heat and wear resistance, non‑abrasive. Recommended for medium to high‑speed dynamic applications on soft metals.
Golden Synthetic UHMW‑PE
Quite hard with long‑term wear resistance, but limited heat and chemical resistance. Especially suitable for abrasive media.
Gray Self-Lubricating Glass-Filled PTFE
Provides low‑pressure sealing. Softer material, abrasive to soft metals.
Gray Self-Lubricating Organic-Filled PTFE
General‑purpose material with good heat and wear resistance. Recommended for dry and poorly lubricated conditions, especially suitable for water and steam applications.
Synthetic UHMW‑PE
Excellent wear and abrasion resistance, limited heat and chemical resistance.
Black Self-Lubricating Organic-Filled PTFE
Higher hardness and wear resistance. Especially suitable for sealing water and steam in harsh environments. Good resistance to deformation and extrusion under high pressure. Ideal material for back‑up rings.
Pure PEEK
High‑modulus material with excellent heat resistance. Recommended for back‑up rings or other special applications.