Durable & chemically inert PTFE d-seals for static and dynamic applications – by National Fluoromers
| Property | Value |
|---|---|
| Material | Virgin or filled PTFE (glass, carbon, bronze) |
| Shape | D-profile (custom widths and heights) |
| Operating temperature | –200°C to +260°C |
| Chemical compatibility | Excellent – acids, alkalis, solvents, gases |
| Sizes available | ID from 5 mm to 500 mm+ (customizable) |
| Hardness | Shore D 55–65 (varies by compound) |
Used across industries where standard O-rings or flat gaskets may not perform adequately, our PTFE D-seals are custom-fabricated to handle pressure fluctuations, movement, and long-term exposure to harsh environments.
A PTFE D-seal is a precision-machined ring seal with a D-shaped profile, typically used to enhance sealing performance by offering a broader contact area and more resistance to extrusion under pressure. The flat base of the “D” provides stability, while the curved top ensures consistent contact against sealing surfaces.
D-seals are widely used in static or slow dynamic sealing environments where temperature, chemical compatibility, and mechanical strength are critical.
- Unique D-shaped cross-section: Offers higher sealing force and stability
- Chemical inertness: Compatible with almost all industrial chemicals and gases
- Non-stick surface: Reduces wear and prevents contamination
- High-temperature resistance: Operates from –200°C to +260°C
- Extrusion-resistant: Suitable for moderate pressure sealing environments
- Custom sizes and profiles available
- Provides excellent sealing with low closure force
- Suitable for irregular or worn sealing grooves
- Performs under thermal cycling and pressure pulses
- Minimizes friction and wear in moving parts
- Doesn’t swell or deteriorate in aggressive media
- Ideal for hygienic, vacuum, or corrosive systems
- Static sealing in flanges, valves, and covers
- Dynamic sealing in slow-moving shafts and pistons
- Chemical reactors and tanks
- Pharmaceutical and food-grade process equipment
- Semiconductor and cleanroom environments
- Vacuum systems and gas sealing assemblies
- Instrumentation and metering systems
- Chemical & Petrochemical
- Pharmaceuticals & Biotech
- Oil & Gas
- Food & Beverage
- Water Treatment & Filtration
- Marine & Offshore Systems
- Electronics & Semiconductor
- General Engineering & Automation
- Precision-machined PTFE D-seals in any size or design
- FDA, and anti-static grades available
- Engineering support for profile selection and groove fitment
- Export-grade packaging and labeling
- Fast turnaround time for urgent or bulk requirements
- Supplied as individual seals or in application-specific kits
- Custom groove dimensions accepted
- Available in white, black, brown, or pigmented variants
- Vacuum-sealed packaging on request
Send us your required id/od or technical drawing – and we will manufacture a precision d-seal tailored to your application.
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