Custom Machined Teflon Valve Seats
Precision CNC machined PTFE valve seats for check valves, ball valves, and control valves. Universal chemical resistance and self-lubricating performance for chemical processing, water treatment, and industrial applications.
- PTFE valve seats machined for any valve size and configuration
- Virgin PTFE, glass-filled, carbon-filled, and bronze-filled grades available
- Universal chemical resistance, inert to acids, bases, and solvents
- NSF-certified and FDA-compliant virgin PTFE for water and food applications
- Temperature capability to 400°F for continuous service applications
- Reverse engineering service for obsolete Teflon valve seat replacement
Precision CNC Machined PTFE Valve Seats
CDS Plastics manufactures custom Teflon valve seats through precision CNC machining. PTFE's universal chemical resistance and self-lubricating properties eliminate corrosion and reduce operating torque across all valve applications. We machine virgin PTFE for pharmaceutical and food applications, plus filled grades for enhanced dimensional stability and wear resistance.
Why Choose PTFE Valve Seats
Complete Chemical Resistance
Self-Lubricating Performance
Temperature Capability
FDA & NSF Compliance
Solutions for Common Valve Seat Problems
Metal Seat Corrosion from Chemicals
PTFE valve seats are completely inert to all chemicals. No corrosion byproducts contaminate process fluids. Service life measured in years rather than months. One-time replacement eliminates recurring failures.
Obsolete Valve Parts Unavailable
We machine exact PTFE replacements through reverse engineering, capturing all critical dimensions from your worn seat. Creates permanent solution with documentation for future reorders.
Persistent Valve Leakage
Precision machined PTFE surfaces with tight tolerances ensure proper contact. Quality control verifies flatness within ±0.002" and surface finish to eliminate leak paths. CNC machining produces consistent results.
Temperature Extremes Damaging Seats
PTFE handles -60°F through 400°F continuous service. Maintains dimensional stability across entire range. Bronze-filled PTFE extends high-temp capability to 450°F for extreme service conditions.
Lubrication Contamination Concerns
Self-lubricating PTFE eliminates external lubrication completely. Low friction coefficient (0.05-0.10) provides smooth operation without grease contamination risks. FDA-compliant virgin PTFE ensures no material migration.
Technical Specifications & Capabilities
Valve Types & Configurations
- Check valve seats (swing, lift, ball)
- Ball valve seats (trunnion and floating)
- Gate valve seats
- Butterfly valve seats
- Control valve seats
- Plug valve seats
PTFE Machining Capabilities
- Seat diameter: 0.5" through 24"
- Sealing angles: 45°, 60°, 90° or custom
- Flatness: ±0.002" across sealing surface
- Surface finish: 63Ra standard, better available
- O-ring grooves and mounting features
- Press-fit, threaded, or bonded mounting
PTFE Grade Selection Guide for Valve Seats
Choose the right Teflon/PTFE grade based on your operating conditions:
| PTFE Grade | Key Properties | Temperature Range | Best Applications |
|---|---|---|---|
| Virgin PTFE (Unfilled) | Universal chemical resistance, lowest friction (0.05-0.10), FDA/NSF compliant, highest purity | -60°F to 400°F | General chemical valves, pure chemicals, food/pharma, ultra-pure water, potable water |
| Glass-Filled PTFE (15-25%) | Improved dimensional stability, reduced cold flow/creep, better wear, enhanced load bearing | -60°F to 400°F | High pressure service, tight sealing requirements, reduced deformation, minimal creep applications |
| Carbon-Filled PTFE (15-25%) | Enhanced strength and stiffness, excellent wear resistance, improved stability, lower thermal expansion | -60°F to 400°F | Abrasive slurries, high cycle applications, improved dimensional stability, elevated temperature |
| Bronze-Filled PTFE (40-60%) | Highest load bearing capacity, extreme wear resistance, maximum thermal conductivity, minimal deformation | -60°F to 450°F | High pressure/temperature, heavy duty chemical valves, compressor valve seats, extreme service |
Understanding PTFE Fillers
All grades above are Teflon/PTFE-based materials. Fillers (glass, carbon, bronze) are added to virgin PTFE to enhance specific mechanical properties while maintaining PTFE's signature chemical resistance and low-friction characteristics.
When to use unfilled vs. filled PTFE: Use virgin (unfilled) PTFE when chemical purity and lowest friction are critical. Use filled grades when you need enhanced dimensional stability, reduced creep under load, or improved wear resistance in high-cycle applications.
How to Get a Quote
Select your submission method below. We manufacture from drawings, specifications, or physical parts.
COMMON PTFE VALVE SEAT FEATURES WE MANUFACTURE
Industries and Applications
Chemical Processing
- Acid and base handling, PTFE inert to all concentrations
- Solvent transfer system check valves
- Corrosive gas control valves
- Teflon seats withstand aggressive exposure indefinitely
- No corrosion byproducts contaminate process streams
Water & Wastewater Treatment
- Chlorine-resistant PTFE valve seats for chemical feed
- NSF-61 certified virgin PTFE for potable water
- Check valve seats for pumping stations
- Control valve Teflon seats for process optimization
- Permanent corrosion resistance in chlorinated environments
Pharmaceutical Manufacturing
- USP Class VI compliant virgin PTFE valve seats
- Sanitary check valves for WFI and purified water
- Clean-in-place compatible Teflon materials
- FDA-compliant PTFE prevents material migration
- Zero contamination from seat materials
Food & Beverage Processing
- FDA-compliant virgin PTFE valve seats
- Sanitary valve components for product transfer
- Check valves in CIP/SIP systems
- Non-contaminating Teflon prevents taste/odor transfer
- Washdown-resistant PTFE for daily cleaning protocols
Semiconductor & Electronics
- Ultra-pure chemical delivery system valves
- Vacuum system PTFE valve seats
- Cleanroom compatible Teflon materials
- Zero outgassing in controlled environments
- Particle-free operation for sensitive processes
Oil, Gas & Petrochemical
- High-pressure PTFE seats (glass and carbon-filled)
- Sour gas service, Teflon resists H2S completely
- Compressor valve seats (bronze-filled PTFE)
- High-temperature service to 450°F with bronze-filled
- Abrasion-resistant carbon-filled PTFE for slurry applications
Frequently Asked Questions
Why choose Teflon (PTFE) valve seats over metal seats?
Can you replicate obsolete Teflon valve seats?
Which PTFE grade should I choose for my valve seats?
What's the minimum quantity for custom Teflon valve seats?
Contact us for custom Teflon (PTFE) valve seat manufacturing
