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Materials Used in 3-Position Pneumatic Actuators
1. Body & Structural Components
- Aluminum: Lightweight and corrosion-resistant for general industrial use
- Stainless Steel (304/316): For corrosive environments (chemical/oil & gas)
- Carbon Steel with Coatings: Heavy-duty applications requiring extra strength
2. Sealing & Wear Components
- NBR (Nitrile) Rubber: Standard seals for most operating conditions
- FKM (Viton): High-temperature and chemical-resistant seals
- PTFE: Used for low-friction and aggressive media applications
3. Piston & Moving Parts
- Anodized Aluminum: Lightweight piston construction
- Stainless Steel Rods: Corrosion-resistant shafts for harsh environments
- POM (Acetal) Bearings: Low-wear, self-lubricating guides
4. Spring Components
- Stainless Steel Springs: Corrosion-resistant for fail-safe mechanisms
- Music Wire Springs: Cost-effective option for standard models
5. Specialized Components
- Bronze Bushings: For high-load rotary actuators
- UHMW-PE Wear Strips: In heavy-duty linear models
Material Selection Factors
- Operating pressure/temperature ranges
- Chemical compatibility requirements
- Industry-specific certifications (FDA, NACE)
- Expected cycle life and maintenance intervals
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