Scotch Yoke Actuator Material Composition
Scotch yoke actuators are constructed using a variety of materials, each selected for specific properties that enhance performance, durability, and suitability for different operating conditions.
Cylinder Materials
- Stainless steel (304/316): Excellent corrosion resistance for marine/chemical environments
- Aluminum alloys: Lightweight with good strength-to-weight ratio
- Carbon steel: For high-pressure applications with protective coatings
Piston Components
- PTFE (Teflon): Low friction coefficient and chemical resistance
- PEEK: High temperature and chemical resistance
- Stainless steel: For high-load applications
Material Properties Comparison
| Component | Material | Key Properties | Typical Applications |
|---|---|---|---|
| Cylinder | 316 Stainless Steel | Corrosion resistance, high strength | Marine, chemical processing |
| Piston | PTFE | Low friction, chemical inertness | Food processing, pharmaceuticals |
| Yoke | Ductile Iron | High strength, impact resistance | Heavy industrial applications |
| Seals | FKM (Viton) | High temp resistance, chemical compatibility | Oil & gas, high temp processes |
Seal Materials
- NBR (Nitrile): Cost-effective general-purpose seals
- FKM (Viton): High temperature and chemical resistance
- Silicone: Wide temperature range flexibility
- EPDM: Excellent weather and ozone resistance
Material selection for scotch yoke actuators requires careful consideration of operating environment, pressure requirements, temperature ranges, and chemical exposure. The combination of metallic structural components with specialized polymers and elastomers creates actuators capable of performing reliably in diverse industrial applications.
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