US98A，UE95A
The Pneumatic Lifeline: Why the Wrong PU Tubing Choice Kills Your Machine
In dynamic automation, the tubing is often dismissed as a commodity. Yet, it is the "lifeline" that dictates the health of every actuator. AirTAC's US98A and UE95A Polyurethane (PU) series are strategic engineering answers to the physical failures—kinking, leaking, and degradation—that haunt production floors.
The genius of this series lies in the "Dual Chemistry" approach. By offering both Polyester and Polyether formulations, AirTAC provides a targeted weapon for every industrial environment. Are you dealing with CNC oil mist or a -40°C food freezing tunnel? Stop compromising and invest in the chemistry designed for your specific battlefield.
1. The Chemistry Battle: Polyester vs. Polyether
Choosing between the two is the most critical decision an engineer can make. While both share high elasticity, their molecular backbones react differently to moisture and chemicals.
Polyester-Based: The US98A Industrial Workhorse
Strengths: Mechanically superior with higher tensile and tear strength. It is exceptionally resistant to oils and standard industrial solvents.
Weakness (Hydrolysis): In humid or washdown zones, ester bonds react with water, causing the tube to soften and degrade over time. It is strictly for dry air environments.
Polyether-Based: The UE95A Environmental Specialist
Strengths: Highly resistant to water (Anti-Hydrolysis) and microbes. It retains flexibility at extreme low temperatures and is essentially immune to moisture degradation.
Weakness: Slightly lower mechanical burst pressure compared to Polyester, but necessary for food processing or outdoor use.
2. Technical Performance: Engineering Boundaries
Both series handle standard factory air at 1.0 MPa (145 psi) at 23°C, but their survival limits diverge as the environment changes:
- US98A Temperature Limit (-20°C): Below this point, Polyester becomes brittle and risks fracture under dynamic motion.
- UE95A Temperature Limit (-40°C): The Polyether formulation is winterized, maintaining its high elasticity in cold storage or extreme outdoor conditions.
- Burst Margin: US98A typically offers a 3.0 MPa burst pressure, while UE95A holds firm at 2.5 MPa, reflecting the higher mechanical strength of the Polyester base.
⚠️ CRITICAL SELECTION TIP:
Always use UE95A (Polyether) if your system involves water contact, high humidity, or temperatures below -20°C. Using US98A in these conditions leads to silent molecular degradation that results in sudden, catastrophic leaks.
3. Design for Maintenance: The Power of Color
AirTAC's variety of colors (Clear, Black, Blue, Red, Yellow, Green) is more than aesthetic—it is a functional safety tool. High-efficiency facilities utilize color-coding to drastically reduce Mean Time To Repair (MTTR):
- Red: High-pressure supply lines.
- Blue: Control/Vacuum lines.
- Clear: Visual confirmation for air quality or oil contamination.
4. Technical FAQ for Engineers
1. Which tubing is best for high-friction drag chains?
US98A (Polyester) is the superior choice. Its Shore A98 hardness provides significantly higher abrasion resistance when the tube is constantly rubbing against other lines or the cable carrier.
2. Can I use US98A for a -30°C application?
No. You must switch to UE95A (Polyether), which is rated down to -40°C. Polyester will crystallize and crack at those temperatures.
3. What is the standard filtration requirement?
To prevent internal clogging of micro-valves and protect the tubing inner wall, use a standard 40μm filter. For precision systems using small bore tubing (under 4mm), we recommend 5μm filtration.
The Strategic Choice
AirTAC PU tubing is not a commodity; it is a precision-engineered solution. By matching the formulation—US98A for dry mechanical strength and UE95A for environmental resilience—you eliminate the most common failure mode in automation. Invest in the lifeline that is built to endure.