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The Change™-HF protects and outperforms every other HF-Alky gasket on the market.

Flexibility of a proven spiral wound, low seating stress of a kammprofile
Graphite filled like a spiral wound, graphite faced like a kammprofile
Sigma PTFE inner ring barrier protects the flange from acid corrosion and also fills any existing corrosion damage
Unique wire profile stores more elastic energy to create better dynamic performance and superior load retention in cyclic applications
Excellent recovery (tested with 34% recovery @ 18K PSI [124 MPa], 30% compression)
No spring washers needed, no re-torque required
Cycle over & over, and maintain sealability

Brand Change HF
Flange Face Raised & Flat Face
Maximum Temperature 260°C / 500°F
Media Hazardous
Minimum Temperature -240°C / -400°F
Pressure 103 Bars / 1493.89 PSI
Pressure Class 150, 150 & 300, 300, 600
Pressure Rating PN PN10, PN16, PN25, PN40, PN64, PN100