• High concentration black liquor
• Hard-to-seal monomers such as actrylonitrile and vinyl chloride
• Potentially solidifying liquids and latex

CHESTERTON’s 280 Heavy Duty Dual Cartridge Seal

• Every O-ring is located on the OD of the seal ring to prevent compression hang-up under elevated temperatures.
  • All move on a clean micro-polished surface to reduce hysteresis.
• Inboard shroud provides physical protection to the seal ring and a smooth surface for O-ring travel.
• Inboard rotary and stationary faces.
  • Dynamic stress-relieving seal rings with rotating narrow face designed to prevent contaminant intrusion.
• Barrier fluid channel with built-in cutwaters for enhanced pumping action and fluid exchange.
• Large bore barrier fluid ports provide high capacity cooling.
• Increased radial clearances provide efficient barrier fluid flow and heat removal.
• Outboard stationary and rotary faces, identical to inboard set for simple assembly, low replacement inventory.
• Corrugated graphite cushioned drive prevents face damage from high torque start-ups and viscous shearing forces.
• Revolutionary Unified Seal Face Alignment™ requires only one set of springs to provide constant loading of all four faces.
  • Springs are isolated from process and barrier fluids.
• Centering clips locate the stationary seal rings directly to the shaft for a truly centered seal - No risk of sleeve contact with stationary seal parts.
• Patented Self-Centering Lock Ring™ mechanism locks the 280 to the shaft, automatically alligning the faces with the shaft.
• The revolutionary Unified Seal Face Alignment™ allows all 4 faces to maintain perpendicularity to the shaft centerline and minimize the effects of stuffing box face misalignment.