Chesterton 4400 Dual Concentric Gas Seal

Zero fugitive emission, monitoring exempt, dual gas seal design
Full sealing recovering following loss of barrier gas
Unique design minimizes profiled gas face wear due to loss of barrier fluid
Seal transitions to a contacting wet mode during gas disruptions for greater sealing reliability
In-Gland Control System (IGCS) dynamically tracks process pressure to minimize gas consumption
No heat generation
Designed for ANSI/API pumps, compressors, and blowers