Chesterton 4400 Dual Concentric Dry Gas Seal

Chesterton 4400 Dual Concentric Dry Gas Seal
Accommodates Loss of Barrier Gas for Greater Sealing Reliability

​​​​​A.W. Chesterton Company has developed technology that makes the use of a dry gas seal easy and intuitive. The 4400 delivers higher reliability with lower gas consumption than conventional gas-lubricated seals.

  • Transitions to a traditional liquid seal in the event of the loss of barrier gas and recovers to a gas seal upon restoring the barrier gas
  • Compact flush mount design that does not require modification of the stuffing box; fits more equipment types than conventional gas seals
  • Innovative in-Gland Control System (IGCS) dynamically controls gas pressure to process pressure​

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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
Operating ConditionsMaterials
Sizes25 mm to 90 mm (1.00" to 3.625")FacesCB, SSC
Pressure711 mm (28") Hg Vacuum to 20 bar g (300 psig)ElastomersFKM, EPDM, FEPM, ChemLast™
Temperature55° C to 300° C (-67˚ F to 570˚ F)Metals1.4401 (316SS)
Speed25 m/s (5000 fpm)Springs2.4819 (Alloy C-276)
Fits ISO-3069-C
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Technical Material Reference (English)https://chestertondocs.chesterton.com/Rotating/EN23875_Technical_Material_Reference.pdfTechnical Material Reference (English)pdf
Catalog: Rotating Equipment Solutions - Mechanical Seals, Pump Packing, Gaskets, and More (English)https://chestertondocs.chesterton.com/Rotating/RotatingCAT.pdfCatalog: Rotating Equipment Solutions - Mechanical Seals, Pump Packing, Gaskets, and More (English)pdf
Environmental Control Plans (English)https://chestertondocs.chesterton.com/Rotating/EN23873_MS_Enviro_Control_Plans.pdfEnvironmental Control Plans (English)pdf
Installation Instructions: 4400 (English)https://chestertondocs.chesterton.com/Rotating/si4400_EN.pdfInstallation Instructions: 4400 (English)pdf
Article: What Determines Seal Leakage? (English)https://chestertondocs.chesterton.com/Rotating/What Determines Seal Leakage.pdfArticle: What Determines Seal Leakage? (English)pdf