Chesterton’s 4400 TwinHybrid™ Gas Seal

• Fits standard process pumps.
• No modifications or special operations training needed.
• Just pipe a clean gas supply to the gland and the seal is ready to run. Truly plug & play.
• Saves thousands of dollars in gas regulation support equipment.
• The 4400 features a self-contained and self-adjusting gas barrier regulating system inside the gland.
• No control panels needed.
• Supply multiple seals at a single initial cost by filtering upstream.
• Secure sealing even under system upset conditions.
• Automatically tracks process fluid pressure and maintains optimum pressure differential between gas barrier and process.
• Provides the simplicity of a cartridge single seal with the security and reliability of a dual configuration.
• TwinHybrid face design puts two sealing interfaces in a single seal ring set.
• Achieves instantaneous lift-off to prevent face wear during start-up.

This is the long-life, high-reliability gas seal that you’ve been waiting for. Now put it to work solving problems and saving money in your plant.

Chestertonton’s 4400 TwinHybrid™ Gas Seal takes gas seal technology out of the realm of the esoteric and into the practical world of process pumps. The 4400 provides all the benefits of gas seals, like zero emissions, long life and low power usage without the complexity or difficulties.

• No pump modifications are needed.
• Easy to use and easy to maintain.
• No external gas regulators required.

Chesterton’s 4400 TwinHybrid™ Gas Seal

Exclusive TwinHybrid™ design
TwinHybrid™ design provides dual seal functionality with single seal simplicity.

Hydrodynamic plus hydrostatic actions
The 4400 uses hydrostatic action to provide quick face separation at start-up and cushioned landings at shut down.This hydrostatic force is created by direct injection of the barrier gas into the confined annular space at the TwinHybrid faces.

Fits standard process pumps
No stuffing box modifications are required and requires less axial space than most cartridge single seals.

Uses common installation practices -No special training required
Installs as easily as a cartridge single seal. Just pipe a dry, filtered gas supply to the gland and the seal is ready to run. Truly plug & play.

No expensive control panels are needed
The 4400 In-Gland Control System features a self-contained and self-adjusting gas barrier regulating system.

• No control panels needed.
• Supply multiple seals at a single initial cost by filtering upstream.

Secure sealing under pressure upset conditions
The 4400’s In-Gland Control System automatically tracks process pressure and maintains optimum pressure differential between barrier gas and process pressures; even under upset conditions such as pressure surges or drops.

Reliable even under loss of barrier gas condition
If barrier gas is interrupted, the 4400 makes a controlled transition to liquid lubricated, contact sealing. Normal gas lubricated operation is re-established when barrier gas supply is restored. No need for shutdown or costly rebuilding.

O-ring hang-up problems are defeated
A combination of features make the 4400 less susceptible to O-ring hang-up than common gas seals, for greater reliability.

Field rebuildable
The 4400 cartridge design, with minimal parts and robust construction, can be rebuilt in the field if necessary.