Flarex FXA Series Labyrinth gas seals

The Flarex Seal FXA series is located just below the flare tip and has been designed to prevent air ingress into hte flare riser thus preventing the formation of an explosion mixture in the system.

The Flarex seal is basically a gas inversion device causing the gas normally flowing in an upward direction to be turnback through 180 degrees and flow downward for a short lenght before being redirected through 180 degrees back in the original direction of flow. In a static condition, gases lighter than air will tend to collect in the upper bend sealing of the stack against the back flow of air. Heavier gases will tend to settle in the lower bend with the same effect. Some wind and atmospheric action will effect these interfaces slightly, also molecular diffusion of the two gases will take place at the interface.In order to counteract these effect a small continuous bleed of gas, dependent on the flame nominal diameter, must be maintained in order to ensure that the air does not penetrate the seal.

• Flarex Seals have a safety factor for momentary loss of purge gas.
• Lower purge gas rates.
• Cost savings on purge gas.
• No maintenance required.
• Robust construction.
• Flarex Seals can be used as a support for a flare tip lifting davit.