Auxiliary Equipment

Purge Reduction Devices

Velocity Seals

Integral Piece of Equipment Within the Flare Tip
Does NOT Require a Dedicated Drain Line
Ensures O₂ Level Does Not Reach Over 6-8% Below the Velocity Seal Device

Gas (Buoyancy) Seals

Separate Piece of Equipment Below Flare Tip
Requires a Dedicated Drain Line
Ensures O₂ Level Does Not Reach Over 0% Below the Gas Seal Device

Liquid Seal Drum

Liquid seal drum is a safety device usually located in the stack base to prevent a flashback from entering the piping upstream of the flare.

Knockout Drum

Knockout drums are used to collect any liquid entrained in a waste gas stream.

KnockOut drum types include:

Separate / Stand-Alone (Horizontal or Vertical)
Integral in Stack Base (Vertical)

Combination Liquid Seal / Knockout Drum

The ZEECO combination liquid seal/knockout drum protects the flare header from air infiltration or flashback from entering the piping upstream of the flare (liquid seal) and is also used to remove and store condensed and entrained liquid (knockout drum).