Velocity Seal oil

[0605]

Пожалуйста, помогите перевести.velocity seal

Выражение встречается в следующем контексте:часть flare stack.

Ensure a positive purge gas flow at all the time. This is required for purging Velocity Seal at the flare stack.
Заранее спасибо

[D-50]

Molecular seals and Velocity or fluidic seals are used to limit the required "sweep flow" or "purge flow". A "sweep flow" is required to prevent air impingement in the process header when there is little or no process flow going to the flare. Should air enter the Flare or vent header, a release of process gas could result in a combustible mixture present within a restricted area. The ignition of this gas - air mixture can result in an explosion, and cause severe equipment damage.

The velocity seal is much lower in cost than the molecular seal. Located in the base of the flare tip, it reduces the purge or sweep rate by 30%. Constructed of either carbon steel or 304 Stainless the seal remains out of the flame zone. Multiple seals can be used for increased efficiency. The seal is equipped with drain holes to prevent rain or condensation from collecting, and damaging the flare tip wall.

[0605]

Thank you!!!