Vapor recovery unit:

A system composed of a scrubber, a compressor and a switch.

Its main purpose is to recover vapors formed inside completely sealed crude oil or condensate tanks.

the switch detects pressure variations inside the tanks and turns the compressor on and off.

The vapors are sucked through a scrubber, where the liquid trapped is returned to the liquid pipeline system or to the tanks, and the vapor recovered is pumped into gas lines.