The improvement in capacity can exceed 13% in spray regime services with low-to-moderate weir loadings. MINIVALVE® valves exhibit a more uniform froth action on the tray deck compared to full-size valves. They are offered in both fixed (VG-0) and moveable (MV-1) styles.
MINIVALVE valves are directional with the rear leg being a little wider than the downstream front leg. This gives a slight pushing action to the liquid as vapor passes through the valves.
The liquid push assists in maintaining a more uniform flow pattern on cross-flow trays with less retrograde action. It also helps offset vapor cross-flow channeling effects to a small degree.