Abstract: An immersion type vapor degreaser has a tank divided by an upright partition into an immersion chamber and a boiling chamber and defining a vapor zone thereabove. A roof panel on the tank covers the top of the boiling chamber, and the open mouth of the tank is provided with condensation means above the immersion chamber for condensing vaporized degreasing solvent. A drip plate is positioned above the partition, and is movable to cover the immersion chamber at an angle sloping upwardly from the partition and extending out over the immersion chamber. A motor drive is provide for moving said drip plate to an open position to expose the immersion chamber in response to an open signal. The purpose of this arrangement is to drastically decrease the vapor interface with the atmosphere n so as to reduce solvent emission. The function of the drip plate is to channel dirty solvent which condenses and drops from dirty parts back into the boiling chamber.