Sealpots are used as a barrier between the main line (flow meter) and the secondary instruments (transmitter or gage) in the measurement of steam or other vapors, which condense to a liquid state insuring compatibility with the secondary instruments. It is used to cool down very high temperature liquids. Sealpots are installed where the line fluid is corrosive or viscous to the extent where it cannot be permitted to contact the secondary instrument. It acts as a liquid barrier between the line fluid and the condensate.