These are vessel valves used mainly in Reaction vessel to completely flash material from the bottom of the vessel. It avoids unreacted material being left in the bottom outlet nozzles. It is specially made as upper opening or down opening depending on the space between the agitator and the bottom of the vessel.
Flash bottom are available in various sizes and Material of Construction in Stainless Steel only.
Note :- Seat of flush bottom valve is also provided with Teflon bush.