Used vertical stainless steel AISI 316 silos with a total capacity of 290 l. Tank has internal diameter 800 mm and length of straight side of wall 300 mm. Welded conical bottom slanted to one side is 850 mm high and has a central discharge outlet with mounted pneumatically operated butterfly valve by WAMGROUP type V2FS200AI with an internal diameter of 195 mm. In the conical bottom there are mounted two nozzles for blow off the cone from the inside. Top is welded and equipped with an inspection manhole with a cover with a diameter of 440 mm and 3 connections (1 x 150 mm and 2 x 100 mm). Tank is mounted on three lugs.