Valve of a storage tank for transporting oils or chemical compounds

摘要

A valve of a storage tank for transporting oils or chemical compounds avoids problems caused by crossing a suction path for external air with a pathway for outputting volatile gases from the storage tank. The valve includes an upper body having a circular inclined hole formed at its top surface; a lower body with an enforcing frame, a circular flange and connection bars; a stem formed at the bottom of the inclined hole at which a screw and a sleeve-shaped rod are formed; a disc having a boss supported by several enforcing spokes; a circular auxiliary plate connected to the screw of the stem; a bushing supporting a weight laid on top of the auxiliary plate; a lock nut fixing the auxiliary plate to the screw of the stem; and a cap having a hole into which the sleeve-shaped rod of the stem can be inserted and another hole in the cap connected to the first hole in the cap.