Tank assembly and methods for neutralization and decontamination of valves

A tank apparatus for treating a valve comprising:

• a container for holding a treatment fluid, the container having a plurality of side walls which surround an interior of the container, and the container also having an interior floor and an open upper end;
• one or more truncated V-shaped holding brackets for holding one or more flanged valves, each of the one or more truncated V-shaped holding brackets being attached in fixed position on an interior side wall surface of one of the side walls such that each of the one or more truncated V-shaped holding brackets is located in the interior of the container;
• a circulation fluid injection structure positioned in bottom of the interior of the container, wherein the circulation fluid injection structure comprises an array of conduit segments configured to inject circulating fluid into the interior of the container in order to circulate the treatment fluid;
• a grating structure positioned in the interior of the container, wherein the grating structure is positioned at an elevation that is above the circulation fluid injection structure, and wherein the grating structure is not positioned at an elevation where the grating structure would block the one or more truncated V-shaped holding brackets from receiving the one or more valves;
• each of the one or more truncated V-shaped holding brackets having an open upper end which is located below the open upper end of the container;
• and
• each or the one or more truncated V-shaped holding brackets further comprising (i) a horizontal lower segment which is attached to the interior side wall surface and which adds reinforcing strength to the truncated V-shaped holding bracket which resists side torque forces imparted when opening, disassembling, or manipulating a flanged valve held in the truncated V- shaped holding bracket and (ii) a pair of opposing side bracket segments attached to the interior side wall surface which diverge outwardly as they extend upwardly from the horizontal lower segment at a V angle in a range of from about 50° to about 70°, which is an angle effective to hold a flanged valve in fixed position in the truncated V-shaped holding bracket.