Valve body cast workblank pressure testing accessory

The utility model discloses a valve body cast workblank pressure testing accessory. The apparatus is arranged above a valve testing table, and a tested valve body valve body workblank is installed between the valve body cast workblank pressure testing accessory and the valve testing table. According to the utility model, when a valve body cast is roughly casted, after rough machining on three flanges, a pressure test can be carried out, the perforating defects of the valve body cast can be discovered at the first time, such methods as digging, repair welding, polishing and the like are adopted for repair, and the deformation generated when the valve body cast is heated is corrected during fine machining, such that the application qualification rate of the valve body cast is greatly improved.