The utility model belongs to the technical field of
food packaging, and particularly relates to a high-precision stainless steel flow valve for
food packaging machinery, which comprises an injection
barrel and a flow control shaft, a
temporary storage cavity is formed between a canning head and a plug which are arranged on the injection
barrel, and a feeding hole and an air tap are arranged on the injection
barrel at the
temporary storage cavity. The flow control shaft piece is arranged in the material injection barrel, a plugging head and a limiting plugging block are arranged on a screw rod arranged at one end of the flow control shaft piece, an adjusting air bag is arranged between the plugging head and the limiting plugging block, and the adjusting air bag is communicated with the air
nozzle through an air
pipe. According to the utility model, the adjusting air bag is arranged on the flow control shaft piece in the material injection barrel to flexibly adjust the volume of the temporary
material storage cavity, and the volume of the adjusting air bag is adjusted by inflating and deflating the adjusting air bag, so that the flexible adjustment of the volume of the temporary
material storage cavity is realized, the use convenience is improved, and the use range is expanded; and wide-range popularization and application can be realized.