The Han Tribe's current beer bottling line was not producing much yet. It had only one pipe and one filling nozzle, so it could fill just one bottle at a time.
Moreover, the Han Tribe still had no electronic numerical-control technology. The frequency and speed of bottling, as well as the filling volume, were all controlled by the simplest physical methods. The research institute had wasted no small amount of time developing this one piece of technology.
Most of the metal pipes and valves the Han Tribe produced were manually operated. Filling a beer bottle was like holding it beneath a tap to catch water. An automated production line could not work that way, however. It had to solve the problem of filling the same measured amount of beer every time.
The Baijiu Factory had previously used funnels for manual filling. Since its output had not been large, hand-filling had been perfectly adequate. Beer was different, though.
To solve this problem, the research institute had specially invented a double-chamber valve. In other words, they had added a valve chamber between the pipe and the valve outlet. The chamber's volume was exactly the same as the volume of beer that needed to be filled.
The Han Tribe also used the modern standard measure for beer: each bottle held a net volume of 560 milliliters. Thus, the chamber inside the valve also had a volume of 560 milliliters.
When the filling operation began, the machinery automatically opened the inlet valve above the chamber and filled the valve chamber with beer. The upper inlet then closed again. At that point, opening the outlet below would pour the precisely measured 560 milliliters of beer into the bottle.
There was one final key problem: how could they ensure the beer would not foam during filling?