... than 20KN. It is used for testing the whole box anti-pressure, and stacking pressure. So it is ... packaging, quality-inspecting department and so on. With the functions of data-processing, display, memory, statistic, printing and ... can be used to Max. anti-pressure of box body.2.2 Pre-set valve testing: Users can ... pre-set the pressure vale, then test box’s anti-pressure and check it suitable or not ...