Vacuum Density
PTC vacuum density device is indispensable part of quality control labs with has unique measurement and interface capabilities. It designed as an modern labrotary equipment includes heat and vacuum chambers, HMI interface, USB output, high sensitive scale, sample holder, satine stainless steel working table, cooling beaker and auxiliary equipments. It’s covered high strength solid carbon plastic to protect the equipments from environmental effects.
-
PLC based full automatic control
-
± 0,01 gr. weighting precision
-
± 1 mBar vacuum precision
-
USB interface for external data record
Mini Vacuum Density
According to necessities of the sector PTC developed a compact and portable measurement device to handle the process more fast.
How is degassing
efficiency measured
Over the years, a number of test methods have been developed for hydrogen and in-clusion detection in liquid aluminum. Among those, the most common use is RPT analysis. RPT analysis is both simple and sensitive to gas and inclusion content. Side image shows the result of degassing sam-ples at some values of density index.
RPT Analysis
Reduced pressure test ( RPT ) to determine the po-rosity level of the cast. The mplten alloy
(~120 g) is poured into a preheated thin-walled iron vessel and solidified under reduced pressure of 80 mBar. The densities of the RPT samples are determined by the density measurement method. The sample is weigghed in air and water. The sample is weighed in air and water. The density of the sample D is given in the rfollowing equation.