Vacuum welding and brazing are essential joining technologies in aerospace manufacturing. They produce high‑strength, clean, oxidation‑free joints for critical structural components such as turbine blades, heat exchangers, fuel system manifolds, and lightweight alloy assemblies. In vacuum brazing, the process environment must be highly controlled to achieve metallurgical strength, minimal porosity, and uniform joints, especially when joining high‑temperature alloys and complex geometries. To deliver these outcomes, the vacuum pumping system must provide consistent, contamination‑free vacuum levels throughout the thermal cycle, from chamber evacuation and outgassing through high‑temperature hold and cooling. This article explains the role of vacuum pumps in aerospace welding and brazing applications, the specific vacuum technologies used, and how to engineer reliable pumping systems for high‑quality joining.

Space simulation and thermal‑vacuum testing are essential stages in the aerospace product development and verification process. These tests replicate the extreme vacuum and temperature conditions of outer space to ensure that satellites, spacecraft components, sensors, and avionics perform reliably under real mission environments. Central to this capability is a well‑engineered vacuum pump system that can evacuate large chambers to very low pressures while supporting thermal cycling and outgassing control. This article explains the core vacuum pump technologies used in space simulation and thermal‑vacuum (TVAC) testing chambers, the reasons behind their selection, and how the complete pumping system is configured for aerospace applications.