Space Airlock with a Hatch
A space station airlock serves as a pressurization chamber that allows astronauts to exit into open space without losing cabin air.
A4 format (portrait), black outlines on a white background · for home and classroom use
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Vertical Space Airlock and Hatch Mechanism
Airlock chambers function as pressurized doorways between the interior environment of a space station and open space outside. The vertical airlock assembly features a segmented outer body, strong exterior handles, and a round hatch door. Spacewalkers step into the chamber, seal the inner hatch, and pump out air before opening the outer hatch door. External handles support astronauts as they exit into the vacuum of space.
Spacewalk Preparation and Depressurization
Before exiting an airlock, astronauts spend considerable time breathing pure oxygen to eliminate nitrogen from their blood. This preparation prevents decompression sickness when working inside spacesuits maintained at reduced internal pressure. High-powered pumps transfer air from the airlock into storage tanks so no atmosphere is wasted.
Colors of a Space Airlock Assembly
- External body segments: white thermal cloth or metallic gray aluminum
- Round hatch door: light gray steel alloy
- Exterior handles: bright yellow or chrome silver
- Sealing gaskets: dark gray or black synthetic rubber