1. Particle filter for inlet/outlet
2. holes for the gloves in front window
3. antechamber
4. pressure regulation
5. solenoid valve or bubbler
6. vacuum pump
7. oxygen sensor
8. moisture sensor
9. three way valve on antechamber
10. solvent filter
11. reactor
12. blower
13. cooler

A glove box is usually made out of stainless steel but there also versions made of transparent polymer. There is at least one window with two holes (2) for the gloves. The inert atmosphere inside is constantly circulated through the purification system. Two HEPA dust filters (1) for the intake and output inside the box prevents dust from getting into the purification system and out of it. They have to be replaced on a regular basis. A system to monitor the pressure (4) inside the box uses data from pressure sensors to hold the pressure within predefined (and to a degree customizable) boundaries. If the pressure drops below the defined value, a solenoid valve is opened to increase the pressure with fresh inert gas. If the pressure rises over the threshold itn eeds to be relieved. This is either done by opening a solenoid / pneumatic valve, a bubbler or via the vacuum pump (6). The excess gas is then let out into the exhaust. A proper exhaust is needed to prevent harmful substances from the released gas getting into the room and also to prevent the buildup of an oxygen deprived atmosphere inside the room. This needs to be considered when looking for a place to install a glove box!