F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
Dispositif de fermeture d'une ouverture d'une enceinte et d'acces a cette derniere, comportant des moyens empechant l'acces a l'enceinte lorsque celle-ci est sous pression