EntityQ2657372· pop 12· linked from 29 articlessun valveSign in to savevalve used to automatically control gas flow in lighthousesConnectionsThomas EdisonEntitylighthouseEntityNobel Prize in PhysicsEntityZanzibar IslandsEntityGustaf DalénEntityelectrical switchEntityphotovoltaicsEntitybimetallic stripEntityDalén lightEntityFlow control valveEntityChumbe LighthouseEntityCategoriesValves