Zone Valve Box SZKG enable closing / opening the flow of medical gases, constant pressure control medical gases and provides emergency power to connect to the service area in the event of failure of the central supply medical gases. SZKG boxes that are installed for each operating room, the halls of intensive care, resuscitation rooms, and individual offices (floors). Each box has a lock that allows opening it with a key that is the same for all mounted on an object boxes. In an emergency, you can open the box with a punch in the castle. Information that is placed on a box inside the lock.