The series of SPF doors have the sliding wing and are equipped with pneumatic/oleo-dynamic type of movement. To insure the radiation seal on the external perimeter, the wings overlap, as to the opening passage, the length superior to at least ten times the existing distance between the shielding barrier and the fixed wall.
The door slides at approximately 5 mm of distance to the level of the floor. In this case the radiation seal is guaranteed by the specially designed shielding construction located at the base of the door, having a purpose of creating the sort of labyrinth between the door itself and the floor.
The SPF doors are operated by the double-acting pneumatic cylinder, which insures smooth, linear and extremely silent movement. The special oleo-dynamic circuit, along with the pneumatic cylinder, have two important functions: