treatment valve 31 and allows hollow tube 26 to rotate with respect to mandrel treatment valve 31 mandrel treatment valve 31 is comprised of mandrel treatment valve body 22 mandrel treatment valve rotor 23 seals 24 and servo 32 mandrel treatment valve body 22 has three ports that are connected to rotary joint 30 steam source 7 and vacuum source 6 mandrel treatment valve rotor 23 is ported to allow rotary joint 30 to be connected to steam source 7 vacuum source 6 or isolated from the environment in a closed position mandrel treatment valve rotor 23 is connected to servo 32 which allows it to be precisely and rapidly positioned to the steam vacuum and closed positions described all components are designed to minimize and preclude the possibility of superheat with reference to fig2 a 2 b 2 d and 6 the material to be treated is first inserted into the chamber 4 through the upper body opening 11 where it rests on the screen 9 treatment valve rotors 3 are in a position such that the openings 16 are not aligned with the openings to either the vacuum 6 or to the treatment gas 7 in the headplates 8 the treatment valves 2 are said to be in the closed position the product valve rotor 3 then rotates through 90 degrees aligning the product chamber 4 with the treatment control valves 2 seals 13 isolate the treatment chamber from the environment with reference to fig2 d 2 e 2 f 3 4 5 6 7 8 9 and 10 the treatment valve rotor 5 then rotates from the closed position to the vacuum position fig2 d and 2 e.