Patent ID: 7681590

Claim:
A process apparatus, comprising: a chamber; a pump; and a transportation system set between the chamber and the pump, comprising: a pipe including an input end and an output end, wherein the input end is connected to the chamber, the output end is connected to the pump, and the pump is adapted to pump fluids out of the chamber through the pipe; a pressure control valve disposed on the pipe and positioned between the input end and the output end, wherein the pressure control valve comprises a valve plate adapted to adjust a fluid flow in the pipe; and a shielding unit disposed on the pipe and positioned between the input end and the pressure control valve, wherein the shielding unit comprises a shielding plate adapted to be switched between an original position and a shielding position, and the shielding plate permits conveyance of the fluids in the pipe and partially prevents liquid particles of the fluids floating in the pipe when the shielding plate is located at the shielding position.