초록 ▼

A precision high-pressure control assembly for supercritical fluids comprises a continuous flow system having a pressure control loop which includes a source of fluid communicating with a piston driven pump. A pressure sensor monitors the pressure of the supercritical fluid in the outlet line of the

A precision high-pressure control assembly for supercritical fluids comprises a continuous flow system having a pressure control loop which includes a source of fluid communicating with a piston driven pump. A pressure sensor monitors the pressure of the supercritical fluid in the outlet line of the pump. A pressure controller has an input for receiving a signal relating to the pressure sent by the pressure sensor and the pressure controller yields an electronic output signal to an electropneumatic regulator. A source of air communicates with the electropneumatic regulator to provide pressurized regulated driver air directed to the pump. The electropneumatic regulator controls the regulated driver air pressure of the pump in accordance with the signal received from the pressure controller. The piston head of the pump is in a cryogenic chamber to minimize flash and cavitation.

대표청구항 ▼

[ What is claimed is:] [1.] A precision high-pressure control assembly for supercritical fluids comprising a continuous flow system having a pressure control loop which includes a source of fluid, said source of fluid communicating with a pump head of a piston driven pump for compressing the fluid a

[ What is claimed is:] [1.] A precision high-pressure control assembly for supercritical fluids comprising a continuous flow system having a pressure control loop which includes a source of fluid, said source of fluid communicating with a pump head of a piston driven pump for compressing the fluid and increasing the pressure of the fluid to create a supercritical fluid, an outlet line leading from said pump head, a pressure sensor monitoring the pressure of the supercritical fluid in said outlet line, a process controller having an input for receiving a signal relating to the pressure sensed by said pressure sensor, said process controller yielding an electronic control output signal to a regulator, a source of air communicating with said regulator to provide pressurized regulated driver air directed to said pump, said regulator controlling the regulated driver air pressure of said pump in accordance with the signal received from said process controller, and said pump head being in a cryogenic chamber for minimizing flash and cavitation.