Abstract: 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.

Abstract: 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 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.

Abstract: The new plant resulted as a mutation of the ‘Novaverpin’ cultivar (U.S. Plant Pat. No. 27,748) that was discovered as a chance sport while growing in a test garden at Colbert, Ga., U.S.A. Attractive light blue blossoms are formed in abundance with a propensity to rebloom following trimming in the absence of a vernalization requirement for flowering. An attractive dense compact and mounding growth habit is displayed. The stems that bear flowers are substantially upright. The ‘Novaverpin’ parent displays a dissimilar light pink inflorescence coloration. The plant is well suited for providing attractive ornamentation in the landscape.