Low pressure cryogenic liquid delivery system

Details Low pressure cryogenic liquid delivery system Low pressure cryogenic liquid delivery system

B - Operations, Transporting

67

C

137/29, 222/96

B67C 3/12 (2006.01) F17C 9/00 (2006.01)

Patent

CA 1222231

LOW PRESSURE CRYOGENIC LIQUID DELIVERY SYSTEM ABSTRACT OF THE DISCLOSURE A low pressure delivery system for cryogenic liquids is disclosed, the system being capable of providing a stream of a single- phase cryogenic liquid at a substantially constant low pressure, in the range of about 1 psi. The system comprises a container into which a cryogenic liquid, from a high pressure source, is directed. The liquid in the container is maintained at a substantially constant level by an automatic filling mechanism. The liquid does not occupy all the space within the container, the remainder of the space being filled by gas evaporating from the liquid. This gas communicates, by a suitable conduit, with a pressure regulator valve. When the gas pressure exceeds a predetermined level, the valve opens, relieving the excess pressure. By thus placing an upper bound on the gas pressure, the system places an upper hound on the pressure of the liquid with- drawn from the container. The automatic filling mechanism of the system establishes a lower bound on the liquid pressure.

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