Dynamic control valve assembly

A control valve assembly for receiving and directing the flow of pressurized liquid carbon dioxide comprising:

• a valve body comprising a chamber, a liquid inlet cavity, a liquid storage port, and a gas outlet cavity;
• wherein the liquid inlet cavity is in fluid communication with the chamber;
• wherein the gas outlet cavity is in fluid communication with the chamber;
• wherein the liquid storage port is in fluid communication with the chamber;
• a valve stem assembly comprising a stem body having a first end and a second end, a first poppet interconnected to the first end, a second poppet interconnected to the second end, and a collar interconnected to the stem body between the first and second poppets;
• wherein the first poppet is disposed within the liquid inlet cavity and the second poppet is disposed within the gas outlet cavity;
• wherein the collar is adapted to form a flow gap for liquid carbon dioxide to enter the chamber from the liquid inlet cavity;
• and
• wherein the collar is adapted to be urged into the liquid inlet cavity by a reduction in pressure in the liquid inlet cavity.

A control valve assembly for receiving and directing the flow of pressurized liquid carbon dioxide and gaseous carbon dioxide, the control valve assembly having a closed position and an open position, comprising:

• a valve body comprising a chamber, a liquid inlet, a liquid inlet cavity, a liquid outlet, gas outlet, and a gas outlet cavity;
• a valve stem assembly disposed within the valve body comprising a stem body having a first poppet end, a second poppet end, and a collar between the first and second poppets;
• wherein the first poppet is disposed within the liquid inlet cavity and the second poppet is disposed within the gas outlet cavity;
• wherein the first poppet is adapted to prevent gaseous carbon dioxide from escaping through the liquid inlet in the closed position;
• wherein the second poppet is adapted to prevent liquid carbon dioxide from escaping through the gas outlet in the open position;
• wherein the collar is adapted to be urged into the liquid inlet cavity by a pressure reduction in the liquid inlet cavity;
• and
• wherein in the open position the flow of pressurized liquid carbon dioxide is directed to the liquid outlet and in the closed position the flow of gaseous carbon dioxide is directed to the gas outlet.