Cryogenic valve

A cryogenic valve comprising:

• a first port and a second port;
• a valve body comprising a valve seat defining a fluid orifice in fluid communication with the first port;
• a valve stem configured to engage with the valve body, wherein the valve stem comprises a first end and an opposite second end with a longitudinal axis extending through the first end and second end, wherein the valve stem forms a first channel extending substantially along the longitudinal axis, the first channel configured to allow fluid flow through the valve stem;
• a sealing member;
• a valve element positioned within at least a portion of the first channel, the valve element configured to bias the sealing member against the orifice to substantially block flow through the orifice and the first port;
• a valve actuator comprising a solenoid coil configured to move the valve element when the solenoid coil is at least one of activated and deactivated, wherein the bias is controlled in response to control of the position of the valve element by the valve actuator;
• a shell configured to enclose the solenoid coil;
• and
• a housing configured to substantially protect at least an engagement portion of the valve body and valve stem and surround the shell, and form an inner housing cavity separating the shell from the surrounding housing, the inner housing cavity configured to thermally isolate at least a portion of the solenoid coil, valve body and valve stem, including said engagement portion, from the housing.

A cryogenic valve comprising:

• a first port and a second port;
• a valve body comprising a valve seat defining a fluid orifice in fluid communication with the first port;
• a valve stem configured to engage with the valve body, wherein the valve stem comprises a first end and an opposite second end with a longitudinal axis extending through the first end and second end, wherein the valve stem forms a first channel extending substantially along the longitudinal axis, the first channel configured to allow fluid flow through the valve stem;
• a sealing member;
• a valve element positioned within at least a portion of the first channel, the valve element configured to bias the sealing member against the orifice to substantially block flow through the orifice and the first port;
• a valve actuator comprising a solenoid coil configured to move the valve element when the solenoid coil is at least one of activated and deactivated, wherein the bias is controlled in response to control of the position of the valve element by the valve actuator;
• a shell configured to enclose the solenoid coil;
• and
• a housing configured to substantially protect at least an engagement portion of the valve body and valve stem, and form an inner housing cavity, the inner housing cavity extending outwardly from the shell relative to the longitudinal axis, and positioned between the housing and the shell, the inner housing cavity configured to thermally isolate at least a portion of the solenoid coil, valve body and valve stem, including said engagement portion, from the housing.