Cryogenic fluid shut-off valve

A shut-off valve for use with cryogenic fluids, the shut off valve comprising:

• a body including a valve inlet, a valve outlet, and one or more internal surfaces that define at least one void in fluid communication with the valve inlet and the valve outlet;
• a valve seat defined the one or more internal surfaces of the body;
• a housing connected to the body,
• a valve spindle disposed within the housing, the valve spindle including a seat disc configured to sealingly engage with the valve seat;
• and
• a buffer composed of a cryogenic temperature resistant material circumferentially surrounding and connected to at least a portion of the valve spindle and slidingly engaged with an internal surface of the housing, wherein the buffer comprises a plurality of buffer members, and wherein each buffer member of the plurality of buffer members comprise a plurality of outer surfaces that define a notch around a first circumference of a first portion of the buffer member and a buffer collar around a second circumference of a second portion of the buffer member opposite the first portion.

A shut-off valve for use with cryogenic fluids, the shut-off valve comprising:

• a body defining a valve inlet, a valve outlet, at least one void, and a valve seat, wherein the at least one void is configured to be in fluid communication with the valve inlet and the valve outlet;
• a housing including an internal surface and connected to the body;
• a valve spindle disposed within the housing and including a seat disc configured to sealingly engage the valve seat, wherein the valve spindle comprises a spindle collar;
• and
• a buffer circumferentially surrounding and connected to at least a portion of the valve spindle and slidingly engaged with the internal surface of the housing, wherein the buffer defines a notch extending circumferentially around a bottom portion of the buffer, and wherein the spindle collar of the spindle collar extends into the notch to align and position the buffer around the valve spindle.