Miniature passive thermal control valve for mixing or splitting single-phase fluid with adjustable thermal actuator

A passive thermal control valve comprising:

• a thermal actuator comprising:
• an actuator body having an inner bore;
• an adjustment stop engaging the actuator body;
• a cylinder received within the inner bore of the actuator body, the cylinder having a cylinder bore open at one end;
• an actuator spring within the actuator body biasing the cylinder towards the adjustment stop;
• a rod having a first end and a second end, the rod at least partially received within the cylinder, at least a portion of the rod allowed to extend through the open cylinder bore;
• a bellows within the cylinder extending over a portion of the rod, a bellows first end sealingly affixed to a first end of the rod and a bellows second end affixed to a top flange of the cylinder;
• and
• a thermal fluid contained within the cylinder on the outside of the bellows;
• and
• a valve body coupled to the actuator body, the valve body having first and second ports;
• a lever mechanism connected to the valve body, the lever mechanism comprising a lever having first and second ends and a medial portion, the lever first end pin-connected to the valve body;
• a valve spool connected to the lever second end, the valve spool arranged and designed to close the first port and allow a system fluid to flow through the second port, close the second port and allow the system fluid to flow through the first port, or allow the system fluid to flow through both the first and second ports.