Radiator pressure release valve for a temperature control system

A radiator pressure relief valve for transferring fluid from a radiator to an overflow bottle to relieve pressure in the radiator, the valve comprising:

• a housing defining an internal chamber;
• an inlet on the housing communicating with the chamber;
• an outlet on the housing communicating with the chamber;
• a ball located within the housing adjacent to the inlet, the ball being movable with respect to the inlet and adapted to prevent fluid flow from the inlet to the chamber when the ball is positioned against the inlet;
• a support pin located within the housing and movable with respect to the ball, the support pin having a first position where it is in contact with the ball and a second position where it is spaced apart from the ball;
• a piston slidably mounted within the housing and attached to one end of the support pin;
• a first spring located between the housing and the piston and adapted to bias the piston and the support pin into the first position in contact with the ball;
• and
• a second spring mounted between the ball and the piston and adapted to bias the ball away from the support pin.

A radiator pressure relief valve for transferring fluid from a radiator to an overflow bottle to relieve pressure in the radiator, the valve comprising:

• a housing defining an internal chamber;
• an inlet on the housing communicating with the chamber;
• an outlet on the housing communicating with the chamber;
• a valve member located within the housing adjacent to the inlet, the valve member being movable with respect to the inlet and adapted to prevent fluid flow from the inlet to the chamber when the valve member is positioned against the inlet;
• a support pin located within the housing and movable with respect to the valve member, the support pin having a first position where it is in contact with the valve member and a second position where it is spaced apart from the valve member;
• a first spring mounted within the housing for biasing the support pin into its first position in contact with the valve member;
• and
• a second spring mounted within the housing for biasing the valve member away from the support pin.