Relief valve assembly with anti-frozen shielding hat

A relief valve assembly, comprising:

• a relief valve including a valve body having a valve chamber and a slide member configured to move inside the valve chamber;
• a hollow shell disposed to an outer surface of the valve body in order to form a relieving chamber between the relief valve and the hollow shell, wherein the hollow shell has a distal aperture and a proximal aperture, and a distal end of the valve body is inserted into the hollow shell through the proximal aperture and protrudes through the distal aperture;
• and
• a cap mounted to the hollow shell and configured to close off the distal end of the valve body to an external environment;
• wherein the relief valve includes at least one relief port forming a fluid flow path between the valve chamber and the relieving chamber, the hollow shell extends past the at least one relief port along a longitudinal axis of the valve body, and the slide member moves in response to an over-pressure condition, thereby allowing a fluid to vent from the valve chamber to the relieving chamber through the at least one relief port.