Patent ID: 8689813

Claim:
A valve for preventing freeze-fracturing, comprising: a housing coupled to a pipe port of a flow pipe through which a fluid flows; a draining chamber provided in a portion of the housing that faces the pipe port, wherein the draining chamber has therein a water inlet hole, which communicates with an inside of the flow pipe, and a water outlet hole, which communicates with an outside of the housing; a storage chamber provided in a portion of the housing that is opposite the draining chamber, wherein the storage chamber contains therein a phase change material, which decreases in volume while changing in phase from liquid to solid; and a plunger movably disposed in the draining chamber, wherein the plunger has a piston in one portion thereof, the piston being positioned inside the storage chamber such that the piston moves following a change in the volume of the phase change material, and a valve in the other portion thereof, the valve opening and closing the water inlet hole following a movement of the piston; wherein the draining chamber and the storage chamber are integrated to the housing, wherein the housing has a piston hole between the draining chamber and the storage chamber, the piston of the plunger being received inside the piston hole; and wherein the housing has a draining chamber stopper, which is screw-coupled to the draining chamber from an outside, the draining chamber stopper having the water inlet hole therein.