An expansion valve 101 comprises a substantially prismatic-shaped valve body 301 made of aluminum alloy. On the valve body 301 is formed a first passage 32 through which a liquid-phase refrigerant travels towards an evaporator, and a second passage 34 through which a gas-phase refrigerant travels from...http://www.google.ca/patents/US6241157?utm_source=gb-gplus-sharePatent US6241157 - Expansion valve
