Abstract: A thermally-actuated flow-restrictor device in an aircraft galley insert is provided that includes a housing formed of first and second flanged fittings. The first fitting includes an outlet port for connection to an aircraft galley insert, and the second fitting includes an inlet port for connection to an aircraft potable water supply. The second fitting also includes a boss surrounding the inlet port. A closure element contained within the housing includes a plurality of metals having different coefficients of thermal expansion. This allows the element to actuate depending upon the temperature of water contacting the closure element. When water having a predetermined temperature contacts the closure element, its surface facing the inlet port becomes convexly positioned proximal to the boss, thereby restricting the backflow of water through the flow-restrictor device. Once the closure element cools, its surface facing the inlet port becomes concave, resulting in normal device operation.

Abstract: A thermally-actuated flow-restrictor device in an aircraft galley insert is provided that includes a housing formed of first and second flanged fittings. The first fitting includes an outlet port for connection to an aircraft galley insert, and the second fitting includes an inlet port for connection to an aircraft potable water supply. The second fitting also includes a boss surrounding the inlet port. A closure element contained within the housing includes a plurality of metals having different coefficients of thermal expansion. This allows the element to actuate depending upon the temperature of water contacting the closure element. When water having a predetermined temperature contacts the closure element, its surface facing the inlet port becomes convexly positioned proximal to the boss, thereby restricting the backflow of water through the flow-restrictor device. Once the closure element cools, its surface facing the inlet port becomes concave, resulting in normal device operation.