Abstract: A valve includes a valve housing defining a fluid flowpath therethrough, a valve element located in the valve housing and movable in the fluid flowpath to regulate a fluid flow therethrough, and a valve actuator operably connected to the valve element to urge movement of the valve element in the fluid flowpath. The valve actuator includes an actuator housing, a volume of paraffin located in the housing, and an actuator rod located in the actuator housing and operably connected to the valve element, such that phase change of the paraffin urges movement of the actuator rod between a first position and a second position, thereby moving the valve element between a retracted position and an extended position.

Abstract: A valve is provided and includes a valve body defining a pathway, a diaphragm and a wire. The diaphragm is configured to assume first or second conditions in which the diaphragm blocks or permits fluid flow through the pathway, respectively. The diaphragm is biased toward assumption of the first condition. The wire is coupled to the diaphragm. The wire has an uncontracted length in an unheated state whereby the wire permits assumption of the first condition by the diaphragm due to the bias and a contracted length in a heated state whereby the wire pulls the diaphragm toward assumption of the second condition in opposition to the bias.

Abstract: A valve includes a valve housing defining a fluid flowpath therethrough, a valve element located in the valve housing and movable in the fluid flowpath to regulate a fluid flow therethrough, and a valve actuator operably connected to the valve element to urge movement of the valve element in the fluid flowpath. The valve actuator includes an actuator housing, a volume of paraffin located in the housing, and an actuator rod located in the actuator housing and operably connected to the valve element, such that phase change of the paraffin urges movement of the actuator rod between a first position and a second position, thereby moving the valve element between a retracted position and an extended position.

Abstract: A valve is provided and includes a valve body defining a pathway, a diaphragm and a wire. The diaphragm is configured to assume first or second conditions in which the diaphragm blocks or permits fluid flow through the pathway, respectively. The diaphragm is biased toward assumption of the first condition. The wire is coupled to the diaphragm. The wire has an uncontracted length in an unheated state whereby the wire permits assumption of the first condition by the diaphragm due to the bias and a contracted length in a heated state whereby the wire pulls the diaphragm toward assumption of the second condition in opposition to the bias.