Abstract: An electrically operated valve having a valve body in which a valve member is mounted for movement to an open or closed position, an operating assembly being removably mounted on the body and including a heat motor that is offset with respect to the axis of the valve member and that is operable to effect movement of the valve member against the action of a control spring as also mounted in the operating assembly, the heat motor having a thermal switch mounted directly thereon for controlling current to the heating element thereof and thereby protecting the heat motor for increased life thereof.

Abstract: A valve construction for controlling the flow of a fluid therethrough and including a restrictor member that is located in a control chamber and that communicates with the control pilot valve and an interior chamber having access to a pressure responsive diaphragm, the restrictor member providing for sufficient flow of fluid to the interior chamber in relatively large valve sizes to enable the diaphragm to open or close the valve at a reasonable valve closing rate, the closing of the valve being slow enough to prevent the occurrence of water hammer in the system.