Abstract: A pilot mechanism for a pressure regulating valve having a relatively high pressure inlet, a relatively low pressure outlet and main valve pressure responsive means for operating the main valve to control the pressure of the fluid downstream of the main valve. The pilot mechanism comprises pilot valve means for supplying a loading fluid to one side of the main valve pressure responsive means. A normally closed bleed leakage path is provided in communication with the loading fluid supplied to the main valve pressure responsive means for directing loading fluid away from the main valve pressure responsive means when the bleed path is opened. Second pressure responsive means are provided responsive to the pressure of the fluid to be controlled for controlling the position of the pilot valve means to in turn control the flow of loading fluid supplied to the main valve pressure responsive means.

Abstract: An improved plug assembly for seating against a valve seat, the plug assembly being usable in a movable plug valve which controls the flow of the fluid through a conduit. The plug assembly includes an arm member, a plug member and biasing means. The arm member is adapted to be mounted for movement in the conduit and has an enlarged head. The plug member has a first face for sealingly engaging the valve seat and a rear face. The plug member further includes a recessed opening in one of the front and rear faces for receiving and retaining the enlarged head of the arm member for relative movement with respect thereto. The biasing means is disposed in the recessed opening and normally urges the enlarged arm head and the plug member into tight engagement with one another.