Patent ID: 6595237
Filing Date: 2003-07-22
Classification: G05D,Y10T

Abstract:
A pressure regulator for a gas transport and/or distribution plant comprising:at least a valve having an inlet duct for high pressure gas (Pa), at least a delivery duct for low pressure gas (Pb) and a regulation shutter for the gas delivery flow, slidingly supported by a stem fixed to an elastic membrane belonging to a control head of said valve and defining an upper chamber and a lower chamber in said valve; at least a pilot valve for controlling the movement of said regulation shutter, said pilot valve defining a first chamber with an inlet way a first outlet way communicating with said delivery duct and a second chamber connected to said delivery duct in which the plug of an interception shutter adapted to open or close said inlet way is arranged; wherein said first chamber has at least a second outlet way communicating with said lower chamber and said upper chamber and said inlet way are connected to each other through an auxiliary duct containing gas at an intermediate pressure (Pm) between said high pressure (Pa) and said low pressure (Pb).