Patent ID: 6981515
Filing Date: 2006-01-03
Classification: F16K,Y10T

Abstract:
1. A normally-open balanced valve comprising: a valve body comprising an inlet port and an outlet port, said valve body further comprising a first side and a second side, said first side and said second sides each provided with apertures, wherein the aperture in said first side is larger than the aperture in said second side wherein said aperture in said first side is provided such that said normally open balanced valve is capable of being converted into a three-way valve, said valve comprising a portion extending between said first side and said second side for dividing the valve into an inlet chamber and an outlet chamber, said valve provided with a plug provided in a position such that an opening between the inlet chamber and the outlet chamber is normally open, said plug having a first side and a second side, said plug provided with a pressure port allowing fluid to flow from said second side of said plug side of said plug to said first side of said plug into a pressure chamber provided in said valve such that fluid flows from said inlet chamber through said port into said pressure chamber to balance the fluid pressure on said plug, and a stem connected to said first side of said plug for moving said plug into a closed position when actuated.