Patent ID: 7080660
Filing Date: 2006-07-25
Classification: F16K,G05D,Y10T

Abstract:
1. A relief valve comprising: a process housing including a process surface, a process void adapted to be disposed in fluid communication with a fluid at a process pressure, and a plurality of vent voids, each of said vent voids including the entire open area within a closed outer boundary thereof, wherein said vent voids are disposed in parallel flow communication with said diaphragm; a reference housing adapted to be disposed in fluid communication with a fluid at a predetermined reference pressure and including a reference surface; and a diaphragm disposed between said process housing and said reference housing and arranged such that, when said reference pressure is higher than said process pressure said diaphragm is engaged with said vent void, and when said process pressure is higher than said reference pressure by an amount of about 0.25 PSI or less, said diaphragm is disengaged from at least one of said vent voids; wherein a diaphragm movement gap between said process housing and said reference housing is about 3 percent or less man a free diameter of said diaphram.