Patent ID: 6402820
Filing Date: 2002-06-11
Classification: B01D,E21B,F15C,G05D,Y10T

Abstract:
A pressure vessel containing a reservoir of fluid and having a valve controlling an outlet of the vessel and wherein there is a pressure differential across said valve beyond any hydrostatic pressure head of the reservoir fluid, the vessel comprising a system for the control of the level of reservoir fluid in the reservoir, the system comprising said valve being a fluidic valve and having an outlet port and at least two control ports either or both of which control ports may serve to inlet fluid into the fluidic valve, the inlets being arranged at different levels in the reservoir, whereby the valve has resistance to flow of fluid therethrough which is controlled by flow of said fluid into the control ports, such that said resistance is minimised when flow of fluid in the control ports is substantially equal, and wherein the flow out of the outlet is substantially equal to the combined flow into each control port.