HIGH PRESSURE VALVE ASSEMBLY

摘要

A valve assembly for high pressure applications includes a pre-charge chamber in fluid communication with a first bellows, at least one inlet for pressurized gas to enter the assembly, a system poppet and an outlet for releasing pressurized gas into a desired environment. The pre-charge chamber and first bellows are filled with pre-charge gas to a threshold pressure. Pressurized gas can flow through access channels into a second bellows, which expands to move a valve shaft connected to the poppet assembly to open the poppet and allow the release of gas. The expansion of the second bellows pushes incompressible fluid disposed between the two bellows against the first bellows, thus contracting the first bellows. The gas within each bellows maintains an internal pressure equal to the pressure exerted upon each bellows by the incompressible fluid, so as to minimize differential pressure across the bellows in the extended position.

主权项

1. A high pressure valve assembly comprising:
a housing having a proximal end and a distal end; a pre-charge chamber having a first closed end disposed adjacent said proximal end and a second open end opposite said first closed end; a first bellows having a fixed open end operably and fluidly coupled to said second open end of said pre-charge chamber and a movable closed end opposite said fixed open end, said movable closed end of said first bellows being operably coupled to a first guide, wherein said pre-charge chamber and said first bellows are capable of collectively containing a pressurized pre-charge gas set at a threshold pressure value; a second bellows having a movable back end operably coupled to a second guide, and a fixed front end opposite said movable back end; an internal shaft operably connected to the second guide proximate said movable back end, said internal shaft being operably coupled to a system poppet assembly configured to alternatively seal and unseal an outlet in said distal end of said housing; at least one inlet disposed adjacent said distal end of said housing, said at least one inlet enabling a pressurized intake gas to enter said housing and flow through one or more access channels to exert a gas pressure against said movable back end of said second bellows; and a fluid compression chamber disposed between said first and second guides, said fluid compression chamber being filled with a substantially incompressible fluid to, in turn, operably connect said movable ends of both said first and second bellows, to form a reciprocating dual bellows assembly.