Filling stop valve
AssigneeMastavalve Pty. Ltd.
InventorPeter Henry Brougham
Life of this patent
Estimating the term…
Abstract
A stop valve to terminate flow of liquid there through when the level of the liquid reaches a desired level in a container. The stop valve includes a master diaphragm valve (38) to regulate the flow of liquid through the valve and a pilot diaphragm valve (10) controlling the master valve. The pilot diaphragm valve (10) is subject to the position of a float (37) on the liquid in the container.
Claims11
A stop valve to terminate the flow of liquid on the liquid passing from an inlet of the stop valve, through a valve seat, to an outlet discharging the liquid to a container, said stop valve terminating the flow on the liquid reaching a predetermined level in the container, said stop valve including a master valve diaphragm seatable on the valve seat to control the flow of liquid from the inlet to the outlet, said master valve diaphragm being controlled by a pilot valve diaphragm controlled by liquid level sensing means on the liquid passing through the stop valve into the container, wherein the master valve diaphragm and the pilot valve diaphragm enclose a common chamber when seated, and wherein the master valve diaphragm has a bleed from said inlet to apply inlet pressure to the common chamber when the master valve is seated to directly seat the pilot valve diaphragm against a second seat, and said liquid level sensing means includes a float and pushing means operatively connected between the float and said pilot diaphragm valve and extending through the second seat to directly unseat said pilot valve diaphragm in response to a low liquid level in said container to relieve pressure within the common chamber through at least one aperture in the pilot valve diaphragm and around at least a part of the pushing means and through the second valve seat.
A stop valve to terminate the flow of liquid to a container on the level of the liquid reaching a predetermined level in the container, said stop valve including a master valve diaphragm controlling the flow of liquid into said container, a float responsive to the level of the liquid in the container, and a pilot valve diaphragm responsive to the position of the float to permit or terminate a bleed through a bleed aperture depending on whether the pilot valve diaphragm is unseated or seated on the bleed aperture, wherein the master valve diaphragm and the pilot valve diaphragm enclose a common chamber when seated, the master valve diaphragm having a bleed orifice therethrough to expose the common chamber to inlet pressure when the master valve diaphragm is seated and thus be responsive to the position of the pilot valve diaphragm, whereby when the pilot valve diaphragm closes the bleed aperture under inlet pressure, the bleed through the bleed orifice in the master valve diaphragm increases pressure in the common chamber to close the master valve diaphragm on a seat opening to the container, and when the float unseats the pilot valve diaphragm to open the bleed aperture, the pressure in the common chamber is relieved through at least one opening in the pilot valve diaphragm and the bleed aperture, and the master valve diaphragm opens from the seat due to inlet pressure acting on the master valve diaphragm outside of the common chamber.
Dependencies are inferred from the claim text.