Multiple regulator vacuum delivery valve assembly
AssigneePraxair Technology, Inc.
InventorDouglas Charles Heiderman
Life of this patent
Estimating the term…
Abstract
This invention is directed to an apparatus for controlling the discharge of pressurized fluids from the outlet of a pressurized vessel, and particularly directed to multiple fluid regulating devices within the vessel for storing and controlling the flow of fluid or gases out of the vessel.
Claims20
An apparatus for controlling the discharge of pressurized fluids from the outlet of a pressurized vessel, the apparatus comprising:
- a. a port body for communication with the outlet of a pressurized tank defining a fluid discharge path;
- b. a valve element fixed in or upstream of the port body and adapted for movement between a sealing position that blocks fluid flow through the fluid discharge path and an open position that permits fluid flow along the fluid discharge path;
- c. a upstream diaphragm defining an interior volume isolated from the pressure condition upstream of the valve element and engaged with the valve element to control the movement of the valve element in a manner that retains the valve element in the sealing position until a pressure differential between the interior volume of the diaphragm and the interior of the port body moves the valve element to the open position;
- and
- d. a downstream diaphragm defining an interior volume isolated from the pressure condition downstream of the valve element and engaged with the valve element to control the movement of the valve element in a manner that retains the valve element in the sealing position until a pressure differential between the interior volume of the diaphragm and the interior of the port body moves the valve element to the open position.
A cylinder and a valve assembly for containing pressurized fluid and controlling the discharge of pressurized fluid from the cylinder, the cylinder and valve assembly comprising:
- a cylinder defining a cylinder opening;
- a port body adapted for sealing engagement with the cylinder opening;
- a fluid inlet port defined by the port body and located outside the cylinder;
- a fluid discharge path defined by the valve body between the fluid inlet port and the fluid outlet port;
- a manually operated shut off valve for controlling fluid flow along the fluid discharge path;
- and
- an automatic valve containing a valve element biased into a scaling position that blocks fluid flow along the fluid discharge path and a plurality of sealed bellows, at least one located upstream and at least one located downstream of the valve element along the fluid discharge path, the sealed bellows having one portion operably linked to the valve element to move the valve element to an open position when relative pressure between the interior and exterior of the bellow expands the bellows and wherein the open position permits fluid flow along the fluid discharge path.
An apparatus for controlling the discharge of pressurized fluids from the outlet of a pressurized tank containing toxic hydridic or halidic compounds, the apparatus comprising
- a container for holding a pressurized fluid in an at least partial gas phase;
- an outlet port for releasing pressurized gas from the container;
- a gas flow path defined at least in part by the outlet port for delivering pressurized gas from the container;
- and
- a plurality of separate regulating devices at least one upstream and at least one downstream of a valve in the form of a restricted flow path along at least a portion of the gas flow path that limits the flow of the gas contained in the container to between 10 to 20 sccm at atmospheric conditions.
Dependencies are inferred from the claim text.