Fail-safe delivery arrangement for pressurized containers

Details Fail-safe delivery arrangement for pressurized containers Fail-safe delivery arrangement for pressurized containers

1998-04-17

2000-04-04

Lee, Kevin

Valves and valve actuation

With material guide or restrictor

2513353, 138 44, F16K 31365

Patent

active

060451157

ABSTRACT:
The present invention uses a flow restrictor to provide a capillary size opening that minimizes any discharge of toxic gases from compressed gas cylinders in the unlikely event of the control valve or regulator failure. The use of this arrangement to provide a flow restriction in combination with a regulator in the form of a dispensing check valve provides a virtually fail safe system for preventing hazardous discharge of fluid from a pressurized cylinder or tank. A capillary tube or other structure can provide capillary size openings that minimizes any discharge of gas in the unlikely event of a failure of the regulator. Location of the inlet to the capillary tube at the midpoint of the cylinder can also prevent the discharge of liquid from the cylinder if the control valve system fails. Limiting the accidental discharge of fluid from the cylinder to gas phase fluids greatly reduces the uncontrolled mass flow rate at which fluid can escape from the cylinder. A diaphragm controls the movement of a check valve element to prevent discharge of gas from a tank unless a predetermined vacuum condition exists downstream of the check valve. This system is particularly useful in the delivery of arsine gas and provides multiple safeguards against accidental discharge.

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patent: 5820102 (1998-10-01), Borland
patent: 5937895 (1999-08-01), Le Febre et al.

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