Fluid handling – With heating or cooling of the system – With electric heating element
Patent
1995-01-09
1997-12-09
Nguyen, Hoang
Fluid handling
With heating or cooling of the system
With electric heating element
1374875, 251368, F16K 4900, F16K 3112
Patent
active
056949731
ABSTRACT:
A variable restrictor. The variable restrictor is comprised of a housing having a high pressure inlet. The housing also has a channel connected to the high pressure inlet. The housing also has a low pressure outlet connected to the channel with the channel disposed between the high pressure inlet and the low pressure outlet. The variable restrictor is also comprised of a mechanism for reducing supercritical fluid at a pressure between 100-12,000 psi from the high pressure inlet to a pressure between 0-800 psi from the low pressure outlet. The reducing mechanism is disposed in the housing and is in contact with the low pressure outlet. Additionally, the variable restrictor is comprised of a pressure transducer disposed in the housing and in contact with the channel to sense the pressure in the channel. A method for restricting fluid comprising the steps of introducing high pressure fluid at a pressure between 100-12,000 psi into a high pressure port of a housing. Next, there is the step of reducing the pressure of the fluid in the high pressure port to a pressure between 0-800 psi as it flows through a channel connected to the high pressure port with a needle of a needle assembly. Then there is the step of sensing the pressure of the fluid with a pressure transducer connected directly to the channel after the pressure of the fluid has been reduced. Next there is the step of moving the needle of the needle assembly to reduce the pressure of the fluid a desired amount based on the pressure sensed in the channel. Then there is the step of flowing the fluid after its pressure has been reduced through a seat channel of a seat made of sapphire. Then there is the step of releasing the fluid through a low pressure outlet port of the housing.
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Nguyen Hoang
Schwartz Ansel M.
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