Joule-Thomson cryostat in-line valve flow controller

Details Joule-Thomson cryostat in-line valve flow controller Joule-Thomson cryostat in-line valve flow controller

1997-11-21

1999-07-06

Capossela, Ronald

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

251 612, F25B 1902

Patent

active

059184710

ABSTRACT:
An in-line valve flow controller for a Joule-Thomson cryostat. The controller has an in-line valve stem that is part of, and is collinear with, an actuation stem of the cryostat. Both the in-line valve stem and actuation stem sit in an orifice of the Joule-Thomson cryostat. This arrangement automatically positions the valve stem over its valve seat. The in-line valve flow controller integrates with a temperature dependent snap disk that is used to close the valve stem against the valve seat. Initial flow rate is determined only by the diameter of the orifice of the Joule-Thomson cryostat, and not by valve position. Bypass flow is aso set by the diameter of the orifice, which is not subject wear, and the valve stem prevents contaminates from clogging the orifice.

REFERENCES:
patent: 5003783 (1991-04-01), Reale
patent: 5598711 (1997-02-01), Stubbs

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