US 7,591,276 B2
	Expansion valve block with coordinated high- and low-pressure circuit control means
Gilles Cannet, Parmain (France); and Clarisse L'Heveder, Shangai (China)
Assigned to L'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude, Paris (France)
Appl. No. 10/560,195 PCT Filed Jun. 18, 2004, PCT No. PCT/FR2004/001526 § 371(c)(1), (2), (4) Date Dec. 08, 2005, PCT Pub. No. WO2005/001590, PCT Pub. Date Jan. 06, 2005.
Claims priority of application No. 03 07672 (FR), filed on Jun. 25, 2003.
Prior Publication US 2006/0137748 A1, Jun. 29, 2006
Int. Cl. G05D 16/06 (2006.01)

U.S. Cl. 137—1  [137/613; 137/505.25]

29 Claims

26. A method for delivering a fluid in an expansion valve block, said expansion valve block comprising an upstream circuit, and a downstream circuit in which the pressure is below the pressure in the upstream circuit, a first control means for opening said downstream circuit, a second control means for opening said upstream circuit and a means for commanding the circulation of the fluid, wherein when an operator initiates the means for commanding the circulation of the fluid, the opening of the upstream circuit by the second control means occurs before the opening of the downstream circuit by the first control means.