Expansion valve block with co-ordinated high-and low-pressure circuit control means

摘要

The invention relates to an expansion valve block which is equipped with coordinated means ( 8 ) for isolating the high-pressure circuit ( 3 ) and the low-pressure circuit ( 4 ) such that, when the gas delivery inlet is opened and closed, the two circuits are automatically controlled using the sequence that best guarantees the immunity of the installation.