B PERFORMING OPERATIONS; TRANSPORTING
B01 PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01L CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
2400/00 Moving or stopping fluids
B01L2400/06 Valves, specific forms thereof
B01L2400/0677 phase change valves; Meltable, freezing, dissolvable plugs; Destructible barriers