| 摘要 |
A valve comprising two compartments separated by a flexible diaphragm, each compartment being defined by an arcuate wall having an optionally interchangeable inlet and outlet located therein to allow the flow of liquid into and through the compartment, the flexible diaphragm being mounted between the arcuate walls and being adapted to be distended into one of the compartments to reduce or restrict the flow of liquid therethrough by excess pressure exerted by liquid in the other compartment; and a cooling installation containing one or more of such valves incorporated in pipelines associated with fans.
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