How do thermal expansion valves work?

1 Answer

Steam traps used in power stations are thermal expansion type vale
Here there is an element which is sensitive to temperature more temperature the element expands...


We want to allow condensate to pass not allow steam to pass.
Both steam and condensate enters the vale,it remain open.When condensate is finished only steam comes temperature goes up, the element expands and closes the valve.enter image source here picture credit mechnos 24 x 7