Field glossary

Flash gas

Liquid that boils to vapor in the liquid line when pressure drops below its saturation point, starving the metering device

Used across 3 Anvilfield field guides, most in HVAC.

Also defined as

Vapor formed when liquid drops in pressure or picks up heat before the device, which starves the device of liquid
Vapor flashing in the liquid line, seen as bubbles in the sight glass

Where this shows up