Trangia B25 Brass Spirit Burner

A camp-stove control that looks like a tiny brass eyelid.

The B25 has no knobs or hose. Look closely at the rim and you can see the small holes where the flame forms. Alongside it sits a ring with a sliding cover that adjusts how much of the burner is exposed.

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By Trangia
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Photo by Ashley Pomeroy · Source · CC BY-SA 4.0. Photo: Ashley Pomeroy / Wikimedia Commons (CC BY-SA 4.0). Proportionally resized and converted to WebP. Full composition retained.

WHY IT CAUGHT OUR EYE

The three pieces explain the mechanism in a single photograph. The part shaped like a lid regulates the flame, while the threaded cap belongs on the cold burner.

BEFORE YOU BUY

This component needs a compatible stove support. Follow Trangia’s fuel and outdoor-use instructions, and let the burner cool fully before refilling or fitting the screw cap.

One brass B25 burner, 602500, with screw cap and adjustable simmer ring. This is the burner component, sold separately from a cookset.