Flame Spreader vs Burner Cap: When to Replace Each Part

Flame spreaders and burner caps work together on every gas burner, but they wear differently and fail for different reasons. Knowing which one to replace — and when — helps repair shops quote accurately and distributors stock intelligently. Here is the clear breakdown.

The Two Jobs

The burner cap is the visible top piece that sits over the flame. It shields the burner and shapes the flame crown, and it bears the brunt of heat and spills. The flame spreader sits below the cap and distributes the gas-air mixture through a ring of ports, ensuring an even, efficient flame.

How the Cap Wears

Burner caps discolor from heat, chip from dropped cookware, and erode from repeated cleaning. A warped or cracked cap causes uneven flames and poor heat transfer. Because the cap is the cosmetic face of the burner, customers notice cap wear quickly — driving steady replacement demand.

How the Spreader Wears

Flame spreaders are exposed to the hottest, most corrosive conditions, so their ports clog with carbon and their surface corrodes over time. A clogged or corroded spreader produces yellow, lazy flames and wasted gas. It is often the real culprit when a burner "just is not heating right."

When to Replace Each

• Replace the cap when it is cracked, warped, deeply pitted, or no longer sits level.
• Replace the spreader when ports are blocked beyond cleaning or the surface is corroded through.
• Often both are replaced together as a matched set for consistent performance.

Stock Both, Sell the Set

THREEMI manufactures SABAF-compatible burner caps and flame spreaders in sizes #130/#100/#75/#55, plus matched burner sets. Factory-direct wholesale pricing and flexible carton MOQ let you stock the full system and upsell the complete replacement.

About THREEMI

THREEMI is the export brand of Shenzhen Sanmi Manufacturing Co., Ltd., a professional gas stove and kitchen appliance factory in Guangdong, China. With 400+ employees, a 20,000㎡ production facility, and an annual output of 3 million units, we serve wholesalers, distributors, brand owners, and e-commerce sellers in over 30 countries. Our factory is certified ISO9001, CCC, CE, UL, GS, ETL, NF, and SASO.

Welcome Wholesale Gas Stove Parts Orders

We supply the complete gas stove parts range — SABAF-compatible burner caps, nozzles (0.45mm–1.35mm), flame spreaders, burner sets, ignition parts, thermocouples, and valve bodies — factory-direct at wholesale prices with flexible carton MOQ.

WhatsApp: +86 186 7003 0673
Email: logan@threemi.com
Website: www.threemi.com