Case Study · Metal Coating
Linear Burner for a Powder-Coating Curing Oven
A long tunnel oven needed even banded heat along its length. A SHOEI DCM30 linear modulating burner, linked to the oven controller, held cure temperature at ±1–2℃ and cut gas use 11–14%.
The challenge
The old split burner gave uneven oven temperature — local overheating and under-cure, lowering yield.
Only two-stage control; temperature swung ±8–12℃, unsuitable for powder curing.
Low-load combustion was unstable with flameout and local yellow flame.
An environmental upgrade required NOx control and lower gas use.
The narrow tunnel oven needed uniform banded hot-air heat along its length.
What we supplied & did
Fitted a SHOEI DCM30 linear duct burner for the tunnel oven; linear flame releases heat evenly along the oven length.
Used PID continuous modulation, 20:1 turndown, linked to the oven temperature controller to auto-match line speed.
Added a Dungs gas safety valve train, pressure monitoring and UV flame detection with flameout/low-pressure/high-pressure interlock cutoff.
Tuned the air/fuel curve on site and optimized hot-air circulation for the duct structure to suppress local hot spots.
Integrated the system with the customer's existing PLC for fully automatic operation.
Measured results
What changed on the line
Oven temperature uniformity improved sharply; cure temperature holds at ±1–2℃, raising powder-cure consistency and lowering defect rate.
High and low load both burn stable — no yellow flame or flameout, reliable across 24-hour continuous lines.
NOx meets the local limit and passed environmental assessment.
Modulating optimization saved about 11–14% gas versus the old burner.
The plug-in burner structure makes maintenance quick and cuts downtime.
Equipment used in this project
Each category page covers what the part does, how it fails and what to check before ordering.
Gas Burners
Linear modulating firing for tunnel ovens.
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Gas Pressure Regulator
Stable gas pressure into the safety train.
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Flame Detector
UV flame supervision in high-temperature duty.
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Universal Controller
Coordinates oven zones and burner control.
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Send the load, the fuel and the process profile — we come back with matching burner, controls and a safety train, and a quotation.
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