Weil-mclain wm560528979 - Main Burner Orifice, Natural Gas, 3.95mm, LGB Series Boilers
Weil-mclain wm560528979 - Main Burner Orifice, Natural Gas, 3.95mm, LGB Series Boilers
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This main burner orifice ensures consistent fuel delivery for Weil-McLain LGB series boilers, enabling precise natural gas metering for stable combustion. The WM560528979 is a factory-spec replacement designed to maintain original heating output and system efficiency in residential and commercial boiler assemblies.
The orifice works by metering natural gas at a specific rate through its 3.95 mm aperture. By maintaining the correct pressure drop and flow characteristic, it prevents uneven flame patterns and combustion instability caused by worn or corroded components.
Key System Performance Baselines:
- Precise Fuel Metering: Calibrated to 3.95 mm to ensure optimal gas-to-air ratios.
- Factory-Spec Compatibility: Engineered specifically for Weil-McLain LGB series cast iron boilers.
- Combustion Stability: Restores even flame geometry and improves thermal transfer efficiency.
⚠️ Application Profile: Recommended for professional HVAC maintenance on Weil-McLain LGB series sectional boilers requiring natural gas combustion calibration.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | WM560528979 |
| Model Designation | LGB Series |
| Orifice Diameter | 3.95 mm |
| Fuel Type | Natural Gas |
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