Maxon 27731 Flame Rod Assembly

The Maxon 27731 20" Flame Rod Assembly is a critical industrial combustion component designed for high-precision flame detection and rectification. Engineered to survive the rigorous thermal environments of industrial process heating, this assembly typically supports the Maxon Ovenpak 400 series, including models 425, 432M, 435, and 442M. With its 20-inch overall length, this flame rod provides the reach necessary for deep-seated burner configurations, ensuring the combustion controller receives a consistent flame rectification signal to prevent nuisance shutdowns and maintain safety protocols.

Constructed with a high-grade ceramic insulator and a durable alloy electrode, the Maxon 27731 is built for longevity in continuous-duty applications. The assembly includes a hex bushing (part number 26663) and a protective rubber boot (part number 18722) to shield the electrical connection from moisture and debris. Service technicians can field-trim the electrode to match specific flame envelopes, optimizing microamp readings for better system reliability. This genuine Maxon replacement part is essential for contractors maintaining Ovenpak EB or MA/MRV burners where reliable flame proving is non-negotiable.

• Optimized Compatibility: Direct fit for Maxon Ovenpak 400 series and EB-4/5 burner systems.
• Enhanced Durability: High-temperature ceramic prevents electrical leakage and signal interference.
• Field Serviceable: 20-inch rod can be trimmed to length to suit specific burner flame patterns.
• Complete Assembly: Includes the essential mounting bushing and rubber connector boot for a secure installation.
• Reliable Safety: Ensures accurate flame sensing to avoid dangerous gas accumulation during ignition failure.

Which burner models use the Maxon 27731?
This rod is designed for the Maxon Ovenpak 400 series, including the 425, 432M, 435, 442M, and the EB-4/5 and EB-6/7 models.

What should I do if my system is losing its flame signal?
First, inspect the flame rod for carbon buildup or oxidation. If the microamp signal remains low after cleaning, check the flame rectification circuit ground or replace the 27731 assembly if the ceramic is cracked.

Can I cut this rod to a shorter length?
Yes, the 20-inch electrode is designed for field adjustment. Technicians can trim the rod to the specific depth required to reach the flame’s ionization zone.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.