DURAFire® Oil Igniter

The DURAFire® air atomized No. 2 oil igniter features the only “protected primary combustion zone” design on the market. As a result this igniter is self-stabilized, highly reliable and requires virtually no maintenance. Atomization takes place at the rear of the igniter away from the heat of the tip resulting in no fouling or need for cleaning. Most applications require no igniter retraction reducing installation costs and ongoing maintenance.

DURAFire® can be used as a Class 1, Class 2, or Class 3 igniter, depending on the burner capacity. The DURAFire® is easily installed as a retrofit into most burner types based on its size, capacity, and reliable operation.

The DURAFire® oil igniter consists of five major components: a guide tube, an atomizer/head assembly, an oil/air mixture transport tube, a spark rod, and a stainless steel diffuser for pilot stabilization. The guide tube houses the internals, which are attached to the head and easily removed from the guide tube for maintenance purposes by releasing a “V” band retainer, requiring no tools. Cooling/combustion airflow is directed down the guide tube to support and maintain the primary combustion zone during operation. This controlled mixture of fuel and air in the primary combustion zone results in a highly reliable, stable igniter flame. While out of service, airflow cools the igniter and prevents debris from entering the end of the guide tube.

The DURAFire® oil igniter comes standard with Forney’s High Energy Spark Igniter (HESI) as the spark source. The HESI produces a powerful 12-joule spark approximately three times per second at the primary combustion zone. The HESI spark tip is a nonfouling, surface-gap tip which is replaceable as a unit by a threaded connection. The remaining HESI components consist of a positioning rod, cable and power unit. Optional equipment for the DURAFire® includes mounting hardware, retraction assembly, hoses and flame detector.



Fuel: No. 2 oil
BTU Rating: 6-30 MBtu/hr
Atomization Media: Air
Fuel Pressure: 60 psig (at igniter)
Atomizing Air Pressure: 80 psig (at igniter)
Cooling / Combustion Air: Flow: 60 SCFM (at igniter)
Pressure Drop: Approximately 3 in. WC across device
Available in 2 inch increments from 24 to 180 inches (609 to 4572 mm)
Outside Diameter: 4” (igniter can be installed in an existing mount tube for a 4” diameter device)
Material of Construction: Guide Tube and Mount Tube – Carbon Steel
Furnace End of Guide Tube – 304 Stainless Steel
Oil Tip Assembly – 304 Stainless Steel
Retraction Assembly Per Customer Requirements
Oil Tip Assembly Narrow or Wide angle, as required


HESI Specifications

Input Voltage: 120 to 240 VAC, 50/60 Hz
Input Power: 120 VAC @ 1.5 A (2-A fuse); 240 VAC @ 0.75A (1-A fuse)
Output Voltage: 2000 VDC
Output Energy: 12 joules per spark
Spark Rate: 3 per second (approximately)
Duty Cycle: 50% at temp 0°F to 135°F (-18°C to 57°C) Ambient