HESI Igniter

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Product: HESI Igniter

The HESI is a Class 3 Igniter used for direct spark ignition of oil or gas igniters, small burners, and combustion turbines. The Standard HESI is FM approved and the CE Version meets the Low Voltage Directive and Electromagnetic Interference Immunity Directive. An ATEX version is also available.

Forney’s High Energy Spark Igniter (HESI) provides a highly reliable, non-fouling source of ignition for oil or gas igniters or small burners.

Product Overview

The High Energy Spark Igniter (HESI) is a Class 3 Igniter used for direct spark ignition of oil or gas igniters or small burners. Forney’s HESI provides a highly reliable source of ignition for a wide range of industry igniters utilizing a 12 joule source of energy delivered to the spark tip (3 sparks per second) which easily ignites the fuel.

The High Energy Spark Igniter consists of three major components: a power unit, spark rod assembly and cable assembly.

The power unit is packaged in a NEMA-4 or 4X enclosure suitable for wall mounting at the burner front as a standard.Additional enclosures are available to meet specifi c application demands. Th e power unit develops 12 joules of energy delivered to the spark tip through the use of heavy duty electrical components. It has a 50% duty cycle at temperatures up to 135°F ambient.

The spark rod is available in the standard rigid design or in a flexible configuration for use in a tilting tangential burner application. The spark rod features a self-cleaning surface-gap spark tip that is easily replaceable via a threaded connection. Both rigid and flexible spark rods can be provided with an optional retraction assembly to allow the spark tip to be inserted and retracted from the firing position.

Th e cable assembly consists of heavy duty 12-gauge, 3,000-volt wire sheathed in a ½ inch flexible conduit terminated with quick release, militarygrade connectors.

Standard designs are available for both Class I Div 2 and Class I Div 1 area applications. The ATEX HESI is ATEX Exd IIC T6 approved.


Technical Data

Specifications

Standard HESI ATEX HESI
Igniter Class: Class 3 Specia
Approval: Factory Mutual ATEX Exd IIC T6
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)
Spark Rod Diameter: 0.625 in. (1.6 cm)
Spark Tip Type: Surface gap
Spark Tip Material: Stainless steel with a silicon carbide insulator
Maximum Tip Temperature: 1000°F (537.8° C)
Power Unit Temperature Ratings: 0°F to 135°F (-18°C to 57°C)
Power Unit Enclosure: NEMA-4 or 4X approved ATEX Exd IIC T6 approved
Power Cable Lengths: 6’, 12’, 15’ (15’ is standard)
Duty Cycle: 50% at temperature rating

Power Unit Dimensions:

Standard (NEMA-4) 10” x 8” x 4.25” (25.4 cm x 20.32 cm x 10.8 cm)
Spark Proof Indication 10” x 12” x 5” (25.4 cm x 30.48 cm x 12.7 cm)
Class I Div II 10” x 8” x 4.25” (25.4 cm x 20.3 cm x 10.8 cm)
Class I Div I 8” x 10” x 6” (20.3 cm x 25.4 cm x 15.2 cm)
ATEX 12.0” x 11.0” x 9.0” (30.48 cm x 27.94 cm x 22.86 cm)


Resources

Drawings

hesi-drawing


Solutions & Applications

Features & Benefits

  • NON-FOULING SPARK TIP
    The surface gap spark tip emits a selfcleaning, highly reliable, 12 joule spark even in the presence of moisture, oil and carbon deposits.
  • REMOVABLE SPARK TIP
    The spark tip completely detaches from the spark rod through a threaded connection. Replacement of the spark tip is quick and easy.
  • APPLICATION FLEXIBILITY
    Standard, flexible and retractable HESI models are available to fit a variety of igniter or burner types.
  • COST EFFECTIVE SOLUTION
    Proven technologies at an affordable price. Pre-packaged, pre-engineered product minimizes cost and lead time.
  • SAFE OPERATION
    Heavy duty, UL approved flexible cable connects the power unit to the spark rod assembly ensuring operator safety.

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