Flexible Single Tube (FST) Igniter0 pages

Flexible Single Tube (FST) Igniter
A UTC Fire & Security Company
Forney’s Flexible Single Tube (FST)
Igniter provides multi-fuel, stable and
reliable ignition for tangential burners
utilizing a flexible design for optimal
ignition with tilting nozzles.
Features & Benefits
Product Overview
• Class 1 Igniter
Capacities up to 37 MBTU/hr which will
support ignition under all credible burner
light-off or operating conditions.
• One FST Igniter S upports Two Fuel
Nozzles
This arrangement results in half the
number of igniters normally required.
• F lame S tability
T
he stainless steel 7 1/2” air swirler creates
a low pressure zone at the tip for stable
flame operation.
• L ow Opacity
The turbulent mixing of the fuel and
combustion air caused by the swirler
ensures low opacity during cold light-off.
• Easy Retrofit
Can be installed between most fuel
elevations with minimal or no burner
modification.
FILE NAME: FST Igniter drawing.eps on
Pache / Forney 1 / Bob Abbot Drawing
Line Item #
9 from Req. #42871 and
Publication Number: 37686501
The Flexible Single Tube (FST) Igniter is a reliable source of ignition
energy for use in a tilting tangential type boiler. It is a Class 1, continuous duty,
igniter capable of burner ignition and low load support. It is easily installed in
the auxiliary air nozzles between the main fuel elevations and is designed with
flexible components to accommodate the tilting of the fuel nozzles. The FST
Igniter is capable of burning liquid or gaseous fuels. With capacities up to 10%
of boiler heat input, the FST improves boiler / turbine startup flexibility.
Each FST Igniter includes a flexible fuel gun, a flexible retractable High
Energy Spark Igniter (HESI) and a flame detector with a flexible fiber optic
assembly. The fuel gun has an air swirler at the furnace end which mixes the
windbox air and fuel at the tip to create a stable flame. All major components
are fixed to a burner front plate that is designed to match the existing bolt
pattern at the burner front. All components are designed to freely tilt with the
fuel nozzle through a ±30° angle. Flame detection is accomplished by the use of
either an ultraviolet or infrared detector, depending on the fuel fired.
Optional equipment includes gun retraction, quick disconnect fuel and
atomizing air couplings, as well as an electrical junction box.
• Reliable Ignition
The High Energy Spark Igniter (HESI)
automatically inserts to the most efficient
light-off position for repeatable ignition.
Forney Corporation • 3405 Wiley Post Road • Carrollton, TX 75006 • 800-356-7740 • Fax 972-458-6650 • www.forneycorp.com