Overview of Direct Fired Air Heaters

FOR IMMEDIATE RELEASE
Cincinnati, Ohio, United States of America (Free-Press-Release.com) December 22, 2011 --

While sensitive processes may warrant indirect fired air heaters, direct fired air heaters are essential to industries such as clay/sand, ceramics, coating, printing, composite curing, fertilizer production, and many others where the products of combustion will not contaminate the end product. There are primarily 3 types of direct fired air heaters used in industrial processes today: Duct Air Heaters, Packaged Air Heaters and Gun Style Air Heaters. Stelter & Brinck is one manufacturer that provides each of these three types of heaters; below is a summary of S&B’s direct fired heaters.
Duct Air Heaters
Duct air heaters are primarily available in two distinctive configurations: fresh air duct heaters and recirculating duct air heaters. The fresh air model uses the oxygen present in the process stream and the recirculating model is used in processes with low oxygen levels. These heaters are called duct heaters because they are designed to fit into the process ductwork. Duct air heaters are for applications which generally require 1000o F or less outlet temperatures, including heat treating, baking, drying, curing and many more.
Packaged Air Heaters

Packaged air heaters are complete with all the necessary combustion equipment parts, controls, and wires essential for the application. Packaged air heaters arrive on location ready for utility connection and start-up. These heaters are available in the 4 configurations listed below.
1. Natural Gas, Butane or Propane Fired
2. Heat with Steam
3. Heat or Cool with Liquids
4. Dehumidify and reheat air
A few of the industries that use packaged heaters are: chemical, dyes, paints and molds processing.
Gun Style Air Heaters

Gun style air heaters are used in processes in which oxygen content is low or the air stream is dirty. As the name suggests, these types of air heaters look like a barrel, built around the traditional heating components. These units are most commonly used in glass and metal curing, melting, smoldering, annealing and other applications that require higher process air temperatures, fuel oil operation, and/or mass flows than the other two styles of direct fired air heaters.

Air     combustion systems     direct fired air heaters     duct style     gun style air heater     packaged air heater     process heat equipment     stelter brinck