Duct burner HEM

chambergasdirect fired

The Selas HEM series of indirect-fired process air heaters have robust construction making them an ideal heat source for many industrial oven and process heating applications including spray booths and drying rooms. The outer casing of the HEM air heater is manufactured from standard carbon steel and is double skinned, and thermally insulated. Insulation is available either 50mm or 100mm thickness depending on application requirements. The complete inner assembly can be withdrawn on its front plate for repair or servicing and the tube banks are fitted with an end inspection cover to facilitate cleaning. Operating Air Temperatures up to 300C Heater capacities of thermal outputs from 60kW to 1000kw are available; special units to meet the requirements of a particular application can be supplied. The standard HEM heaters consist of a heat exchanger mounted inside a flanged and insulated steel duct section. The heat exchanger section is generously rated for heat transfer surface area and consists of a stainless steel combustion chamber and tube assembly. The combustion chamber and the tube bank assembly are independently mounted to cater for differential expansion. Burner Assemblies Each HEM unit is supplied with a pre-packaged and pre-wired burner assembly which includes all of the necessary burner fuel safety valves, pressure switches and automatic ignition and flame safety equipment. Most types of flame failure and automatic ignition control units can be supplied, utilizing flame rectification, photo cell or ultra-violet flame sensing equipment. Air heating burners built to specific applications and country of installation can be fitted.