Air Heaters
The ISE type electric heaters comprise a range of Ex e air duct heaters, custom built to meet client specification and suitable for use in Zone 1 or Zone 2 hazardous areas.
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- A range of Ex e Gas Group IIC, increased safety certified duct air heaters
- Temperature classifications T2 to T6
- Elements are certified Ex e for use in Zone 1 hazardous areas
- Elements are individually replaceable on site without the need for special tools
- Terminal box is certified weatherproof to IP66 and IP67
- Anti-condensation heater fitted if required
- Various types of over-temperature cut-outs available, e.g. thermostats, RTD’s or thermocouples
- Air handling units
- Drying ovens
- Furnace heating
- HVAC duct heating
- Space heating
Certifications
- ATEX / IECEx EX logo II 2 G
Ex e IIC T1 to T6 Gb IP67 - CU TR (EAC), CCOE, CNEx, Inmetro
Terminal Box
- Lightweight construction, manufactured from either carbon steel (corrosion protected) or 316L stainless steel throughout
Heating Elements
- Manufactured from 80/20 NiCr resistance wire with high purity compacted magnesium oxide powder sheathed with corrosion/erosion resistant tube (eg: Incoloy 800/825, 316/316L stainless steel, Inconel 600/625, 321 stainless steel, Titanium)
Duct Construction
- Manufactured from either stainless steel or pre-galvanised sheet steel to suit the specific working environment; the element-mounted flange is designed to enable removal of the heater bundle without disturbing the remaining ductwork
Supports on the heating elements
- Elements are supported in a baffle assembly to prevent flow-induced vibration
Voltage
- Suitable for voltages up to 690V
Installation of the heating elements
- Elements are sealed into the mounting flange by either brass or stainless steel bushings to facilitate individual replacement of elements
Special Features
- Where a hazardous gas is present within the duct, the elements are supplied certified Ex e for use in an ATEX / IECEx Zone 1 Area
Temperature Monitoring
Generally over temperature protective devices are installed as follows:
Where elements are NOT in a hazardous area:
- 1 thermostat per heating stage, sensing element surface temperature
- 1 thermostat sensing air temperature
Where elements ARE in a Hazardous Area:
- 3 thermal cut-outs (1 per phase), per heating stage sensing element surface temperature
- 1 thermal cut-out sensing air temperature
Note: The air temperature sensor is not required if the terminal box is thermally spaced from the duct