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.
FEATURES AND BENEFITS
- Certified to ATEX or IECEx standards
- 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
APPLICATIONS
- Air handling units
- Drying ovens
- Furnace heating
- HVAC duct heating
- Space heating
SPECIFICATIONS
Certifications
- ATEX / IECEx EX logo II 2 G
Ex e IIC T1 to T6 Gb IP67 - CU TR (EAC), CCOE, CNEx, Inmetro
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)
Supports on the heating elements
Elements are supported in a baffle assembly to prevent flow-induced vibration
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
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
Terminal Box
- Lightweight construction, manufactured from either carbon steel (corrosion protected) or 316L stainless steel throughout
Testing
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
- Elektrisch
- Heißwasser aus Ringleitung
- Dampf
- Öl-Ringleitung
- Kombinationsbeheizung aus Strom, Wasser, Dampf und / oder Öl
Voltage
- Suitable for voltages up to 690V
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