‘RFA’ Rod-Type Immersion Heaters
The EXHEAT RFA range of Flameproof rod-type immersion heaters is suitable for installation in process tanks, safety showers, engine sumps, pressure vessels and similar plants located in Zone 1 and Zone 2 Hazardous Areas, where the flammable atmosphere is a IIA, IIB or IIC Gas Group. They are suitable for heating all process liquids or gases which are non-corrosive to the materials of construction.
Register Interest:
Features
Certified to meet the ATEX Directive 94/9/EC and GOST-R
Lightweight cast aluminium alloy terminal enclosure with weatherproof protection to IP67
Choice of built in process temperature sensors
Suitable for ambient temperatures from -40°C to +40°C
Mounting of the heater can be by a threaded boss or an industry standard flange
Designed for horizontal installation, vertical mounting available on request
Typical Applications
Pre-heating oil/water
Processing equipment
Cleaning and rinsing ranks
Heat transfer systems
Boiler equipment
Frost protection
Specification
Certification
ATEX certified 
II 2 G
Ex’d’ IIC T3 to T6
EN60079-0 & EN60079-1
GOST-R Certified
II 2 GEx’d’ IIC T3 to T6
EN60079-0 & EN60079-1
GOST-R Certified
Enclosure
Cast aluminium alloy with a maximum of two cable entries, external and internal earths and screwed terminal cover
Certified Ex’d’ IIC T4-T6 with the option of T3-T6 where the terminal enclosure is stood away from the processing equipment
Certified Ex’d’ IIC T4-T6 with the option of T3-T6 where the terminal enclosure is stood away from the processing equipment
Elements
A maximum of three rod-type elements comprising 80/20 nickel chrome resistance wire, compacted in high purity magnesium oxide insulating powder and encased in either Incoloy, stainless steel or titanium sheath, secured by either brazing or welding depending upon the process application
Mounting
Any threaded boss or flange in any material can be specified within the limits of the design parameters
Heaters can be either ’direct-on’ or ’standoff’ as required by the ’T’ classification
Heaters can be either ’direct-on’ or ’standoff’ as required by the ’T’ classification
Controls
Heater over-temperature protection is fitted as standard
Rating
Up to 18kW
Voltage
Any electrical supply up to 690V
Contact Sales Engineer
Standard Products Sales Lines:
+44 (0)1953 886 210 - UK
+65 6496 4629 - ASIA