Explosion Proof Immersion Heaters type D-8640/D-8660/D-8680 with retractable ceramic heating element
For hazardous areas, Sinus Jevi has developed explosionproof Ex ’de’ heating equipment, designed and manufactured in accordance with EN-IEC 60079-0, EN-IEC 60079-1, EN 60079-7 and EN-IEC 60079-31 certified by the independent testing institute ISSeP. The certificates cover zone 1 and zone 2 for hazardous areas.
Gas groups II A, II B and II C and temperature classes T6-T1. Dust group Ex tb zone 21.
The flame-proof (d) enclosures have been designed for non save areas to protect the environment against gas-explosions, caused by sparking by electrical connections of the heating elements and control devices. Several types of enclosures for immersion heaters, flanged or screwed, have been described on the next pages.
Each type covers a range of a maximum number of installed hairpin shaped heating elements and giving a range of installed capacities.
The screwed types for dimensions up to 3”.
The terminal enclosures have a IP66 degree of protection.
Standard the enclosure is coated with two layers, a zinc silicate primer and a top coating. Other coatingsystems on request.
All heaters are standard internal wired on terminals.
The maximum temperature for the terminal enclosure during operation is 80°C (based on maximum 50°C ambient temperature).
If cable entry exceeds 70°C, high temperature cables must be used. The required minimum distance between enclosure and connection flange, to ensure the temperature limit of 80°C in the enclosure, is listed in the following table as a function of temperature classes.
Maximum number of cable entries: 2 pcs M25/M20
Marking ATEX Ex II 2 G D
Ex d IIC T6-T1 Gb EN/IEC 60079-1
Ex tb IIIC T110°C Db EN/IEC 60079-31
|Temperature class||Distance enclosure to heater|