Ex d Flameproof Heaters | 250W to 6200W Convection Heaters | Chromalox RIA2

Product Overview

Ex d Flameproof Heaters

Chromalox RIA2 flameproof convection heaters provide ATEX certified heating for harsh, industrial applications for Zone 1 and Zone 2 (Gas) hazardous areas.

The Chromalox RIA2 has a painted steel terminal enclosure and steel casing which surrounds 304 grade stainless steel elements with aluminium fins.

RIA2 Ex d Flameproof Heaters are available with power outputs from 250W to 6200W (230V 1 phase and 400V 3 phase depending on temperature class and length, 320mm to 2128mm) and units are available with built in thermostats for internal adjustment (RIA2T) or external adjustment (RIA2TD) .

Chromalox RIA2 hazardous area convection heaters are certified to meet ATEX equipment directive standards, suitable for ambient temperatures from -20ºC to 40ºC (14ºF to 104ºF) and have an ingress protection rating of IP65. The RIA2 is suitable for floor mounting only.

Hazardous Area Certification

ATEX certified Ex d flameproof heaters

• Explosive Gas: ATEX II 2 G – Ex d II C T1 to T6 certified for floor mounting
• Rated for ambient operating temperatures: -20°C to 40°C (14°F to 104°F) and storage temperatures to -40°C (-40°F)
• Ingress Protection Rating: IP65

Flameproof EX D

What Does Flameproof Mean?

Principle: Flameproof is a type of protection in which the parts which could ignite an explosive atmosphere are located inside an enclosure which is able to withstand the pressure of an explosion of the explosive mixture inside. It also prevents the transmission of the explosion to the explosive atmosphere surrounding the enclosure. Technically unavoidable gaps are so long and narrow that hot gases jetting out will have lost their power to cause ignition by the time they reach the outside of the enclosure, or, alternatively, if the gaps are only required for the manufacturing process they may be sealed with an adhesive.

Important design parameters:

• Mechanical strength in accordance with a defined safety factor to withstand internal explosion pressure.
• As an orientation value, it may be assumed that inside the sphere approx. 0.8 MPa (8 bar) can be generated and that this sphere used as an Ex d enclosure must be able to withstand a pressure of 1.2 MPa (12 bar).
• Any gap between two parts of the enclosure must be kept so narrow and long that hot gas flowing out will not be able to ignite any explosive atmosphere which may be present in the potentially explosive atmosphere.
• The parameters for the gaps preventing the transmission of the ignition, width/length, are different for the explosion subgroups IIA, IIB and IIC. The most stringent requirements with regard to the gap parameters apply to enclosures in explosion subgroup IIC.

Experts in Equipment for Explosive Atmospheres

Learn more about our ATEX & IECEx Product Innovations and how we deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries – we service UK and international projects with a comprehensive range of certified Electrical, HVAC and Process Instrumentation equipment for the hazardous area industries.