GENERAL CHARACTERISTICS:
The ATEX air screw threaded heaters are made for various industrial applications in the heating of gaseous fluids.
In addition, this type of heaters guarantees high performance and efficiency in maintaining temperature of gaseous fluids (air, steam, gas, etc …).
The heating elements that make up the tube bundle can take on various shapes and folds that makes them easy to install even on tanks, tanks or pipe ducts, either horizontally or vertically, for the direct or indirect heating of gaseous fluids intended for the most unlimited use in the main industrial sectors.
The use of high-quality materials within our production cycle allows the armored electric resistors on our ATEX certification plug to achieve high safety operating temperatures and a medium to long-term operating life.
USE
Designed to work even in extreme conditions in the presence of explosive atmosphere, in pipes, tanks or pressure tanks for direct or indirect heating of air and gas, this type of ATEX electric heaters guarantees optimal heat exchange, even in size very compact.
To ensure the design of an efficient ATEX electric heater, fitted with threaded connection, you must know the following technical parameters:
Among the most common applications in environments with explosive atmospheres, we find:
TYPICAL APPLICATIONS
Forced convection fluid heating (air, steam, gas, gas mixtures) in hazardous atmosphere ATEX Eexd for zone 21 and 22.
Forced convection fluid heating (biogas, methane, process gas)
Gas regeneration and cogeneration plants
Dangerous gas recovery plants
Cooling towers for use in a safe environment or in an explosive atmosphere.
ATEX process heaters for use in offshore and chemical plant platforms
Nuclear Power Plants and Nuclear Reactor Cooling Plants.
ATEX superheat heaters and steam
CERTIFIED QUALITY PRODUCT
The entire production cycle of ATEX electric resistors on plug is subjected to the most rigid dimensional and electrical tests in accordance with our ISO 9001: 2008 certified quality system and fully complies with the requirements of CEI / EN ( EN 60079-1: 2007, EN 60079-1: 2007, EN 61241-1: 2004), ATEX94 / 9 / CE and, where required, PED97 / 9 / CE.
TECHNICAL DATA
This type of heaters consists of a tube bundle consisting of one, two or three electric heating elements of various diameters, normally bent U or eyelets, perpendicular to the outlet of the electrical contacts or bent at 90 degrees. Each element is welded to TIG or silver alloy welded on Threaded Connections with thread diameter from 1 “to 2” 1/2 “NPT”, “GAS” or “WITWORTH” tapered or threaded non- unified of variable size on customer specification, depending on working pressure and working temperature.
Part of the electrical wiring is housed inside standard enclosures or headboards made of die-cast aluminum, carbon steel or stainless steel 304 and 316 with IP65 / IP66 protection rating classified as ATEX Ex-de certified explosion proof 21 and 22, by class temp. T1-T6 and use / installation in explosive atmosphere (II2D Ex tb IIIC T 65 ° C / T450 ° C Db IP65).
| Classe Temp. ATEX / ATEX Temp. Class | ||||||||||||
| ‘T6′: 85°C | ‘T5′: 100°C | ‘T4′: 135°C | ‘T3′: 200°C | ‘T2′: 300 | ‘T1′: 450°C | ||||||||||||
| Lungh. Z.N. / Cold zone Lg. | A | B | A | B | A | B | A | B | A | B | A | B |
| 300 mm | T6 | X | T4 | X | T3 | X | T3 | X | T2 | X | T2 | X |
| 250 mm | T6 | X | T4 | X | T3 | X | T3 | X | T2 | X | T2 | X |
| 200 mm | T6 | X | T4 | X | T3 | X | T3 | X | T2 | X | – | |
| 150 mm | T6 | X | T4 | X | T3 | X | – | – | – | |||
| 100 mm | T6 | X | T4 | X | T3 | X | – | – | – | |||
| 0 mm | T6 | X | – | – | – | – | – | |||||
| Temp. Lavoro / Working Temp. | 0°C | 100°C | 150°C | 200°C | 250°C | 300°C | ||||||
| Legenda:
A = Classe Temp. / Temp. Class B = Ex-proof head Temp.-proof allowance |
(X)= Yes |
(–)= Not |
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Equipped with efficient thermoregulators (thermostats with adjustable temperature range, automatic or manual reset, or alternatively, skin safety thermostats with cutout, PT100 thermocouples and / or thermocouples “J” or “K “), suitable for protecting the heater from overheating and any premature damage. On the board of the electrical wiring, according to the specific needs of the customer, the power inputs (NPT or GAS) are also sized according to the number of installed elements, the power and the hollow which determines the cable section .
The surface load (W / cm2) of these types of resistors on the ATEX anti-deflagrating head on threaded connection is appropriately determined, from time to time, depending on the conditions of use and type of fluid to be heated; In addition to these factors, the maximum working temperature and working environment are also variable which directly influences the choice of the type of sheath material with which to construct the tube bundle of these heaters (Carbon Steel, Stainless Steel AISI304, AISI309 , AISI 321, AISI 316L, Incoloy800-825, Inconel 600 or Titanium.
SOME EXAMPLES:
