GENERAL CHARACTERISTICS:
The air-cooled heating elements are manufactured with highly innovative production solutions, ranging from high-quality materials from the world’s best markets, making it possible to create a heater that meets the highest standards of reliability. They are designed for various industrial uses in the indirect heating of gaseous fluids and specific explosive atmosphere installation.
This type of heaters guarantees optimum performance and efficiency in maintaining the temperature of gaseous fluids (air, vapors, gas, etc.) whenever the specificity of the gaseous fluid itself does not allow direct heating, in the presence of explosive atmospheres, a reason for which is heated indirectly for heat exchange on the metal mass of the tubular shirt inside which the resistance is placed.
Typically, working within confined spaces within a cloak, skin resistance temperatures reach remarkable levels, so superficial power density is kept fairly small (max 1 W / cm²).
The internal heat is transmitted optimally to the wall of the shirt ensuring a homogeneous and optimal heat exchange with the external fluid to be heated.
The specific design of this type of airtight intubate resistors also allows easy extraction of the heating beam for the replacement or maintenance of the system.
Designed to work even in extreme conditions in the presence of explosive atmosphere, this type of electric heaters intubated in a mantle guarantee optimal thermal exchange, even in very compact dimensions.
CERTIFIED QUALITY PRODUCT
The use of high-quality materials within our production cycle allows the certified body-worn armored electric resistors to achieve high operating temperatures and a medium to long-term operating life.
The entire production cycle of Intubated Resistors is subjected to the most rigid dimensional and electrical tests in accordance with our ISO 9001: 2008 certified Quality Management System and in full compliance with CEI / EN standards.
TECHNICAL DATA
They can be equipped with threaded and / or flanged fastenings of any type, DIN, ANSI, or any other standard, but also custom size flanges. The flared intubated heater consists of a stainless steel shirt inside which a resistance having a heating pipe bundle consisting of one or more elements is inserted.
The same can also be built with built-in thermocouple or thermostat with overheating skin with fixed cut-out.
Furthermore, they can also be constructed with cold sections at the ends or with differentiated power sections and with 2-3 separate power circuits; this finishing is especially used in the construction of flange cartridge electrical resistances over 500 mm long, with a power density <15 W / cm².
To ensure the design of an efficient electric heater intubated, you need to know the following technical parameters:
TYPICAL APPLICATIONS:
Among the most common applications of these certified intel heaters are:
CERTIFIED QUALITY PRODUCT
The entire production cycle of Intubated Resistors is subjected to the most rigid dimensional and electrical tests in accordance with our ISO 9001: 2008 certified Quality Management System and fully complies with the requirements of current CEI / EN (EN Standards 60079-0: 2009, EN 60079-1: 2007, EN 60079-7: 2007, EN 61241-1: 2004), 94 / 9 / CE and, where required, PED97 / 9 / EC.
TECHNICAL DATA
This type of heaters consists of a tube bundle formed by one or more electric heating elements of varying diameters having electrical contact perpendicular to outlet or with 90 degree power supply, which is welded to TIG on threaded connections NPT, GAS, Gk 1 “to 2” and 1/2 “or flanges of different sizes according to UNI / DIN, ANSI, JSC standard or unaltered flanges of variable size according to customer’s specifications, depending on working pressure and working temperature .
The part of the electrical wiring is housed inside standard, watertight, die-cast, carbon steel or 304 and 316 stainless steel IP65 / IP66 protection rating, classified as certified explosion proof ex-de , zones 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. / 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 accurate thermoregulators (fixed thermostats with thermocouple and / or thermocouples “J” or “K”), suitable for protecting the heater from overheating and premature damage, have a electrical wiring heads with properly dimensioned power inputs (metric pitch ‘M’, conical ‘Gk’ or ‘NPT’) according to the customer’s specific needs, depending on the number of installed elements, as well as the power and amperage which determines the power cable section.
The surface load (W / cm2) of these types of intubated electrical resistors 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 (Stainless Steel AISI304, AISI 321, AISI 316L , Incoloy800, Inconel 600).
This special type of heaters is particularly suitable for all applications, especially on board machines or continuous cycle systems that have high plant shutdown costs.
SOME EXAMPLES:
