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Explosion-proof boxes for connection of heating accessories under heat insulation GTG-VK2 (SA-A2CORD)

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PURPOSE AND SCOPE OF APPLICATION

GTG-VK2 is an effective solution from GORELTEX for connection and input of cables of electric heating systems under hear insulation which simplifies installation and excludes damage to heating cable during its input under heat insulation, as well as it splices ends of the heating cable for T-shaped branches. GTG-VK2 are applied for all types of GTG heating accessories and cables of third party manufacturers.

Design of OKT-2 supporting brackets enables convenient mounting on the pipe with round cross-section. The box shall be fastened to the pipe with a metal fastening clamp which is included in the set. The clamp ensures reliability of the grounding circuit between the pipe and the enclosure;

Explosion-proof boxes GTG-VK2 enable the connection of up to 3 heating cables, cables of temperature sensor. Type of sealant shall be approved when ordering.

Several OKT-2 supporting brackets can be installed on the enclosure upon customer’s request for the connection of more than 3 heating elements; arrangement of terminal blocks inside the box can be amended. The boxes are manufactured with various height H of the supporting bracket OKT-2 lower than the insulation thickness which ensures sealing of heat insulation and excludes risk of damage to cable at termination points. Mechanical strength of GTG-VK2 considerably outperforms standard direct entry sealed termination units DESTU made of polyester which allows its operation up to -75°С (high quality units DESTU up to -40°С, low cost units only -20°С). Installation of flat heating cables of 17 mm width is possible.

Scope of application – outdoor and indoor hazardous areas as per explosion protection marking, GOST 30852.13-2002 (IEC 60079-14:1996), for use in presence of combustible dust, as per GOST IEC 61241-3-2011, dangerous production facilities of I, II, III, IV hazard class supervised by Rostechnadzor and national technical supervision bodies of the Customs Union and CIS countries.

Mechanical strength and resistance to impact loads of supporting brackets ОКТ-2 considerably outperform the analogues made of polyester many of which break down at the temperature of -20°С even in case of small loads.