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Explosion-proof cable glands KNV (FEC) for non-armored cable

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PURPOSE AND SCOPE OF APPLICATION

KNV explosion-proof cable glands for non-armored cable are used to secure the cable against accidental pulling out, used in places where explosion-proof cable glands with IP 66/67/68 are required. According to the rules, KNV cable glands may be used for direct insertion as a part of fireproof enclosures of IIA, IIB+H2, IIC subgroups, which have the volume exceeding 2000 cm3. It helps to refuse from cable glands with partition for encapsulation.

The most important development is the use of one sealing ring for the whole range of diameters of crimped cable, which reliably crimps the incoming cable and ensures Exd type of protection. One sealing ring together with mandrel or cable withstand the force in newtons, which is equal to the twentyfold diameter value (in mm) of the mandrel or the cable. This helps to use KNV series explosion-proof cable glands without additional unloading of cable.

Increased wall thickness of the enclosures of GORELTEX cable glands considerably enhances their strength campared with cable glands of other manufacturers.

KNV explosion-proof cable glands may be used for cables with operating voltage over 3.3 kV.

KNV explosion-proof cable glands are suitable for use with the equipment having ExnR marking.

KNV cable glands may be used for armored/braided cables. Sealing and earthing of braid is performed outside the cable gland. Internal cable sheath is to be inserted into cable gland. A32 earthing element is used to ensure earthing circuit continuity with metal enclosure and protection against electromagnetic disturbances.

Thanks to their design, KNV explosion-proof cable glands ensure cable unloading, protection against pulling out without causing damage to the structure of cable sheath  and conductors, as well as prevent cable overcompression.

Explosion-proof cable glands of KNV series are designed in Russia (Patent No. 155936, rightholder "ZAVOD GORELTEX" Co. Ltd. (former "CORTEM-GORELTEX" Co. Ltd.), operating characteristics of which significantly surpass Russian and foreign analogues.

Scope of application – underground mines and pits hazardous with gas (methane), coal dust; outdoor and indoor hazardous areas as per explosion protection marking, GOST 30852.13-2002 (IEC 60079-14:1996), dangerous production facilities of I, II, III, IV hazard class supervised by Rostechnadzor of the RF and national technical supervision bodies of the Customs Union and CIS countries.