When do you use barrier glands

They shall be circular and compact. Any bedding or sheath shall be extruded. Fillers, if any, shall be non-hygroscopic; If cables do not pass one of these criterias and such cables link between a hazardous and non-hazardous area the result may be flammable gas, liquid or vapour migration through the interstices of unfilled cables to the inside of; for example, control room equipment. The situation is likely to be most acute with equipment installed in Zone 0 or Zone 1 locations where the presence of a hazardous atmosphere has a greater likelihood and duration.

If these conditions are likely to occur a barrier gland should be used. Cable glands sealed with setting compound barrier cable glands in compliance with IEC and certified as equipment;. The sealing device shall be fitted at the point of entry of cables to the equipment. NOTE 1 The minimum length of cable is to minimize the potential for flame transmission through the cable see also Annex E ;. NOTE 2 If the cable gland and actual cable are certified as a part of the equipment enclosures then compliance to Source: IEC Ed.

The key points here to note is that under the latest standard, the use of barrier glands vs. The new standard does away with this and states that if the cable is 3 meters or longer, the use of a non-barrier Ex d gland is now acceptable, regardless of area classification and gas. The new standard again, now requires a barrier gland for this application where the cable is less than 3. Figures 2 and 3 show cables that should not be used with glands with elastomeric sealing rings.

Knowledge of this Standard is imperative when selecting cables and cable glands for use in hazardous areas and merely referring to the product certification is not enough. IEC Section 9. States that: Cables for fixed installations — shall be: a sheathed with thermoplastic, thermosetting, or elastomeric material. They shall be circular and compact.

Any bedding or sheath shall be extruded. Fillers, if any, shall be non-hygroscopic; If cables do not pass one of these criterias and such cables link between a hazardous and non-hazardous area the result may be flammable gas, liquid or vapour migration through the interstices of unfilled cables to the inside of; for example, control room equipment.

The situation is likely to be most acute with equipment installed in Zone 0 or Zone 1 locations where the presence of a hazardous atmosphere has a greater likelihood and duration. If these conditions are likely to occur a barrier gland should be used. The backnut, once tightened to the line corresponding to the cable diameter, ensures there is no cable damage whilst still maintaining IP and pull-out.

View Details. Resource Quick View. Our Barrier Glands For explosive atmospheres A barrier gland is a cable gland that provides a seal around the individual cores of a cable to maintain the flameproof integrity of Exd equipment.

ExPress Barrier Resin A liquid injectable and fast curing resin, allowing for faster installation time than traditional 2-part compounds. This gland features Hawke's unique reversible Armour clamp for all types of Armour and braid. Barrier Glands Special Features. Hawke 3. Show More Show Less. Certified Listed. ATEX 2. CNEX 1. CNEx 1. CSA 2. EAC 2.