China Atex Cable Gland Installation Supplier & Factory

Ex d (Flameproof) cable glands are built with heavy-duty metallic walls and calibrated flamepaths to withstand internal gas explosion pressures and cool escaping gases below ignition temperatures. Ex e (Increased Safety) glands do not require internal explosion containment; instead, they provide exceptional physical robustness, zero-arcing clearances, and superior environmental sealing (IP66/IP68) to prevent electrical arcing, dust ingress, and moisture accumulation. HOONSUN manufactures dual-certified Ex d / Ex e cable glands that fulfill both protection concepts concurrently.

Thread geometry is manufactured to stringent 6g tolerances for external Metric threads (ISO 965-1/965-3) and Class 2 standard tolerances for NPT threads (ANSI/ASME B1.20.1). Every machining run is monitored via calibrated Go/No-Go thread plug and ring gauges and high-resolution optical profile projectors. This guarantees that your site technicians can engage the mandated minimum of 5 threads without binding, cross-threading, or loose clearances that could breach flameproof integrity.

To mitigate cold flow in polymer-jacketed or LSOH cables, HOONSUN utilizes wide-contact elastomeric sealing inserts compounded from chloroprene or silicone, which exert controlled, uniform radial displacement rather than aggressive localized pinching. For critical Zone 1 installations susceptible to severe cable creep, we provide barrier-compound type cable glands where quick-setting resin seals individual conductors, eliminating cable cold-flow vulnerabilities and longitudinal gas migration.

Unplated brass exposed to salt spray, industrial sulfur dioxide, or ammonia atmospheres quickly develops copper-tarnish and surface pitting, which can degrade thread clearances and cause galvanic corrosion against aluminum or stainless steel enclosures. HOONSUN applies an electro-deposited 10–15µm nickel-plating layer across internal and external surfaces. This provides long-term oxidation protection, reduces thread friction during torquing, and preserves conductivity for earthing bonding.

Yes. Many of our core product lines are UL certified and designed for dual compatibility under the IECEx/ATEX Zone system (Zone 1, Zone 2) as well as the North American NEC 505 and NEC 500 Class I, Division 2 systems. We manufacture standard NPT threads from 1/2" up to 4" to match North American explosion-proof conduit and junction boxes, complete with factory compliance documentation for site inspectors.

Every HOONSUN cable gland package includes a specific torque chart based on entry thread size and cable clamping range. Installers should always use a calibrated torque wrench rather than open pipe wrenches. For instance, our M20 nickel-plated brass series typically requires between 20 to 30 N·m for outer compression nut tightening, ensuring that the seal achieves gas-tight IP68 sealing without over-stressing internal elastomeric molecular chains.

As an in-house manufacturer operating 60+ CNC machines in Liushi, we customize entry thread lengths (e.g., extending from standard 15mm to 25mm for thick cast explosion-proof enclosures), custom clamping cone angles for specialized mining cables, alternative seal formulations (Viton, EPDM), and custom laser-engraved part numbers, company logos, and certification text at low MOQs.

Every export shipment is backed by a full Quality Assurance Dossier containing EN 10204 3.1 Material Test Reports (MTRs) for raw brass or stainless steel, Certificate of Conformity (CoC), IP68 water immersion test reports, ATEX/CE/UL certificate photocopies, and detailed dimensional inspection records. This documentation ensures rapid site approvals during third-party client audits.