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Direct terminal interface cable gland configurations engineered with high-grade nickel-plated brass, 304/316L stainless steel, and flame-retardant polyamide to safeguard critical infrastructure against spark propagation, gas migration, and high-pressure fluid ingress.
In modern industrial processing facilities—spanning hydrocarbon distillation columns, offshore production platforms, hydrogen refueling depots, and explosive chemical reactors—the integrity of electrical cable entries represents the final physical frontier between operational uptime and catastrophic ignition.
Explosion-proof direct cable glands, categorized under international standards such as ATEX Directive 2014/34/EU, IECEx, and NEC 500/505 Class I Division 1 & 2, are fundamentally designed to execute two non-negotiable safety tasks. First, under the Flameproof (Ex d) philosophy, the gland must withstand the internal deflagration pressure of volatile gases within an electrical enclosure, cooling hot gases across precision-machined threaded flamepaths so they cannot ignite surrounding ambient atmospheres. Second, under the Increased Safety (Ex e) concept, it guarantees an impenetrable mechanical seal preventing arcs, sparks, or thermal hotspots from ever coming into contact with hazardous gas mixtures.
Direct cable gland termination mitigates the risks associated with multi-junction enclosures by providing a direct, continuous route from external instrumentation, motors, variable-frequency drives, and control valves straight into flameproof junction boxes or control panels. This direct configuration eliminates weak points, reduces systemic footprint, and radically streamlines maintenance protocols across complex industrial plants.
Precision metric and NPT threading designed to dissipate thermal ignition energies, preventing internal explosion flashover in Class I Zone 1 environments.
Elastomeric silicone and fluoroelastomer sealing inserts tested to withstand 10 bar hydrostatic pressure, preventing water and hazardous liquid migration.
Patented cone-and-ring mechanical armor clamping mechanisms delivering robust pull-out resistance (exceeding standard IEC 62444 pull tests) alongside continuous EMC shielding.
From deep-sea production vessels to high-temperature refining units and renewable hydrogen generation, Hoonsun cable gland direct solutions are engineered to thrive where hardware failure is never an option.
Operating in aggressive saline sea mist, constant vibrational forces, and hydrocarbon atmospheres (Zone 1/21), our 316L stainless steel direct cable glands withstand continuous deluge testing (DTS01 certified). They preserve electrical continuity on marine deck machinery, winches, thruster power lines, and emergency lighting arrays.
Key Benefit: Superior resistance to chloride-induced pitting, stress corrosion cracking, and electrochemical galvanic degradation over decades of sea exposure.
Hydrogen molecules represent Gas Group IIC—the most volatile category with extremely low minimum ignition energy (MIE) and immense diffusion rates. Hoonsun metal direct type cable glands feature precision micro-tolerance machining that forms a virtually impermeable barrier against gas migration along cable strands.
Key Benefit: Zero gas creep along the internal cores of unarmored and armored cables entering Ex d analyzer shelters and compression skids.
Agricultural silos, starch facilities, and pharmaceutical granulation units produce airborne combustible particulates that pose massive explosion hazards (Ex tb/tc protection). Our nylon corrugated and metal cable glands prevent thermal insulation buildup caused by fine particulate settling.
Key Benefit: High surface temperature ratings (T6/T5) and elastomeric sealing retain their elasticity despite continuous contact with abrasive powders and organic fats.
Bogies, locomotive traction converters, and heavy earthmoving machines endure continuous high-amplitude mechanical shocks. Utilizing integrated anti-vibration locking glands prevents backing-off of locknuts and maintain uninterrupted electrical grounding.
Key Benefit: Certified dynamic vibration endurance under EN 61373 standards, guaranteeing that seal compression never relaxes during violent operational jolts.
Compare mechanical architectures, metallurgy options, and international compliance specifications across our primary direct cable gland variants.
| Series Type | Material Construction | Protection Class | Ingress Rating | Operating Temp | Applicable Cable Types |
|---|---|---|---|---|---|
| Direct Metal Series (Ex d / Ex e) | CW614N Brass / Nickel-Plated Brass | ATEX / IECEx: Ex d IIC Gb / Ex e IIC Gb | IP68 (10 bar, 30 min) | -60°C to +140°C | Non-armored, Tray Cables (TC-ER) |
| Heavy Duty Armored (BWL Series) | Nickel-Plated Brass / SS316L | Ex d IIC Gb, Ex tb IIIC Db | IP68 / NEMA 4X / NEMA 6P | -50°C to +130°C | Steel Wire Armored (SWA), Aluminum Armored (AWA) |
| Corrosive & Marine Series (SS316L) | AISI 316L / 1.4404 Stainless Steel | Ex eb IIC Gb, Ex ta IIIC Da | IP68 / IP69K (High Pressure Wash) | -60°C to +180°C | Armored, Flexible Conduit, Screened Cables |
| Polyamide Split & Corrugated | Polyamide PA66 (UL 94 V-0 flame rating) | Ex e II, Ex tb IIIC | IP68 / IP66 | -40°C to +100°C | Pre-terminated Cables, Corrugated Flexible Hoses |
| High-Temperature NGS Metal | Special Heat-Treated Brass / Silicon Seal | Ex d IIC, Zone 1 & 2 | IP68 (Hydrostatic) | -60°C to +200°C | High-temp Furnace & Smelter Power Feeds |
(Zhejiang Hoonsun Cable Gland Co., Ltd.)
Founded in 2006, Zhejiang Hongxiang Connector Co., Ltd. is rooted in Yueqing, Zhejiang — a national hub for precision electrical manufacturing in China. After nearly two decades of dedicated development, the company has evolved into a large modern industrial connectivity solutions provider integrating R&D and design, large-scale intelligent manufacturing, global sales, and one-stop services. It stands as a benchmark enterprise of considerable scale and influence in China’s cable gland and connector industry, and a key player among national high-tech enterprises.
Boasting a modern intelligent manufacturing industrial park, the company operates a standardized production workshop of over 10,000 square meters, equipped with multiple high-precision automated production lines, CNC machining centers, and a full-process quality control laboratory, establishing an industry-leading large-scale manufacturing system. With a core team of more than 300 professionals — over 30% of whom are R&D and quality management personnel — its annual production capacity exceeds 80 million units. The company is fully capable of handling large-volume orders, urgent custom projects, and long-term strategic supply partnerships for domestic and international clients, ranking among the industry’s top tier in both production capacity and delivery efficiency.
Its core product portfolio includes metal cable glands, nylon cable glands, waterproof cable glands, explosion-proof connectors, conduit fittings, and various customized connecting accessories. These products serve high-end sectors such as industrial electrical equipment, new energy equipment, rail transit, shipbuilding and heavy industry, construction machinery, military supporting facilities, and communication & industrial control. Adhering to stringent manufacturing standards and uncompromising quality requirements, the company has obtained a series of internationally recognized certifications, including ISO9001, IATF16949 automotive quality management system, CE, UL, ATEX explosion-proof certification, RoHS, and IP68 high-protection rating. Its core technologies and product performance have reached international advanced levels, with nearly 100 invention and utility model patents to its name, continuously driving technological upgrading across the industry.
Continuous innovation and quality-driven growth from precision brass cable gland manufacturing to global explosion-proof industrial leadership.
Yueqing Hoonsun Cable Gland Manufacturing Co., Ltd. mainly produces waterproof brass cable gland.
Factory relocated, new workshop area reached 2000㎡ to scale production output.
Company introduced numerical control equipment and automatic counting machines, guiding automated production technology.
The company developed a new design of cable seal, and applied for patent, patent number zl201020530888.7.
Honored to be the supplier of special waterproof cable gland for the Aircraft Carrier "Liaoning"; recognized globally.
Company focused on R&D for diverse new products: stainless steel, nylon, brass, and custom materials.
Employees expanded to 80 people, and the core of the business expanded aggressively into international markets.
Company relocated again; launched an upgraded brand identity with a brighter, modern international aesthetic.
The enterprise was upgraded and the corporate entity was officially established as Zhejiang Hoonsun Cable Gland Co., Ltd.
Factory expansion with over 120 staff and 200+ production machines, vigorously penetrating solar PV, hydrogen, and hazardous industrial sectors.
Strictly verified under international standards. Whether you are operating in heavy-duty offshore platforms or specialized hazardous zones, our comprehensive certifications ensure safety, compliance, and prolonged service longevity.
The company currently has more than 120 employees, more than 200 production equipment, and is equipped with a professional sales and management team, committed to improving production efficiency and product quality.
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Browse our comprehensive series of direct cable entry terminations, heavy armored glands, split assemblies, and high-temperature connectors designed to fulfill rigorous hazardous location demands.
Key engineering questions addressing thread engagement, sealing compounds, hazardous location classifications, and installation best practices.
Direct entry cable glands rely on an elastomeric compression seal clamped directly around the inner or outer sheath of the cable. Under IEC 60079-14, direct entry glands are permitted if the cable is sufficiently round, compact, filled with non-hygroscopic extrusion, and when the enclosure internal volume or gas group doesn't dictate a compound barrier gland. Barrier glands, conversely, inject a two-part epoxy resin around individual conductors to block gas migration through internal interstices. Direct entry saves extensive labor time and installation costs whenever regulatory conditions permit.
For parallel metric threads (such as M20 to M100 x 1.5 pitch), international explosion-proof standards require a minimum of 5 fully engaged threads with an engagement depth of at least 8mm for Group II enclosures. For tapered threads such as American National Pipe Taper (NPT), a minimum of 5 full threads of effective engagement is mandatory to preserve the physical flame cooling path.
While nickel-plated brass CW614N provides excellent electrical grounding, mechanical strength, and cost-efficiency in standard industrial and petrochemical refinery installations, 316L grade austenitic stainless steel is strictly recommended for offshore marine decks, splash zones, sulfur-rich petrochemical refineries, and fertilizer plants where sulfuric or nitric acid vapors and marine airborne salts accelerate brass de-zincification.
Explosion-proof enclosures frequently operate outdoors in severe maritime weather where driving rain, monsoons, or accidental activation of fire deluge extinguishing systems occur. Ingress Protection (IP68) guarantees water tight integrity under 10 bar pressure, while DTS01 deluge testing proves the gland will not allow water to enter the internal flameproof enclosure even when blasted with high-temperature hydrocarbon fire deluge extinguishing foams.
