Product Overview
The Nickel-Plated Brass Explosion-Proof Cable Gland Enlarger provides a secure, certified thread conversion solution when an electrical enclosure’s tapped entry hole is smaller than the required cable gland thread.
Engineered for extreme industrial and hazardous environments, this heavy-duty metal thread adapter carries Ex d IIC Gb / Ex e II Gb / Ex tD A21 dual explosion-proof certifications. Built with premium nickel-plated brass and a high-performance Neoprene rubber seal, it provides IP66 waterproof and dustproof protection while resisting acid, alkali, and atmospheric corrosion.
Whether adapting Metric, NPT, PG, or G thread profiles, this cable gland enlarger ensures full flameproof containment, structural integrity, and long-term strain relief for oil & gas, chemical, and industrial automation facilities.
Key Features
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Hazardous Area Certified: Fully compliant with Ex d IIC Gb, Ex e II Gb, and Ex tD A21 explosion protection standards for explosive gas (Zone 1, Zone 2) and combustible dust (Zone 21) environments.
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IP66 Waterproof & Dustproof Seal: Outfitted with a durable Neoprene rubber sealing ring that withstands up to 10 Pa pressure, preventing water, oil mist, and dust ingress.
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Corrosion-Resistant Metallurgy: Heavy-duty nickel-plated brass construction offers superior mechanical strength and resistance against acid, alkali, and atmospheric oxidation.
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Extended Thermal Operating Range: Functions reliably across extreme static temperatures from -60°C to +100°C (short-term up to 120°C) and dynamic temperatures from -20°C to +80°C (short-term up to 100°C, halogen-free).
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V0 Flame Retardant Rating: Built in accordance with UL94 V0 flame-resistance requirements for maximum operational safety.
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Flexible OEM Customization: Available in a wide variety of thread size conversions (Metric, NPT, PG, G) with custom thread lengths and matching accessories.
Applications
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Hazardous Zone Enclosures: Adapting cable gland connections on explosion-proof junction boxes, switchgear, and terminal cabinets in Zone 1, Zone 2, and Zone 21 areas.
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Oil, Gas & Petrochemical Refineries: Secure cable entry adaptation in facilities exposed to volatile hydrocarbon gases and severe temperature variations.
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Chemical & Heavy Processing Plants: Cable entry wiring subject to harsh chemical vapors, acids, and high washdown pressures.
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Industrial Automation & Power Distribution: Connecting mismatched thread entries between machinery housing, motors, and external cable glands.
Technical Specifications
| Parameter | Specification Details |
| Product Name | Metal Cable Gland Enlarger / Thread Adapter |
| Body Material | High-Quality Nickel-Plated Brass |
| Sealing Washer Material | Neoprene Rubber |
| Explosion-Proof Markings | Ex d IIC Gb / Ex e II Gb / Ex tD A21 |
| Ingress Protection Rating | IP66 (Resists 10 Pa water pressure) |
| Flame Retardant Rating | UL94 V0 |
| Static Operating Temperature | -60°C to +100°C (Short-term up to 120°C) |
| Dynamic Operating Temperature | -20°C to +80°C (Short-term up to 100°C, Halogen-Free) |
| Thread Compatibility | Metric (M), NPT, PG, G Threads (Custom lengths available) |
| Product Properties | Waterproof, Dustproof, Acid & Alkali Corrosion Resistant |
| Optional Accessories | Sealing Washer, Locknut (Available upon request) |
Product FAQ
Q1: What is the main function of a cable gland enlarger?
A cable gland enlarger is used when the tapped hole size on an electrical enclosure or junction box is smaller than the male connection thread of the cable gland you need to install. It converts the smaller male thread into a larger female thread without replacing the enclosure.
Q2: Can this enlarger be used in Ex d and Ex e hazardous areas?
Yes. This enlarger carries certified Ex d IIC Gb (flameproof), Ex e II Gb (increased safety), and Ex tD A21 (dust ignition-proof) markings, making it fully compliant for hazardous Gas Zone 1 / Zone 2 and Dust Zone 21 environments.
Q3: What is the benefit of the Neoprene rubber seal?
The Neoprene rubber sealing ring provides robust IP66 ingress protection against high-pressure water jets, oil mist, and fine dust. It also maintains seal elasticity across extreme cold and hot conditions (-60°C to +100°C static) without embrittlement.
Q4: Can you customize specific thread types and thread lengths?
Yes. As a direct manufacturer, we produce custom enlarger fittings with combinations of Metric, NPT, PG, and G threads, as well as extended thread lengths and custom accessories (such as locknuts and sealing washers) tailored to your engineering project specifications.
