Selecting the right Double Compression Cable Gland is essential when working with armored cables in industrial installations. It ensures mechanical stability, sealing, strain relief, and in many cases, electrical continuity. At Volt Metal Industries, we manufacture and export brass double compression cable glands designed for reliability in demanding global environments.
This guide covers how these glands work, their parts, how to choose the right size, and common application considerations.
What is a Double Compression Cable Gland?
A Double Compression Cable Gland is a mechanical device that provides two levels of sealing:
- Inner compression—on the cable sheath.
- Outer compression—on the armor or outer layer.
This dual sealing system offers secure cable retention, enhanced IP protection, and improved grounding performance in armored cable installations. It is especially used in:
- Industrial plants.
- Electrical distribution systems.
- Power generation and transmission.
- Hazard-area equipment (when rated accordingly).
Volt Metal Industries manufactures these glands only in brass, ensuring durability and corrosion resistance suitable for export applications and harsh site conditions.
Key Parts of a Double Compression Cable Gland:
A standard double compression gland assembly typically includes:
- Check nut – Brass nickel-plated for holding the nipple in case of indirect fitting with the switchgear instrument.
- Flat rubber – Made of rubber for a proof fitting.
- Nipple – Brass, nickel-plated for fixing the switchgear instrument in case of direct fitting.
- Rubber ring – Made of fine rubber for gripping the under armour of the cable.
- Taper cone – Brass, nickel-plated for gripping the armour of cable by pressing the cone ring.
- Cone ring – Brass nickel-plated for gripping armour after removing PVC sheathing.
- Gland body – Brass, nickel-plated. Holds the compression & cone ring, taper cone & nipple.
- Rubber ring – Made of rubber for gripping the outer PVC sheathing of the cable.
- Compression ring – Brass, nickel-plated, for compressing the cable in the rubber ring.
We also offer accessories like reducers, adapters, stopper plugs, and special threading as required for export specifications.
Size Chart for Double Compression Cable Gland:
Note: For export, thread standards (Metric / NPT / PG) are supplied as per destination market requirements.
How to Select the Right Gland Size:
- Measure Cable Outer Diameter: Use a caliper or the manufacturer’s datasheet to find the accurate OD.
- Check Cable Construction: Verify if the cable is armored (SWA, STA, braided, etc.).
- Match OD Range to Chart: Select a gland where the cable OD fits comfortably within the specified range.
- Confirm Thread Compatibility: Check enclosure, panel, or junction box entry size and thread type.
- Add Accessories if Needed: Locknut, earth tag, or shroud based on installation conditions.
Why Use Brass Double Compression Cable Glands?
- High resistance to corrosion and weather.
- Strong mechanical grip.
- Reliable sealing in dusty or humid environments.
- Long service life.
- Preferred for export-grade industrial use.
Volt Metal Industries manufactures these glands under strict inspection. Each gland undergoes piece-by-piece quality checks to achieve a consistent finish and performance.
FAQs:
Q1: Are double compression glands used only for armored cables?
Yes, these glands are specifically designed for armored cable applications where dual sealing and armor clamping are required.
Q2: Can these glands be supplied in a nickel-plated finish?
Yes. Nickel plating is available for enhanced corrosion resistance, especially for coastal or chemical environments.
Q3: Do you offer customization for private branding or packaging?
Yes. For qualifying order quantities, branding and packing customization can be provided.
Contact Volt Metal Industries:
For catalog, datasheets, price offers, and export inquiries, share your cable details + quantity, and our team will assist with the correct gland selection.
