INDUSTRY COMPONENT

Sealing Gland

A sealing gland is a mechanical component used to create a secure, sealed connection between a wire harness and an enclosure, providing strain relief and environmental protection.

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Component Specifications

Definition
A sealing gland, specifically within industrial wire harness strain relief bushings, is a precision-engineered component designed to secure and seal the entry point of cables or wires into an enclosure. It functions by compressing a sealing element (typically an elastomeric gasket or O-ring) against the cable and the enclosure wall, creating a watertight, dustproof, and strain-resistant seal. This prevents environmental contaminants from entering the enclosure while also anchoring the cable to absorb mechanical stress, vibrations, and pull forces, thereby protecting internal electrical connections from damage.
Working Principle
The sealing gland operates on a compression sealing principle. When the gland nut is tightened, it axially compresses a sealing element (e.g., a rubber grommet or conical seal) between the gland body and the enclosure. This compression radially deforms the seal against both the outer jacket of the cable and the inner wall of the mounting hole, creating a hermetic barrier. Simultaneously, the mechanical grip of the gland body and nut provides strain relief by clamping the cable, transferring any tensile or vibrational loads to the enclosure rather than the internal terminations.
Materials
Body: Nylon 6/6, Polyamide, Stainless Steel (AISI 304/316), Brass, Aluminum. Sealing Element: Nitrile Rubber (NBR), Ethylene Propylene Diene Monomer (EPDM), Silicone (VMQ), Fluorocarbon (FKM/Viton). Gland Nut: Same as body material or coated steel.
Technical Parameters
  • IP Rating IP68, IP69K
  • Thread Size M12x1.5 to M40x1.5 (metric), PG7 to PG21 (conduit), NPT 1/4" to 1"
  • Pressure Rating Up to 10 bar (with appropriate seal)
  • EMI/RFI Shielding Optional (with metallic components or conductive seals)
  • Temperature Range -40°C to +120°C (dependent on seal material)
  • UL/CSA Recognition Yes (for flame-retardant materials)
  • Cable Diameter Range 3mm to 25mm
Standards
ISO 9001, DIN 40050-9, IEC 60529, UL 94, RoHS, REACH

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Sealing Gland.

sealing gland cable gland strain relief bushing wire harness seal IP68 gland industrial cable entry waterproof connector DIN 40050 compression seal EPDM gasket Sealing Gland in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Industrial Wire Harness Strain Relief Bushing

Mechanical component that secures and protects wire harnesses at entry/exit points.

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A liquid level sensor that uses a buoyant float to actuate an electrical switch.

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Engineering Analysis

Risks & Mitigation
  • Incorrect installation leading to seal failure
  • Material incompatibility causing chemical degradation
  • Over-tightening damaging the cable or threads
  • Undersized gland allowing cable pull-out
  • Vibration loosening the gland nut over time
FMEA Triads
Trigger: Improper torque application during installation
Failure: Insufficient compression leads to seal leakage; over-torque cracks the gland body or deforms the seal permanently
Mitigation: Use a calibrated torque wrench following manufacturer specs; implement installer training and visual torque indicators
Trigger: Chemical exposure incompatible with seal material
Failure: Seal swelling, cracking, or degradation, resulting in loss of environmental protection
Mitigation: Conduct material compatibility testing for specific chemicals; select FKM or EPDM seals for aggressive environments
Trigger: High vibration or thermal cycling
Failure: Gland nut loosening, loss of compression, and eventual seal failure
Mitigation: Apply thread-locking adhesive; use glands with locknuts or spring washers; specify designs with vibration-resistant features

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Thread tolerance: 6g for metric threads per ISO 965-1; cable entry hole tolerance: ±0.5mm; seal compression force: 20-30 N·m per diameter range
Test Method
IP rating tested per IEC 60529 (water/dust ingress); vibration testing per IEC 60068-2-6; pull-out force tested per UL 2238; material flammability per UL 94; chemical resistance per ASTM D471

Buyer Feedback

★★★★☆ 4.7 / 5.0 (14 reviews)

"The technical documentation for this Sealing Gland is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Sealing Gland so far."

"Testing the Sealing Gland now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What is the difference between a sealing gland and a standard cable gland?

A sealing gland specifically incorporates enhanced sealing elements and strain relief features designed for wire harness applications in harsh environments, often meeting higher IP ratings (like IP68/IP69K) and providing superior vibration resistance compared to basic cable glands.

How do I select the right sealing gland material?

Choose based on environment: Nylon for general use, stainless steel for corrosive/outdoor settings. Select seal material: NBR for oils, EPDM for weather/steam, Silicone for high/low temperatures, FKM for chemicals. Ensure compatibility with cable diameter and thread type.

Can sealing glands be reused?

Typically, yes, but the sealing element may degrade with repeated compression. Inspect seals for cracks or permanent deformation after disassembly. It is recommended to replace the sealing element during maintenance for guaranteed performance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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