Sealing Ring: Outer Diameter 5mm to 120mm

Q: How do I select the right sealing ring material for my application?

Choose NBR for oil resistance, EPDM for weather/ozone resistance, silicone for high/low temperature, FKM for chemicals, or TPE for cost-effective general use. Consider temperature, media exposure, and certifications needed.

Q: What causes sealing ring failure in cable glands?

Common causes include incorrect size (mismatched ID/OD), material degradation from UV/chemicals, excessive compression causing permanent set, temperature extremes beyond rating, or improper installation damaging the ring.

Q: Are sealing rings interchangeable between gland brands?

Not always. While some metric sizes are standardized, profile design and material specifications vary. Always verify dimensions, hardness, and chemical compatibility before substitution to maintain IP rating.

Component Specifications

Definition

A sealing ring is a precision-engineered elastomeric or polymeric component used in aluminum cable glands to create a hermetic seal between the cable entry point and the gland body. It functions by compressing against both the cable sheath and gland housing, filling microscopic gaps to block moisture, dust, gases, and contaminants from entering electrical enclosures. These rings maintain seal integrity under varying temperatures, pressures, and mechanical stresses while accommodating cable movement.

Working Principle

The sealing ring operates on the principle of radial compression and surface conformity. When the cable gland is tightened, the ring deforms elastically to fill irregularities between the cable outer diameter and gland inner diameter. This creates continuous circumferential contact pressure, forming a barrier against environmental ingress. The ring's material properties ensure it maintains sealing force without permanent deformation or degradation over time.

Materials

Nitrile rubber (NBR), Ethylene Propylene Diene Monomer (EPDM), Silicone (VMQ), Fluorocarbon (FKM/Viton), Polyurethane (PU), or Thermoplastic Elastomers (TPE). Material selection depends on temperature range (-60°C to +250°C), chemical resistance, UV stability, and compliance requirements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	40 to 90 Shore A
Cross Section	Circular, rectangular, or X-profile
Inner Diameter	3mm to 100mm (matches cable OD)
Outer Diameter	5mm to 120mm
Compression Set	<25% (per ASTM D395)
Pressure Rating	Up to 10 bar
Temperature Range	-40°C to +150°C (standard)

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, ISO 14001, DIN EN 62444, IEC 62444, UL 514B, ATEX/IECEx

Parent Products

This component is used in the following industrial products

Aluminum Cable Gland

An aluminum cable gland is a mechanical device used to attach and secure the end of an electrical cable to equipment, providing strain relief and environmental sealing.

View Product Details

Cable Gland

A mechanical device used to securely attach and seal the end of an electrical cable to equipment, providing strain relief and environmental protection.

View Product Details

Engineering Analysis

Risks & Mitigation

Incorrect sizing leads to leakage
Material incompatibility causes swelling/cracking
Over-tightening damages ring structure
UV degradation in outdoor applications
Compression set reduces sealing force over time

FMEA Triads

Trigger: Incorrect ring inner diameter
Failure: Inadequate compression on cable surface
Mitigation: Measure cable OD precisely; use rings with ±0.5mm tolerance; select adjustable-profile rings

Trigger: Chemical exposure incompatible with material
Failure: Swelling, cracking, or hardening of ring
Mitigation: Conduct chemical compatibility testing; select FKM for aggressive chemicals; implement regular inspection schedules

Trigger: Excessive gland tightening torque
Failure: Permanent deformation or extrusion of ring
Mitigation: Use torque wrenches per manufacturer specs; install compression limiters; train personnel on proper installation

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.2mm on ID/OD (ISO 3601-1), compression force 15-30% of cross-section

Test Method

IP testing per IEC 60529, pressure decay testing, thermal cycling per IEC 60068-2-14, material certification per UL 94/UL 746C

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Sealing Ring

6 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Aier Ventilation

Shanghai, CN

Also makes: Access Doors, HVAC Systems, Gate Assembly and 2 more