EPDM Gland Sealing Washer
The EPDM Gland Sealing Washer establishes a dependable, liquid- and dust-tight seal at the threaded interface between cable glands and industrial enclosures. Engineered from high-density, peroxide-cured EPDM elastomer, this component maintains uniform radial and axial sealing pressure to prevent environmental ingress in harsh outdoor and industrial applications.
Product Overview
The EPDM Gland Sealing Washer establishes a dependable, liquid- and dust-tight seal at the threaded interface between cable glands and industrial enclosures. Engineered from high-density, peroxide-cured EPDM elastomer, this component maintains uniform radial and axial sealing pressure to prevent environmental ingress in harsh outdoor and industrial applications.
Key Features
Elastomer Integrity: Formulated with peroxide-cured EPDM to ensure exceptional resistance to UV radiation, ozone, and atmospheric aging.
Sealing Profile: Flat and stepped cross-section options conform tightly under thread tightening, preventing moisture migration along thread flanks.
Load Distribution: Evenly distributes clamping forces across mounting surfaces, avoiding localized stress concentrations and washer extrusion.
Thermal Elasticity: Retains high recovery elasticity across extreme temperature fluctuations, securing long-term IP66/IP68 protection.
Technical Specifications
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Thread Standards |
Metric (M12 to M63), PG (PG7 to PG48), NPT, and G threads. |
|
Inner Diameter (ID) |
12.5 mm to 63.5 mm (engineered to fit standard cable gland thread shanks). |
|
Outer Diameter (OD) |
Optimized profile diameters matching standard gland locknut footprints. |
|
Thickness Options |
1.5 mm, 2.0 mm, 3.0 mm (custom dimensions available upon request). |
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Material Hardness |
70 ± 5 Shore A (balanced for optimal sealing recovery and compression). |
|
Operating Temperature |
-40°C to +120°C (continuous service), up to +150°C (short-term peak). |
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Ingress Protection Rating |
Up to IP68 (5 bar) when installed with correctly torqued glands. |
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Chemical Compatibility |
Excellent resistance to water, dilute acids, alkalis, and ozone; limited resistance to petroleum hydrocarbons. |
Product Options
Compound Variations: Standard EPDM, peroxide-cured EPDM (low compression set), and alternative silicone or NBR grades for specialized chemical exposure.
Profile Geometries: Plain flat washers, captive ribbed washers, and centering-lip designs for precise alignment.
Visual Color Coding: Standard black, industrial grey (RAL 7035/7001), or custom-pigmented batches.
Packaging Solutions: Bulk industrial bags (1,000 pcs/polybag) or automated-assembly tape packaging.
Applications
Electrical Control Panels: Outdoor automation enclosures and low-voltage distribution switchboards.
Industrial Machinery: Machine tool connection boxes and heavy-duty robotic control units.
Renewable Energy Systems: Solar photovoltaic combiner boxes and wind turbine nacelle junction enclosures.
Infrastructure & Transportation: Railway signaling housings and marine deck equipment.
OEM & ODM Customization
Non-Standard Geometries: Custom inner diameter, outer diameter, and thickness machined or compression-molded to proprietary enclosure designs.
Compound Engineering: Customized hardness (50 to 85 Shore A) or specialized formulations to meet UL94 flame retardancy (HB/V0) or FDA food-contact standards.
Rapid Prototyping: In-house mold design and CNC tooling capabilities allow sample delivery for custom profiles within 7 business days.
Quality Control & Compliance
Regulatory Compliance: Manufactured under ISO 9001 certified quality management systems, meeting full RoHS and REACH regulatory frameworks.
Dimensional Verification: 100% optical sorting and precision Vernier gauge inspection, maintaining strict inner/outer diameter and thickness tolerances within ±0.1 mm.
Polymer Testing: Incoming raw material verification via density, ash content, and FTIR spectroscopy analysis to confirm EPDM polymer purity.
Physical Property Testing: Tensile strength, elongation at break, and compression set evaluated in compliance with ASTM D412 and ASTM D395 standards.
Traceability Documents: Material Test Reports (MTR) and lot-specific Certificates of Analysis (CoA) provided with shipments.
Frequently Asked Questions
Q: How do I select the correct washer size for my cable gland?
A: Match the inner diameter of the washer to the nominal outer thread diameter of the cable gland (e.g., an M20 gland requires an M20 washer with a ~20.5 mm ID). Ensure the outer diameter covers the entire contact footprint of the gland locknut.
Q: What is the benefit of peroxide-cured EPDM over standard sulfur-cured EPDM?
A: Peroxide curing yields a denser molecular cross-link structure, resulting in a significantly lower compression set, superior thermal aging resistance, and prevention of surface blooming or sulfur reversion over prolonged outdoor exposure.
Q: Are these washers suitable for direct sunlight and outdoor weathering?
A: Yes. EPDM features a saturated polymer backbone that offers inherent resistance to UV radiation and ozone, preventing surface cracking or hardening under direct sunlight.
Q: Can EPDM washers be used in oily or fuel-rich environments?
A: EPDM is not recommended for continuous contact with petroleum-based oils, greases, or hydraulic fuels. For oil-heavy industrial environments, NBR or FKM (Viton) alternatives are available upon request.
Q: What is the minimum order quantity (MOQ) for standard versus custom items?
A: Standard catalog sizes stocked in our warehouse carry an MOQ of 1,000 pieces. Custom dimensions or specialized compound formulations require an MOQ of 5,000 pieces.
Q: What is the typical lead time for bulk orders?
A: Standard catalog items ship within 3 to 5 business days. Custom molded parts require 10 to 14 business days, inclusive of tooling preparation and sample approval.
Request a Quote
To receive a prompt and accurate technical quotation, please provide the following details:
Product Model / Specification: (e.g., thread standard size such as M20 or PG16)
Required Quantity: (per order or estimated annual volume)
Material Requirement: (Standard EPDM, Peroxide-cured EPDM, or alternative elastomer)
Dimensional Parameters: (Inner diameter, outer diameter, and thickness if non-standard)
Operating Environment: (Temperature extremes, outdoor UV exposure, or chemical contact)
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