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Cleanroom Installation Accessories
Duct Flange Gasket
A closed-cell EPDM rectangular gasket that compresses between mating duct flanges to close air-leak paths around the joint.
- Closed-Cell EPDM
- Four Bolt Holes
- Rectangular Air Opening
- Compressible Cut Edge
Product Introduction
The gasket is cut from thick black closed-cell EPDM with a central rectangular air opening and four corner bolt holes. Its broad perimeter compresses between mating duct flanges while the cellular edge accommodates minor surface variation.
Key Features
Four holes align with a simple corner-bolted flange pattern.
A broad sealing land distributes compression around the opening.
The resilient cut edge accommodates minor flange irregularity.
Customer Product Concerns
Rigid or uneven duct flanges require a compressible interface to prevent leakage around the air opening.
Minor flange waviness leaves leakage paths.Compressible EPDM conforms to local surface variation.
Misaligned holes distort the gasket during assembly.The four-hole pattern is cut to the mating flange dimensions.
Thin seals extrude under bolt pressure.Selected thickness and broad sealing land distribute compression.
Open-cell materials absorb moisture.Closed-cell EPDM limits fluid uptake through the gasket body.
Typical Applications
Cleanroom supply ductsExhaust duct jointsAir-handler connectionsRectangular damper flanges
Technical Parameters
Typical construction ranges for a closed-cell EPDM rectangular duct flange gasket are listed below.
| Core Material | Black closed-cell EPDM foam or solid EPDM sheet |
|---|---|
| Panel Thickness | 3-20 mm gasket thickness |
| Effective Width | 20-100 mm sealing-land width |
| Maximum Length | Up to 2000 mm one-piece gasket length |
| Steel Facing Thickness | 0.50-3.00 mm compatible duct flange sheet thickness |
| Core Density | Approximately 100-250 kg/m³ for closed-cell EPDM foam |
| Thermal Conductivity | Approximately 0.04-0.08 W/(m·K) for closed-cell EPDM |
| Surface Finish | Black fine-cell matte cut surface |
| Joint Type | Four-bolt compressed rectangular flange joint |
| Customization | Available based on the intended application and operating environment. |
Available Options
Solid or closed-cell EPDMAdhesive-backed surfaceCustom bolt patternDie-cut or waterjet-cut profile
Planning a Duct Flange Gasket specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
