Cleanroom Air Distribution Systems

Explosion Relief Damper

A lightweight hinged relief panel held by calibrated releases so a rapid internal pressure rise can open a defined vent area and discharge safely.

Lightweight Honeycomb Relief Panel
Calibrated Release Mechanism
Hinged Controlled Opening
Tethered or Deflected Travel

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Product Introduction

The explosion relief damper mounts a rigid aluminum-faced honeycomb panel in a structural angle frame. Magnetic, trigger or fracture releases hold the panel against a perimeter seal during normal operation. A rapid internal pressure rise overcomes the selected release load and swings or lifts the panel clear of the opening. Hinges, spring beds, tethers or deflector plates control panel travel and reaction force, while reclosable release arrangements allow the opening to be reset after inspection when the components remain serviceable.

Key Features

Low-mass honeycomb construction reduces panel inertia so the relief area opens rapidly under pressure impulse.

Calibrated magnetic, mechanical trigger or fracture releases establish the opening force independently of panel weight.

Hinges, tethers and optional deflectors constrain movement and direct the discharged pressure away from adjacent access routes.

A continuous perimeter seal limits weather and process-air leakage during normal enclosure operation.

Customer Product Concerns

Explosion relief requires a sufficiently large free opening, predictable release force and a discharge path that does not expose personnel or nearby equipment to the moving panel or vented products.

A heavy closure opens too slowly and allows damaging pressure to build inside the protected enclosure.An aluminum honeycomb panel provides a rigid weather surface with substantially lower moving mass.

Normal process pressure or vibration causes nuisance opening.The number and load of the release elements establish a repeatable hold-down force above ordinary operating pressure.

An unrestrained relief panel becomes a projectile after opening.Hinges, cable tethers and energy-absorbing supports keep the panel attached and control its travel.

The vent discharge is directed toward a walkway or sensitive equipment.Panel orientation and steel deflector geometry route the relieved flow toward a designated safe discharge zone.

Typical Applications

Dust collector explosion ventingDryer and process filter protectionBattery material handling enclosuresPowder conveying equipmentIndustrial room or equipment pressure relief

Technical Parameters

Representative construction ranges for a hinged reusable explosion relief damper are shown below.

Core Material	Lightweight aluminum honeycomb core between aluminum face sheets with perimeter sponge seal
Panel Thickness	25–75 mm rigid honeycomb relief panel
Effective Width	300–2000 mm nominal clear relief opening width
Maximum Length	Up to 3000 mm maximum panel dimension
Steel Facing Thickness	2.0–5.0 mm structural angle frame, release arms and deflector plates
Core Density	Approximately 40–80 kg/m³ effective aluminum honeycomb core density
Thermal Conductivity	Approximately 0.8–2.0 W/(m·K) effective through-panel conductivity
Surface Finish	Natural or coated aluminum panel with painted carbon-steel or stainless release hardware
Joint Type	Top-hinged angle frame with perimeter seal, calibrated magnetic or trigger releases and restrained panel travel
Customization	Available based on the intended application and operating environment.

Available Options

Side-wall, rooftop or round opening configurationMagnetic, mechanical trigger or replaceable fracture releaseCable tether or steel deflector travel controlWeather hood and corrosion-resistant hardware

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