Air Filters and Chemical Filtration

Hydrophobic HEPA Filter

A moisture-resistant HEPA panel using hydrophobic membrane or treated glass media and corrosion-resistant construction for humid cleanroom air systems.

Hydrophobic Filter Media
High-Humidity Operation
Corrosion-Resistant Frame
Sealed Pack Edges

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Product Introduction

The hydrophobic HEPA filter is configured for cleanroom supply or exhaust streams that experience high relative humidity, intermittent condensation or nearby washdown activity. The media pack uses expanded PTFE or a water-repellent treated glass microfibre, with sealed edges that limit moisture entry into the pleat pack. An anodized-aluminium or stainless-steel frame avoids exposed absorbent board, and compatible polyurethane potting anchors the media. Drain-tolerant faceguard details and a closed-cell gasket complete a construction intended to maintain clean geometry in damp service.

Key Features

Hydrophobic membrane or treated microglass media limits water uptake into the filtration layer.

Non-absorbent aluminium or stainless-steel framing suits repeatedly humid operating conditions.

Sealed pack edges reduce the risk of moisture tracking between the media and support frame.

A corrosion-resistant faceguard protects pleats without introducing an untreated steel surface.

Customer Product Concerns

Water vapour and occasional droplets can raise resistance, weaken untreated pack edges and corrode conventional filter hardware.

Condensation wets the media and sharply increases pressure drop.Hydrophobic filter media resists liquid-water penetration and reduces moisture retention within the pleat structure.

Cardboard or untreated steel components deteriorate in humid service.Anodized aluminium, stainless steel and polymer-compatible seals remove absorbent and corrosion-prone frame materials.

Moisture enters the pack through exposed cut media edges.Continuous perimeter potting isolates the pleat ends and bonds them to the frame.

Water remains trapped behind a dense protective grille.Open corrosion-resistant faceguards and suitable mounting orientation allow the exposed surface to dry.

Typical Applications

Humid pharmaceutical processing roomsWashdown-adjacent clean areasBiotechnology exhaust terminalsFood and beverage clean zonesHigh-humidity laboratory ventilation

Technical Parameters

Representative construction ranges for a hydrophobic cleanroom HEPA panel are listed below.

Core Material	Supported ePTFE membrane or water-repellent treated glass-microfibre HEPA media
Panel Thickness	69–150 mm overall filter depth
Effective Width	305–610 mm nominal face width
Maximum Length	Up to 1220 mm nominal face length
Steel Facing Thickness	0.5–0.8 mm stainless-steel or corrosion-coated faceguard
Core Density	Approximately 25–45 kg/m³ equivalent hydrophobic media-pack density
Thermal Conductivity	Approximately 0.032–0.043 W/(m·K) for the dry hydrophobic media pack
Surface Finish	Natural anodized aluminium or brushed stainless steel with non-absorbent sealed edges
Joint Type	Closed-cell EPDM gasket or polyurethane gel seal with continuous pack potting
Customization	Available based on the intended application and operating environment.

Available Options

ePTFE membrane or treated microglass mediaAnodized-aluminium or 304 stainless-steel frameGasket or gel perimeter sealUpstream and downstream corrosion-resistant faceguards

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