Air Filters and Chemical Filtration

Mini-Pleat ULPA Filter

A shallow ultra-low-penetration air filter with densely spaced microglass mini-pleats for very high particle capture in semiconductor and precision cleanrooms.

U15–U16 Media Options
Dense Mini-Pleat Pack
Shallow Aluminium Frame
Uniform Terminal Airflow

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Product Introduction

The mini-pleat ULPA filter uses ultra-fine glass-microfibre media folded into a high-area pack with narrow thermoplastic separators. Precise pleat spacing allows the panel to achieve U15 or U16 class options while remaining shallow enough for cleanroom ceilings and fan filter units. The pack is fully potted into an anodized-aluminium frame, protected by expanded-metal grids and completed with gasket, gel or knife-edge sealing. Its high filtration class and even face velocity suit semiconductor, optics and other ultra-clean manufacturing zones.

Key Features

High-area mini-pleat geometry supports U15 or U16 filtration within a compact terminal-panel depth.

Uniform thermoplastic separators keep narrow airflow channels open across the whole media pack.

An anodized-aluminium frame and sealed corners provide a clean, rigid perimeter for ceiling installation.

Open protective grids shield the delicate ULPA media while preserving even downstream air distribution.

Customer Product Concerns

Ultra-clean processes require filtration beyond normal HEPA classes while maintaining manageable resistance and uniform terminal airflow.

A conventional HEPA filter does not provide the selected U-class particle retention.Ultra-fine microglass media and controlled mini-pleat manufacturing support U15 or U16 configurations.

Very dense media causes uneven velocity across a large terminal face.Precisely spaced pleat channels distribute air through the full filter area instead of concentrating flow paths.

The delicate high-efficiency pack is easily damaged during FFU installation.Protective grids and a rigid extruded-aluminium perimeter shield the pack from handling contact.

A deep filter reduces usable service space above the cleanroom ceiling.The high-area mini-pleat pack fits within common 80–150 mm shallow terminal frames.

Typical Applications

Semiconductor wafer fabricationPrecision optics manufacturingFlat-panel display cleanroomsHard-disk media productionUltra-clean metrology laboratories

Technical Parameters

Representative construction ranges for mini-pleat ULPA panels are shown below.

Core Material	Low-penetration glass-microfibre ULPA media with precisely spaced thermoplastic mini-pleat separators
Panel Thickness	80–150 mm overall frame depth
Effective Width	305–610 mm nominal face width
Maximum Length	Up to 1220 mm nominal face length
Steel Facing Thickness	0.4–0.6 mm powder-coated or stainless-steel expanded faceguard
Core Density	Approximately 35–55 kg/m³ equivalent mini-pleat media density
Thermal Conductivity	Approximately 0.035–0.045 W/(m·K) for the dry microglass ULPA pack
Surface Finish	Natural anodized-aluminium frame with clean white or stainless faceguards
Joint Type	EPDM gasket, polyurethane gel channel or extruded knife-edge perimeter
Customization	Available based on the intended application and operating environment.

Available Options

U15 or U16 efficiency class80 mm, 90 mm or 150 mm frame depthGasket, gel or knife-edge sealOne-sided or two-sided faceguard

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