Editorial Technical Reference

HEPA/ULPA Filter Housing

This page explains how HEPA/ULPA Filter Housing is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A structural enclosure designed to securely hold and seal HEPA or ULPA filters within sterile air generation systems.

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Product Specifications

Technical details and manufacturing context for HEPA/ULPA Filter Housing

Definition
The HEPA/ULPA Filter Housing is a critical component of Sterile Air Generation Systems that provides a rigid, airtight frame to mount high-efficiency particulate air (HEPA) or ultra-low penetration air (ULPA) filters. It ensures proper filter sealing, maintains airflow integrity, prevents bypass leakage, and facilitates filter installation, replacement, and maintenance while protecting the filter media from damage. The housing is available in materials such as stainless steel (304/316L), galvanized steel, and powder-coated aluminum, with surface finishes ranging from 0.4 to 0.8 μm Ra to prevent particle accumulation. Nominal sizes accommodate standard HEPA/ULPA filters from 305×305 mm to 610×610 mm, with airflow capacities from 500 to 4000 m³/h (per ISO 29463). Operating pressure ranges from 1.0 to 1.6 MPa, and operating temperature from -40 to 85°C, limited by seal material. Leakage rate is ≤0.01% at rated pressure (ISO 29463), and filter efficiency ranges from 99.97% to 99.999% (ISO 29463). Seal types include gel or gasket, with gel providing high integrity and gasket for ease of replacement. Pressure drop is ≤250 Pa at rated airflow (ISO 29463), and weight ranges from 15 to 60 kg depending on size and material thickness. Ingress protection is IP54 to IP65 (IEC 60529) for washdown or outdoor installations. These values are directory reference ranges; verify model-specific specifications with the legal manufacturer or supplier.
Working Principle
The housing creates a sealed chamber around the filter media, directing contaminated air through the filter while preventing unfiltered air from bypassing the filtration media. It maintains pressure differentials, supports the filter structure, and provides access ports for testing and maintenance. The housing is designed to withstand operating pressures up to 1.6 MPa and temperatures up to 85°C, ensuring the filter remains effective. The seal type (gel or gasket) ensures a leak-tight interface, and the housing's surface finish minimizes particle accumulation. Proper installation and maintenance are essential to maintain the housing's integrity and prevent bypass leakage.
Common Materials
Stainless steel (304/316L), Galvanized steel, Powder-coated aluminum
Technical Parameters
ParameterTypical rangeNotes & selection driver
Nominal Size305×305–610×610 mmStandard sizes for HEPA/ULPA filters
Airflow Capacity500–4000 m³/hMatch to filter media area and system pressure dropISO 29463
Operating Pressure1.0–1.6 MPa
Operating Temperature-40–85 °CSeal material limits; above 85°C gasket degrades
Leakage Rate≤0.01 %At rated pressure, ensures no bypassISO 29463
Filter Efficiency99.97–99.999 %For HEPA to ULPA gradesISO 29463
Material Grade304–316L SS316L for corrosive or high-humidity environmentsASTM A240
Surface Finish0.4–0.8 μm RaSmooth finish prevents particle accumulationISO 4287
Seal TypeGel–GasketGel seal for high integrity, gasket for ease of replacement
Pressure Drop≤250 PaAt rated airflow, affects energy consumptionISO 29463
Weight15–60 kgDepends on size and material thickness
Ingress ProtectionIP54–IP65IP65 for washdown or outdoor installationsIEC 60529

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Filter Frame
    Provides structural support and mounting surface for the filter media
    Material: Stainless steel or aluminum
  • Sealing Gasket Part
    Creates an airtight seal between the filter and housing to prevent bypass leakage
    Material: Silicone rubber or neoprene
  • Access Door
    Allows for filter installation, replacement, and inspection while maintaining seal integrity
    Material: Stainless steel with viewing window
  • Mounting Brackets Part
    Secures the housing to the ductwork or system structure
    Material: Stainless steel
  • Pressure Test Ports Part
    Provides access points for in-place filter testing and integrity verification
    Material: Stainless steel fittings
  • Housing Body
    The shell that forms the sealed chamber around the filter; everything else bolts to it.
    Material: Stainless steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Sterile Air Generation System
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 2500 Pa differential pressure
flow rate: 0.1 to 2.0 m³/s per filter module
temperature: -20°C to 80°C
sealing integrity: Leak rate < 0.01% of rated flow at test pressure
Media Compatibility
✓ Pharmaceutical grade air streams ✓ Electronics cleanroom environments ✓ Hospital surgical suite ventilation
Unsuitable: High moisture environments with condensation risk (>85% RH with temperature cycling)
Sizing Data Required
  • Required air volume (m³/h)
  • System static pressure (Pa)
  • Filter efficiency class (HEPA H13-H14 or ULPA U15-U17)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Filter bypass leakage
Cause: Improper gasket seating, seal degradation from chemical exposure, or housing distortion due to thermal cycling or mechanical stress, allowing unfiltered air to bypass the filter media.
Structural integrity loss
Cause: Corrosion from aggressive cleaning agents or environmental contaminants, fatigue from vibration or pressure cycling, or material degradation from UV exposure (if applicable), compromising housing airtightness and strength.
Maintenance Indicators
  • Visible air leakage or dust streaks around housing seams or gaskets during operation
  • Abnormal pressure drop readings across the housing (significantly higher or lower than baseline), indicating bypass or blockage
Engineering Tips
  • Implement regular torque checks on housing fasteners using calibrated tools to maintain proper gasket compression and prevent distortion-induced leaks
  • Establish a cleaning protocol using compatible, non-corrosive agents and validate housing integrity with aerosol or pressure decay testing after maintenance to ensure no bypass paths develop

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 29463: High-efficiency filters and filter media for removing particles in air ANSI/ASHRAE 52.2: Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size DIN EN 1822: High efficiency air filters (EPA, HEPA and ULPA)

Quoted from the published standard.

Manufacturing Precision
  • Frame Squareness: +/-0.5 mm per meter
  • Sealing Surface Flatness: 0.1 mm maximum deviation
Quality Inspection
  • Leak Test (Scanning Method per EN 1822-3)
  • Particle Penetration Efficiency Test (0.3 μm for HEPA, 0.12 μm for ULPA)

Manufacturers of HEPA/ULPA Filter Housing

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Frequently Asked Questions

What materials are available for the HEPA/ULPA filter housing?

The housing can be made of stainless steel (304/316L), galvanized steel, or powder-coated aluminum. The choice depends on the application environment; 316L is recommended for corrosive or high-humidity conditions.

What is the operating pressure range for this housing?

The operating pressure range is 1.0 to 1.6 MPa.

How does the seal type affect performance?

Gel seals provide high integrity and are suitable for critical applications, while gasket seals offer ease of replacement. The choice depends on the required leak-tightness and maintenance frequency.

What is the leakage rate and filter efficiency?

At rated pressure, the leakage rate is ≤0.01% (ISO 29463). Filter efficiency ranges from 99.97% to 99.999% (ISO 29463), covering HEPA to ULPA grades.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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