HEPA Filter Unit for Sterile Environments | Specifications & Verification

Product Specifications

Technical details and manufacturing context for HEPA Filter Unit

Definition

A HEPA (High-Efficiency Particulate Air) Filter Unit is a critical component of Sterile Air/Hood Enclosure systems, designed to capture and retain at least 99.97% of airborne particles 0.3 microns in diameter or larger. It ensures the delivery of contaminant-free air to sterile work zones, protecting sensitive processes and products from particulate contamination. The unit typically consists of a glass fiber filter media, an aluminum or galvanized steel frame, polyurethane or silicone sealant, and polypropylene or aluminum separators. It is available in various configurations with airflow capacities ranging from 500 to 2000 m³/h, filtration efficiencies of 99.97% to 99.99% (at 0.3 µm MPPS, HEPA H13–H14 grade per EN 1822), and initial pressure drops of 150 to 250 Pa. Operating parameters include a maximum temperature of 60–80 °C, maximum humidity of 80–95% RH (non-condensing), and operating voltage of 220–240 V AC (single phase, 50/60 Hz). Power consumption ranges from 100 to 500 W, and noise levels from 45 to 65 dB(A) at 1 m distance. The filter frame material is typically stainless steel (304–316), and sealing gaskets are made of EPDM or silicone. Units weigh between 15 and 60 kg, with standard dimensions ranging from 610×610×292 mm to 915×915×292 mm (W×H×D). These values are reference ranges and must be verified for the specific model and application. The unit operates by forcing air through a dense, pleated filter media composed of fine glass fibers arranged in a random web. Particles are captured through interception, impaction, and diffusion mechanisms, allowing clean air to pass while trapping contaminants. This product is listed in a neutral directory; it is not manufactured or sold by the directory. Always confirm model-specific specifications and compliance with relevant standards (e.g., ISO 14644, EN 1822, IEC 60038, ISO 3744, ASTM A240) with the legal manufacturer or supplier before procurement.

Working Principle

Air is forced through a dense, pleated filter media composed of fine glass fibers arranged in a random web. Particles are captured through a combination of interception, impaction, and diffusion mechanisms, allowing clean air to pass through while trapping contaminants within the filter matrix. The filter media is supported by a frame and sealed to prevent bypass. As air flows through, larger particles are trapped by impaction, mid-size particles by interception, and smaller particles by diffusion. The efficiency of the filter depends on the fiber density and thickness, as well as the airflow rate. Over time, captured particles accumulate, increasing pressure drop and reducing airflow, indicating the need for filter replacement or maintenance.

Common Materials

Glass fiber filter media, Aluminum or galvanized steel frame, Polyurethane or silicone sealant, Polypropylene or aluminum separator

Technical Parameters

Parameter	Typical range	Notes & selection driver
Airflow Capacity	500–2000 m³/h	Select based on room volume and required air changes.ISO 14644
Filtration Efficiency	99.97–99.99 %	At 0.3 µm MPPS; HEPA H13–H14 grade.EN 1822
Initial Pressure Drop	150–250 Pa	At rated airflow; increases with loading.EN 1822
Max Operating Temperature	60–80 °C	Continuous operation; higher temps may degrade media.
Max Operating Humidity	80–95 % RH	Non-condensing; avoid moisture for filter integrity.
Operating Voltage	220–240 V AC	Single phase, 50/60 Hz.IEC 60038
Power Consumption	100–500 W	Depends on fan motor and airflow.
Noise Level	45–65 dB(A)	At 1 m distance; lower for cleanroom comfort.ISO 3744
Filter Frame Material	304–316 SS	Stainless steel for corrosion resistance.ASTM A240
Sealing Gasket Material	EPDM–Silicone	Temperature and chemical compatibility.
Weight	15–60 kg	Varies with size and construction.
Dimensions (W×H×D)	610×610×292–915×915×292 mm	Standard sizes; custom available.

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 Media Part
Primary filtration element that captures particulate contaminants

Material: Glass fiber paper
Frame Part
Structural support and sealing surface for the filter media

Material: Aluminum or galvanized steel
Separator Part
Maintains pleat spacing and structural integrity of filter media

Material: Aluminum or polypropylene
Sealant Part
Creates airtight seal between filter media and frame

Material: Polyurethane or silicone
Gasket Part
Provides leak-proof seal between filter unit and housing

Material: Neoprene or closed-cell foam

Applied To / Applications

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

Sterile Air/Hood Enclosure

View system integration details

Manufacturers of HEPA Filter Unit

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Frequently Asked Questions

What is the filtration efficiency of this HEPA filter unit?

The filtration efficiency is at least 99.97% for particles 0.3 microns in diameter or larger, with HEPA H13–H14 grade per EN 1822. The exact efficiency for a specific model should be confirmed with the manufacturer.

What are the typical operating conditions?

The unit operates at temperatures up to 60–80 °C and humidity up to 80–95% RH (non-condensing). Operating voltage is 220–240 V AC, single phase, 50/60 Hz. Always verify these parameters for your specific model.

How do I know when to replace the filter?

Monitor the pressure drop across the filter. An increase beyond the initial pressure drop (150–250 Pa) indicates loading. When the pressure drop reaches the manufacturer's recommended limit, the filter should be replaced to maintain airflow and efficiency.

What standards apply to this product?

Relevant standards include ISO 14644 for cleanroom air cleanliness, EN 1822 for HEPA filter classification, IEC 60038 for voltage, ISO 3744 for noise measurement, and ASTM A240 for stainless steel. Compliance should be verified with the supplier.

Data Basis

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

Preliminary Technical Classification

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pressure:	Max 1.0 bar differential pressure
flow rate:	0.1 to 2.0 m³/min per filter
temperature:	-20°C to 80°C
particle retention:	≥99.97% at 0.3 μm

HEPA Filter Unit

Product Specifications

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