Structured Manufacturing Data (2026)

Sterile Air Filter

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Sterile Air Filter used in the Food Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Sterile Air Filter is characterized by the integration of Filter Cartridge and Housing. In industrial production environments, manufacturers listed on CNFX commonly emphasize PTFE (Polytetrafluoroethylene) membrane construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A filtration device that removes microorganisms and particulates from air entering an aseptic surge tank to maintain sterility.

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Product Specifications

Technical details and manufacturing context for Sterile Air Filter

Definition
A critical component of an aseptic surge tank system, the sterile air filter ensures that the air introduced into the tank for pressure equalization, venting, or product transfer is free from viable microorganisms (bacteria, fungi, spores) and particulate contaminants. It prevents microbial ingress that could compromise the sterility of the tank's contents, which is essential in processes requiring an aseptic environment, such as in food, beverage, or pharmaceutical manufacturing.
Working Principle
Air is forced through a porous filter medium (e.g., PTFE membrane, pleated cartridge) with a defined pore size, typically 0.2 or 0.22 micrometers. This physical barrier traps and retains airborne microorganisms and particles larger than the pore rating, while allowing clean, sterile air to pass through. The filter housing is designed for integrity testing (e.g., bubble point, diffusion test) to verify it has no defects or leaks.
Common Materials
PTFE (Polytetrafluoroethylene) membrane, Polypropylene housing/cage, Silicone or EPDM gaskets
Technical Parameters
  • Filter pore size rating, typically 0.2 μm for sterile filtration (μm) Standard Spec
Components / BOM
  • Filter Cartridge
    The core filtration element containing the pleated membrane media that traps contaminants.
    Material: PTFE membrane, polypropylene support
  • Housing Part
    Stainless steel or polypropylene enclosure that holds the cartridge and provides sanitary connections to the tank.
    Material: 316L stainless steel or polypropylene
  • Gasket/O-ring Part
    Provides a sterile seal between the housing and cartridge, and at connection points.
    Material: Silicone or EPDM

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Sterile Air Filter.

sterile air filter for aseptic surge tank PTFE membrane air filter food manufacturing aseptic tank sterile air filtration system food grade sterile air filter cartridge microorganism removal air filter for food processing

Applied To / Applications

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

Aseptic Surge Tank
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0-10 bar (g)
flow rate: Up to 500 m³/h
temperature: -20°C to 150°C
particle retention: ≥ 99.999% at 0.2 μm
sterility requirement: Log Reduction Value (LRV) ≥ 7 for bacteria, ≥ 4 for viruses
Media Compatibility
✓ Clean steam condensate ✓ Purified water vapor ✓ Sterile nitrogen overlay
Unsuitable: Oil-laden compressed air or corrosive gas streams
Sizing Data Required
  • Maximum air flow rate (m³/h)
  • Required sterility assurance level (SAL)
  • Tank operating pressure (bar)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Filter media degradation
Cause: Exposure to incompatible chemicals or excessive moisture causing delamination, swelling, or chemical attack of filter media, compromising sterility and particle retention.
Seal/gasket failure
Cause: Improper installation torque, thermal cycling, or material incompatibility leading to bypass leakage, allowing unfiltered air to contaminate the sterile system.
Maintenance Indicators
  • Visible particulate matter downstream of filter housing or in sterile air lines
  • Abnormally high pressure drop across filter (>80% of initial clean differential pressure)
Engineering Tips
  • Implement strict moisture control with pre-filtration (coalescing filters) and maintain air dew point below -40°C to prevent microbial growth and media damage
  • Use calibrated torque wrenches for installation and perform regular integrity testing (bubble point or diffusion test) per manufacturer specifications to detect early seal failures

Compliance & Manufacturing Standards

Reference Standards
ISO 14644-1:2015 Cleanrooms and associated controlled environments ASTM F838-15a Standard Test Method for Determining Bacterial Retention of Membrane Filters EN 1822-1:2019 High efficiency air filters (EPA, HEPA and ULPA)
Manufacturing Precision
  • Filter media thickness: +/-0.1mm
  • Frame squareness: 0.5mm per meter
Quality Inspection
  • Integrity Test (DOP/PAO challenge)
  • Particle Count Efficiency Test

Factories Producing Sterile Air Filter

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

How does this sterile air filter maintain sterility in food manufacturing?

The PTFE membrane effectively removes microorganisms and particulates from air entering aseptic surge tanks, preventing contamination and maintaining the sterile environment required for food safety compliance.

What materials are used in this sterile air filter and why?

It features a PTFE membrane for superior microbial filtration, polypropylene housing for chemical resistance and durability, and silicone/EPDM gaskets for reliable sealing in food processing environments.

How often should sterile air filters be replaced in food manufacturing?

Replacement frequency depends on operating conditions and manufacturer recommendations, typically based on pressure drop indicators or scheduled maintenance intervals to ensure continuous sterility protection.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Food Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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