Sterile Air Purge for Bottle Sterilizers | Food Manufacturing Component

Product Specifications

Technical details and manufacturing context for Sterile Air Purge

Definition

The Sterile Air Purge is a critical subsystem within bottle sterilizers (such as hydrogen peroxide rinsers) that follows the chemical sterilization stage. It uses HEPA-filtered sterile air to forcibly displace residual hydrogen peroxide solution, vapor, and moisture from bottle interiors and exteriors, ensuring complete drying and preventing chemical carryover into subsequent filling operations. This process maintains sterility while preparing containers for aseptic filling. The purge unit is typically constructed from stainless steel 316L with PTFE seals and gaskets, and silicone tubing for flexible connections. It operates within a pressure range of 1.0–1.6 MPa, with a sterile air flow rate of 50–200 L/min. The filtration rating is 0.01–0.2 µm (ISO 8573-1), ensuring removal of particulates and microorganisms. Operating temperature is 4–60°C, above which seal degradation may occur. Connection sizes range from DN25 to DN50 (ISO 1127), and the unit weighs between 2.5 and 5.0 kg depending on configuration. Surface finish is ≤0.8 µm Ra (ISO 4287) for cleanability. Seal material is EPDM, compliant with FDA 21 CFR 177.2600 for food contact. The purge cycle is timed and monitored to achieve specified dryness levels, and the system is designed for integration with CIP/SIP processes. Verification of model-specific values and standards with the legal manufacturer or supplier is essential before procurement.

Working Principle

Sterile air is generated by passing compressed air through high-efficiency particulate air (HEPA) filters (typically 0.2-0.3 μm) to remove microorganisms. This filtered air is then directed through nozzles into the sterilization chamber at controlled pressure and flow rates. The air stream creates turbulent flow within bottles, evaporating residual liquid sterilant and carrying vapors out through exhaust systems. The purge cycle is timed and monitored to achieve specified dryness levels.

Common Materials

Stainless steel 316L, PTFE (seals/gaskets), HEPA filter media, Silicone tubing

Technical Parameters

Parameter	Typical range	Notes & selection driver
Operating Pressure	1.0–1.6 MPa
Sterile Air Flow Rate	50–200 L/min	Ensure sufficient purge velocity for complete removal
Filtration Rating	0.01–0.2 µm	Class 1 or better for particulate removalISO 8573-1
Operating Temperature	4–60 °C	Above 60°C may degrade seals
Material	316L	Corrosion-resistant for CIP/SIPASTM A240
Connection Size	DN25–DN50	Match bottle filler inletISO 1127
Seal Material	EPDM	Food-grade and sterilizableFDA 21 CFR 177.2600
Surface Finish	≤0.8 µm Ra	Smooth for cleanabilityISO 4287
Weight	2.5–5.0 kg	Varies with connection size

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

HEPA Filter Housing
Contains and seals HEPA filter elements for sterile air generation

Material: Stainless steel 316L
Air Distribution Manifold
Distributes sterile air evenly to multiple purge nozzles

Material: Stainless steel 316L
Purge Nozzles Part
Direct sterile air stream into bottle openings for effective cleaning

Material: Stainless steel 316L
Pressure Regulator
Maintains consistent air pressure during purge cycle

Material: Stainless steel with PTFE seals
HEPA Filter Elements
The 0.2–0.3 μm media that actually removes the microorganisms; the housing only holds it.

Applied To / Applications

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

Bottle Sterilizer

View system integration details

Manufacturers of Sterile Air Purge

Manufacturer profiles associated with Sterile Air Purge.

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Frequently Asked Questions

What is the operating pressure range for the Sterile Air Purge?

The operating pressure range is 1.0–1.6 MPa. Always verify the exact pressure requirements for your specific model with the manufacturer.

What filtration rating is used in the Sterile Air Purge?

The filtration rating is 0.01–0.2 µm, according to ISO 8573-1, which ensures removal of particulates and microorganisms. This is critical for maintaining sterility during the purge process.

What materials are used in the construction of the Sterile Air Purge?

The unit is typically made of stainless steel 316L (ASTM A240) for corrosion resistance, with PTFE seals and gaskets, and silicone tubing. The seal material is EPDM, compliant with FDA 21 CFR 177.2600 for food contact.

What is the operating temperature limit for the Sterile Air Purge?

The operating temperature range is 4–60°C. Above 60°C, seals may degrade, so it is important to maintain the temperature within this range to ensure reliable performance.

Data Basis

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

Preliminary Technical Classification

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pressure:	0.5 to 2.0 bar (7 to 29 psi)
flow rate:	10 to 100 L/min (0.35 to 3.5 CFM)
temperature:	Ambient to 60°C (140°F)
moisture removal capacity:	Up to 95% relative humidity reduction
sterilant residual tolerance:	Up to 1000 ppm initial concentration

Sterile Air Purge

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards