Food Grade ETO Sterilizer

It is commonly used for spices, herbs, dried fruits, seasonings, gums, starches, nutmeats, dehydrated vegetables, and food packaging materials. These items benefit from deep gas penetration into porous loads without damage from heat or moisture.

ETO sterilization works at low temperatures (around 50°C) in a dry process, making it ideal for products that cannot tolerate high heat or moisture. It preserves the natural flavor, color, aroma, and nutritional value while effectively reducing microbial load and extending shelf life.

A typical complete cycle averages about 8 hours, though the full process (including pre-conditioning, sterilization, and aeration) can range from 4 to 12 hours depending on load size and product complexity. The gas exposure phase itself usually lasts 1–6 hours.

The process occurs in a sealed chamber and includes three stages:

• Pre-conditioning – Items are humidified and heated to optimize gas penetration.
• Sterilization – ETO gas (typically 400–1000 mg/L) is introduced under controlled conditions to kill microbes.
• Aeration – Residual gas is removed by purging and heating to ensure the product is safe, as ETO is toxic and flammable if not fully dissipated.

All product-contact surfaces and internal components are made from high-grade stainless steel (SS 304 or SS 316/316L) to ensure hygiene, corrosion resistance, and compliance with food-safety requirements, preventing any contamination of edible goods.

Systems are offered in two configurations:

• Semi-automatic models controlled by hard-wired analog push buttons and air-operated ball valves.
• Fully automatic PLC-HMI systems with programmable logic controllers and interactive touchscreen interfaces for unattended, automated cycle management.

Food Grade ETO Sterilizers are manufactured in modular designs ranging from compact 0.5-cubic-meter units up to large 40-cubic-meter systems. Example models include AETOS-2.6 (≈70 liters), AETOS-4.5 (≈125 liters), and AETOS-8 (≈200 liters), with corresponding sterilant gas cartridge sizes.

Key features include multiple pressure-relief systems, door interlocks, alarms, in-built aeration, and construction to international standards (such as ISO, CE, and ASME). Optional IQ, OQ, and DQ qualification documentation is available on request.

Benefits include superior capacity for larger loads, enhanced safety systems, reliable microbial reduction while protecting product integrity, user-friendly automated operation, modular flexibility for different facility sizes, and the ability to maintain product quality attributes that heat- or moisture-based methods would compromise.