Industrial Ethylene Oxide Sterilizer

Common applications include medical devices such as syringes, catheters, heart stents, surgical kits, and flexible endoscopes; pharmaceutical packaging and components; sterile food packaging and spices; textiles; and other heat-sensitive materials like hypodermic syringes, infusion sets, surgical dressing packs, protective gloves, urinary bags, and contraceptives.

The cycle generally includes three phases: Conditioning (pre-moisturization at ~70% relative humidity and 55°C for about 12 hours); Gas Exposure (vacuum creation followed by EO injection for 4–8 hours while maintaining humidity and temperature); and Evacuation/Aeration (continuous vacuum and fresh-air flushing for 8–12 hours to remove residual EO gas).

Models include AETOS-2.6 (2.6 cu. ft. / 70 liters, 40g cartridge), AETOS-4.5 (4.5 cu. ft. / 125 liters, 100g cartridge), and AETOS-8 (8 cu. ft. / 200 liters, 170g cartridge). They support warm and cold cycles, feature in-built aeration, require compressed air (100 psig), and run on 220V single-phase power (with adjustable voltage options). Chamber sizes and power ratings vary by model.

Internal components and product-contact surfaces are fabricated from premium-grade stainless steel (SS 304 and SS 316). The design uses a sectional, modular framework for flexibility and scalability, with a single-access door and heavy-duty outer enclosure housing a high-capacity venturi system.

Because EO is flammable, potentially explosive, and a potential carcinogen, systems include explosion-proof chamber designs and electrical systems, real-time gas detection sensors with alarms, automated controlled aeration cycles, negative-pressure rooms, emission control (e.g., catalytic oxidation), leak detection, emergency shutdown protocols, flame-proof construction, multiple vacuum pumps, and explosion vents. Many modern units use 50–90% less EO than older models.

They adhere to ISO 11135 (requirements for development, validation, and routine control of EO sterilization processes for health-care products) and U.S. FDA guidelines. Facilities also comply with EPA regulations on EO emissions. Complete qualification services (IQ, OQ, DQ) are available, and systems support a Sterility Assurance Level (SAL) of 10⁻⁶, often validated with biological indicators.

They serve the pharmaceutical, nutraceutical, herbal, Ayurvedic, biotech, cosmetic, and chemical industries, as well as high-volume manufacturing and contract sterilization facilities for medical devices and related products.

It enables reliable sterilization of heat- and moisture-sensitive items without degradation, offers excellent penetration through packaging and complex geometries, supports high-volume bulk processing (including pallet-based loading in larger systems), provides modular scalability, simplified controls for ease of use, and integrated aeration. It remains essential for modern healthcare supply chains where steam or other high-temperature methods are unsuitable.

Residual EO is removed during the aeration phase through continuous vacuum cycles and fresh-air flushing (typically 8–12 hours). Modern systems incorporate effluent treatment such as catalytic oxidation to reduce emissions, support reduced-EO usage cycles, and may offer hybrid or alternative low-temperature options. Operators follow strict protocols to minimize worker and environmental exposure while maintaining compliance.