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EtO sterilization solution buy in Hangzhou
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EtO sterilization solution

EtO sterilization solution

Code: HDXCE-03
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China, Hangzhou
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Less than 1 year old on Allbiz
Technical characteristics
  • BrandHangzhou Unique
  • Country of manufactureChina


Introduction of EtO Sterilization


Ethylene Oxide (EtO) sterilization is mainly used to sterilize medical and pharmaceutical products that cannot support conventional high temperature steam sterilization - such as devices that incorporate electronic components, plastic packaging or plastic containers.

EtO gas infiltrates packages as well as products themselves to kill micro organisms that are left during production or packaging processes. This gas, mixed with air at a ratio of at least 3% EtO gas, forms an explosive mixture. Pure EtO gas boiling point is 10.73 ºC at atmospheric pressure. Most of the time, it is mixed with Nitrogen or CO2. This explosive condition requires Intrinsic Safe material (ATEX) zoning, for security of people as well as security of the process itself.

Safety of personnel is an important issue due to the harmful effect of EtO on humans. Polluted areas need to be alarmed using gas detectors set up at different locations to monitor any leak. Visual and audio alarm systems need to be provided. The system must inform any operator when a sterilization cell contains EtO.

When this toxic gas is removed from the room it needs to be treated using thermal burners, scrubbers or oxidation for environmental protection or be transported to an alternate facility for treatment.


Sterilization Cycle


 There are at least three stages in a typical EtO sterilization cycle:

l  Preconditioning

l  Sterilization

l  Aeration (Degassing)


Preconditioning prepares the chamber environment to meet the ideal conditions for temperature, pressure and humidity. First air is removed from the chamber to allow for gas penetration. A leakage test is performed, to ensure that staff and environment are safe. Next, some steam is injected into the chamber and humidifies the load, since EtO is only effective in a humid environment. The chamber is heated by either steam or hot water which is present in the jacket. Normally the jacket is kept at the same temperature 24/7 to minimize temperature fluctuations.


The second stage is the actual sterilization process. The EtO enters the chamber via evaporation with a certain amount of steam to keep the humidity level up as well as to make sure the EtO is reaching all parts of the load. When the required concentration in the chamber and load is achieved the actual sterilization stage starts. The lower the gas concentration in the chamber the longer is the sterilization time.  As EtO is absorbed by many kinds of plastic materials it is important to keep the concentration at the right level. To achieve this EtO is sometimes added to the chamber after a while. It is of major importance to ensure the appropriate concentration level of EtO in the chamber to achieve effective and safe sterilization.

Aeration (Degassing)

Aeration is the most important and longest part of the EtO sterilization cycle. As mentioned, materials such as plastics and rubbers absorb gas and if applied to patients, the toxic gas could damage their body tissue! For this reason it is very important to have an excessive aeration stage to remove any remaining EtO gas and to allow absorbed gas to evaporate again from the sterilized items. This is done by circulating HEPA filtered air over the load at a temperature of 30°C to 50°C. This is sometimes done in the sterilizer’s chamber, but sometimes the sterilized items are placed in a special aeration cabinet. If the sterilized items are repositioned from the chamber to the aeration cabinet then strict safety precautions should be in place to prevent EtO gas exposure to the people who perform this function.  A commonly used time period for this aeration treatment is 48 hours which results in a very slow instrument turnaround. A special infrastructure is required, with gas tight ventilation piping to the roof top or to a catalyzer. The sterilizer cannot use the hospital's ventilation system because it is too dangerous. The special ventilation piping has to be tested for gas leaks all the way as this is the only way to minimize the risks.


Technical Specifications


Volume of inner container

1,3,6,10,15,20,25 M ^ 3

Material of case body

Stainless steel or high- quality carbon steel

Sterilizing temperature


Sterilizing pressure

-85~ + 80 kPa

Sterilizing humidity

30~100 %RH

Sterilizing concentration

300~1000 mg / L

Sterilizing time

3~12 hrs


-85 Kpa

Times of aeration


Max electrical heating power

9~60 KW

Max steam heating power

3~10 KW

Power source

3-phase, 5-wire/ 380V 50Hz


Package and Shipment


● Package details: Wooden crate pallet plus foam board and bubble film, Full closed wooden case. 1pcs/each package (for stationary EtO sterilizer);

● Transportations: sea transport, rail transport, air transport, road transport, LCL/ FCL container transport or as requested;

● Trade terms: FOB, CFR, CIF and EXW, DDP, etc.

● Delivery time: in 60 days after receiving deposit (customized machines not included).


Company profile


Hangzhou Unique Disinfection Equipment Co., Ltd., located in Hangzhou, is a sterilizer manufacturing company with rich experience in sterilization processes for pharmaceutical, medical device, hospital, cosmetic, and food sterilization. Unique Company is one of the most reputed companies in the field of sterilizer manufacturing for Medical Devices. Working closely with our customers, with understanding and meeting their requirements, we are providing to improve and introduce innovative designs.


Unique Company has provided high quality products in China. Moreover our products are available in the global market at optimum prices without compromising on the excellent quality, which has fuelled our growth. We have a well trained team of expert technicians and qualified engineers that helps our organization meet stringent quality control norms and varied and specific client requirements. With the hard work and effort of our dedicated staff, we have built and supplied high-quality sterilization equipment and have got good references from our happy customers. We are constantly improving existing products and introducing innovative designs at all times.


Honor certificates





Hangzhou Unique Disinfection Equipment Co., Ltd.

Add: No. 220, Zhangshan Road, Renhe Street, Yuhang District, Hangzhou

Email: sales@unqxd.com

Website: www.unqxd.com

Tel: 86-571-88781298

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