ESTEEM ETO STERILIZER:
STRUCTURE PRINCIPLE OF ETO STERILIZERS :-
"Ethylene oxide sterilizer" is defined as equipment which uses ethylene oxide as a biocide to
destroy bacteria, viruses, fungus and other unwanted organisms. Ethylene oxide is used in
sterilization of items that are heat and moisture sensitive. E.T.O consists of a closed chamber
mostly double jacketed, corrosion resistance, gas resistant of suitable alloy (mainly mild steel).
The middle jacket is surrounded with the hot water to raise the temperature of the product. The
outer jacket of ethylene oxide sterilizer is insulated with proper insulation material for heat
resistant. This E.O. gas sterilizer equipment is provided with vacuum pump, pressure gauges,
temperature gauges, and nozzle connection for hot & cold water. It consists of one door which is
made with radial locking arrangement in order to make chamber close tight.
APPLICATIONS OF ETO STERILIZERS:
In hydration plants (where onion powder, onion flakes, garlic powder, garlic flakes).
Products are manufactured and exported.
In plywood industries where ply woods are sterilized against white ants and residual bacteria.
In food industries where various seeds like sesame seeds are sterilized and exported. Wheat
flour, grains, all types of spices etc.
In pharmaceutical products, hospitals.
Used in industries where all the food products are exported.
Used for sterilization of catheters IV.
OUTSTANDING FEATURES OF ETO STERILIZERS
Compact design to suit all environmental conditions.
Internal cage provided for none sticking of bags inside the chamber.
Provided with HMI screen complete PLC controlled.
Provided with thermal printer
Door is provided with joint less food grade gasket.
WORKING OF ETO GAS STERILIZER :-
1. PRE STERILIZATION CYCLE: - This process begins with the end cycle of previous batch,
when sterilization gets complete and complete eto gas is removed from the chamber through
vacuum pump. Aeration cycle process is carried out by drawing fresh air inside the chamber
until the pressure inside the chamber becomes atmospheric. The door is opened, sterilized
material is taken out and new batch is started. The material to be sterilized is fed into the ETO
chamber before making a radial lock.
2. VACCUME CYCLE: - Vacuum is done in two stages. 1) After feeding material into the chamber,
the chamber inside is vacuumed to 250 to 300 mm of HG. Air is removed completed and Air
nozzle vent is closed. 2) After sterilization is complete to remove ETO gas from the chamber.
3. STERILIZATION CYCLE: - E.T.O gas is fed inside the chamber in appropriate proportion and
simultaneously hot water is supplied in the jacket. This water inside the jacket is maintained at
80 C. The gas inside the chamber goes under thermal process thus increasing the pressure
inside the chamber. When the pressure approaches the desired value i.e. (1.5 kg/cm2 or 14.7 k
pas), this pressure and allowable temperature is maintain for specific time (5 To 7 or 8 to 10
hours) depends upon the material to be sterilize.
4. AERATION CYCLE: - This process involves extracting residual gas out of the sterilized
material followed after vacuum cycle. The air vent nozzle is kept open. The fresh air is allowed to
pass inside the chamber until it attains atmospheric.
We at Esteem Industries Inc. have manufactured different size of eto gas sterilizer and utmost
care has been taken during its manufacturing stages. Our eto gas sterilizer undergoes different
test (hydro test, vacuum test, pressure test) before it is finally dispatched to our consumers.
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ESTEEM INDUSTRIES INC.
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