The Us Code of Federal Regulations

1. The sterilization autoclave must have a mercury-in-glass thermometer with divisions easily readable to 1°F  and a temperature range not to exceed 17 °F per inch of graduated scale.
2. Thus, to insure accurate autoclave sterilization temperature reading the MIG thermometer must be checked for accuracy once a year against a known accurate standard thermometer upon installation and at least once a year thereafter.
3. The date of the test should be placed on the MIG thermometer so that the operator can readily see when the next check for accuracy is to be made. Checks for accuracy should be done at the approximate scheduled autoclave sterilization temperature.
4. The date and name of the individual testing thermometers should be logged and filed.
5. Resistance thermometer (RTD) devices are generally used as the reference thermometer for programmable controlling systems. In no case will the RTD replace the MIG as the reference thermometer for the sterilization autoclave
6. The recording temperature device should have graduations no to exceed 2°F (1 ℃) within range of 10°F (5.5 ℃) of processing temperature. The temperature should agree as nearly as possible, with the known accurate mercury-in-glass thermometer

     Physics theory

1. Thermodynamic equilibrium: Steam and saturate water phase equilibrium, liquid phase and steam phase balance system
2. The zeroth law of thermodynamics : Thermal equilibrium; multi-material temperature balance system

     Mechanical principle

1. Steel thermal transfer conductivity : 54 Kcl/(hr)(m²)(℃)
2. Steam to saturate water thermal transfer conductivity : 5,000 ~ 10,000 Kcl/(hr)(m²)(℃)
3. Heat exchanger was heat conductivity transfer system, water steam spray system was direct thermal transfer system
4. Thermal transfer area : Small water drop would expand the thermal transfer area to very large
5. A few circulation water could be doing the thermal translation function
6. Close equilibrium cycle system for cooling process, its very save for food and pharmacy sterilizing process

Before sterilizing process

1. Hot filling sterilizing process: should be pre-heating , the temperature was same as products hot filling temperature, then the product push into the autoclave chamber
2. Glass bottles: hot filling glass bottles need preheating before start sterilizing process, because the temperature differential between glass bottles and room temperature too large , the glass container would crack
3. The working medium should be soft water (its same as steam generator supply water)

Prepare sterilization process:

1. Maker setting: at initial in the autoclave chamber is dry, when process is done, all circulation water was automatically exhaust out of chamber
2. Stand by: maker setting automatically shut down all control system and mechanical system except power
3. Products package can't broken, should be good arrangement of bottles or flexible pouches package, its necessary for good sterilizing process

Starting food sterilization process: (One Touch start)

1. Clean soft water inlet to the sterilization autoclave chamber, its automatically control by level switch
2. Automatically start circulation pump, automatically steam inject into sterilizer chamber, compress air inlet to autoclave sterilization for over pressure balance system
3. Start heating process, temperature rise up speed could be adjust between 3~15℃/min ( 5~27°F/min)

Sterilization autoclave heating process:

1. Circulation water inject into the autoclave chamber from top and site, the injection nozzle spray the circulation water to "water droplets"
2. Millions of droplets be heating immediately in the space of autoclave chamber
3. Uniform distribution of temperature, the nozzle's injection force drive the droplets to everywhere in the chamber  

Sterilization temperature keeping process :

1. Temperature reaches the set point temperature, starting sterilization process
2. The average temperature precision keep in ±0.5°C (±1.0°F) during the process
3. Sterilizing process approach to constant temperature and constant pressure physical equilibrium circulation
4. Saturate water sterilization process never over heating the products, best remain protein and glucose, excellence mouth feeling
5. Option equipment: sterilization F value recorder

Sterilization process finish :

1. Time reaches the set time, (F value been sufficient), sterilizing process is finish
2. Automatically shut down the steam, and automatically starting the cooling system
3. Hot circulation water would be cooling by the heat exchanger, the cold circulation water inject into the sterilization autoclave chamber to cooled the product
4. Cooling speed could be adjust between 5~15℃/min ( 9~27°F/min)

Autoclave sterilizer cooling process :

1. Hot circulation water cooled by heat exchanger, the cold water inject into the autoclave chamber, the cold liquid water with nozzle spray its to " water droplets", cold droplets "pull out" the thermal from products, the products should be cooling
2. With close circulation system, the asepsis circulation is the best for cooling process, the working medium ( water) had been fully sterilizing, its clean and asepsis
3. With close cooling system save a lot of cooling water, only need about 3-7% cooling water of full water immersion autoclave sterilization,

Working process finish :

1. Final cooling temperature is higher then the temperature of environment,  average higher 15℃( 27°F), the products temperature would between 30~45℃ ( 85 ~ 115°F), for special propose, you can set the final cooling temperature more higher, but never over 60℃ ( 140 °F), because after cooking were keeping cooking the product, final high cooling temperature would damage your products, its cause over cooking
2. Cooling speed too slowly or sterilization time too long or final temperature too high, all will damage your products, its loss a lot of nutrition
3. Super cooling : Its option function; products cooling temperature between 10℃ ~ 30℃ ( 50 ~ 85°F)