Usage Brief

1.DMHSeries of sterilization ovens with double doors for purification are suitable for manufacturing.MedicineWestphalia bottles, ampoules, aluminum caps, tools, and glassware for sterilization of heat sources and solid material drying in the food and chemical industries.

2.DMHSeries double-door sterilization drying oven, a new generation product developed by our company in recent years. In hundreds of domestic....MedicineAll food companies have passedGMPCertification, the control system of this equipment utilizes imported components, offering precise and sensitive control with stable operation.

3.Touchscreen,PLCOperating System: Japanese or German(Siemens)The internal pressure monitoring within the container uses U.S. (Dewey) instruments.

Principles and Features:

1．DMHSeries of dry heat sterilization ovens, combining the advantages of overseas manufacturing and meticulously designed and developed, catering to domestic and international production needs..MedicineCorporate adoption, compliant with the new versionGMPEU Certification, USAFDACertification manufacturing requirements.

2Dry heat sterilization ovenPLCControl, with manual/Automatic features, touch screen human-machine interface, with dual heating protection function.

3．Temperature can reach350°C, highly efficient and accessibleDOPTest no-load thermal distribution ±3°C, the interior reaches a hundred-grade state.

4The dry heat sterilization oven features a full-welded structure and a polished interior.Ra≦0.4Completely seamless, with no sharp corners.

5．Temperature verification interfaces are provided on the device.DOPTest Interface.

6．DMHA series of products are available for selection, with customizable configurations and dimensions according to the user's application, site, and production needs.

Dry Heat Sterilization Oven Process Description

Ⅰ.Program Initiation and Process Control

1.Preparation Phase (Figure 1)0Dot

2.Ramping Up Phase (Fig. ①)0-1dot

3.Moisture Removal Stage (Fig. ①)0-1•

4.Sterilization Phase (Figure 1)1-2.)

5.Cooling Stage (Fig. 1)2-3dot

6.End Phase (Fig. ①)3-4Point)

Technical Specifications:

Cleanliness Level: The outer dimensions are as listed below:

The working curve of the drying sterilization program is shown as follows:① As shown, the various stages of the process are described as follows:

1. Preparation Phase (Figure 1)0Point)

1.1 Stage Description

During the preparation phase, set the sterilization parameters such as: sterilization temperature250°C, Sterilization Time45min,Alarm temperature value; moisture removal can be set in stages according to the material's humidity, including moisture removal temperature and time. Then, the following conditions must be met to initiate the program.

1Program in automatic state;

2All other programs are in the "Ready" state.;

3Both doors are in the closed position.

4All temperature sensors are functioning normally.

1.2 Alerts within this phase

If there is the aforementioned1.1If the conditions are not met, an alarm will sound and the touchscreen will display an alarm message when the program start button is pressed.

1.3 Termination Conditions at This Stage 

Operators initiateSterilization Phase

2 Warming Phase (Fig. ①)0-1Dot 

2.1 Heating stage description

1Enable automatic button;

2Circulating fan activation

3Heating start-up

4The moisture expulsion valve activates and closes with the rise in temperature.

5Start the recorder and printer until the end stage.

2.2 Alarms within this phase 

Recirculating fan protection alarm, over-temperature alarm, internal cabinet pressure alarm.

2.3 Termination Conditions for This Phase

T1 ≤ Set Value

3 Moisture Removal Phase (Figure 1)0-1.)

3.1 Moisture Removal Stage Description

1Circulating fan startup.

2Heating start-up

3Dew-point control5Section, moisture-removing valves automatically open and close based on the solidification time intervals.

4Recorder and printer boot up.

3.2 Alarm during this phase

Recirculating fan protection alarm, over-temperature alarm, internal pressure alarm in the box.

3.3 Termination Conditions for This Phase

T1 ≥ Set Value

4 Sterilization stage (Figure ①)1-2Point)

4.1 Sterilization stage description

1Circulating fan startup.

2Heating start-up

3Heating tube according to temperature controllerPIDAdjustable auto-on and auto-off functionality

4Recorder and printer boot up.

4.2 Alerts within this phase

Recirculating fan protection alarm, over-temperature alarm, internal box pressure alarm. 

4.3 End Condition of This Phase

Sterilization time has reached the set value.≥45min）

4.4 Note

Sterilization Temperature Setting250°C, during the sterilization stage, the sterilization temperature is controlled by the recirculating air within the inner chamber.250℃-251Between 0℃ and 100℃.

5 Cooling phase (Fig. ①)2-3).

5.1 Cooling stage description

1Circulating fan activation.

2Heating stopped.

3Cooling fan activation; 

4Moisture-removing fan activation

5Moisture expulsion valve activated.

6Recorder and printer activated.

5.2 Alerts during this phase

Recirculating fan protection alarm, internal cabinet pressure alarm

5.3 Termination conditions for this phase

T1≤60℃

6 End Phase (Fig. ①)3-4(Chinese dot)

6.1 End Stage Description

1Additional fan startup

2Interior pressure ≥20Pa;

3Recorder and printer stopped.

4The printed report should include the following content;

a) Real-time printing of production batches;

b) Heating, sterilization, and cooling processes.

c) Cabinet pressure differential data

d) FHValue;

5Prompt: Program execution has ended.

 Test results: Pass or fail.