Vacuum drying oven operation method and precautions
Vacuum dryer operation method
1, items to be dried placed in a vacuum oven, the door box, and purge valve was closed, the vacuum valve open, the power is turned on the vacuum pump starts evacuation, vacuum degree of the inner tank -0.1M Pa, close Vacuum valve, then turn off the vacuum pump power.
2. Turn the vacuum oven power switch to “ONâ€, select the desired set temperature, and the temperature inside the box will start to rise. When the temperature inside the box is close to the set temperature, the heating indicator will light up and go out repeatedly. , generally within 120min can enter the constant temperature state.
3. When the required working temperature is low, a secondary setting method can be used, such as the required temperature of 60 ° C, * can be set to 50 ° C, the temperature overshoot starts to fall back, and the second time is set to 60 ° C. . This can reduce or even eliminate the temperature overshoot phenomenon and enter the constant temperature state as soon as possible.
4, according to the degree of moisture of different items, select different drying times, such as a long drying time, the vacuum degree decreased, the need to restore a degree of vacuum suction again, should open a vacuum pump power, then open the vacuum valve.
5. After the drying is finished, the power of the drying box should be turned off, the venting valve should be opened, the vacuum state inside the box should be released, and then the box door should be opened to take out the items.
Vacuum drying oven precautions
1. The vacuum box housing must be effectively grounded to ensure safe use.
2. When the vacuum box does not need continuous pumping, the vacuum valve should be closed first, then the vacuum pump power supply should be turned off, otherwise the vacuum pump oil should be poured into the box.
3, taken torn article to be treated, such treatment is flammable, must be cooled to a temperature below the ignition point, into the air to avoid oxidation reactions occur to cause combustion.
4. If it is not necessary, please do not open the side door at will to avoid damage to the electrical system.
5. There is no explosion-proof device in the vacuum box, and it is not allowed to put the explosive materials into the dry.
6. This equipment should be equipped with a special air switch.
7. The electrical insulation is intact, and the equipment casing must have reliable protection grounding or protection to zero.
8. Between the vacuum box and the vacuum pump, cross the filter to prevent the wet body from entering the vacuum pump.
9. When using the electric vacuum drying oven, special personnel must be taken care of to ensure the normal operation of the equipment.
10, when removing the articles to be treated, such treatment is flammable, must be cooled to a temperature below the ignition point, into the air to avoid the oxidation reaction cause combustion occurs.
11. The vacuum pump should be replaced with vacuum pump oil frequently.
12. This equipment has no explosion-proof device and should not be placed in explosive materials for drying.
13. An abnormal phenomenon occurs in the electric vacuum drying oven. It should be inspected and repaired in time. If the fault cannot be accurately determined, it must be related to the technical department of the purchasing company.
14, vacuum boxes long-term need to be coated on the plated member neutral grease or petroleum jelly, to prevent corrosion, dust cover and replace the plastic film, the anti-drying chamber to avoid the use of electrical devices damp impact.
15, should be kept clean vacuum box, door glass applications soft cotton cloth, wipe avoid chemical reaction solvents, chemical reactions and to avoid the occurrence of scratch glass.
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