Nine Components of Isolation Glove Box

1. Chamber (isolate the body of of the glove box)


2. Antechamber door or transition compartment (isolate the port of the glove box)


3. Cabinet lighting (isolate the nerves of the glove box)


4. Window (isolate the eyes of the glove box)


5. Glove operation port (isolate the arm of the glove box)


6. Move the bottom frame (isolate the thigh of the glove box)


7. Power socket in the box (isolate the brain of the glove box)


8. Box filter, box breathing valve (isolation of the breathing system of the glove box)


9. Negative pressure fan (mostly used for gas isolation) (isolate the lungs of the glove box)

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Which Points Should be Paid Special Attention to When Using the Glove Box?

1) After operating the glove box, fill in the operation record in time, including "the user, the water and oxygen value, and what operation to do".

2) When replacing the gas cylinder in the glove box, the pressure is set to the default value ±4mbar.

3) The daily work pressure is set according to the operating comfort. When not in use for a long time, the pressure is set to 1-6mbar.

4) Regularly check the wear of gloves, check the vacuum pump oil level (between the upper and lower marks), and increase the pump oil appropriately.

5) Clean the water probe once every 2 to 3 months to ensure accurate detection. (Also refer to the actual situation of the environment in different user boxes)

6) If you often use organic solvents in your glove box, it is recommended that you replace the organic solvent adsorption materials regularly, not more than one year at the latest.

7) Replace the filter element regularly, no more than two years at the latest.

8) Decide to replace the vacuum pump oil cycle according to the actual situation of your glove box. For example, the pump oil turns black or yellow, there is water in the pump oil or there are more organic solvents. The oil replacement cycle should not exceed 2 years at the latest.

9) If a lot of organic solvents are inevitably exposed during the experiment, the cycle needs to be stopped to do the experiment. After the experiment is completed, clean it first, and then start the cycle.

10) When the environment in the box is poisonous or harmful, the exhaust port of the vacuum pump, the exhaust port of the air blower and the exhaust port of the cleaning valve must be exhausted to the outdoors with an exhaust pipe (exhaust gas treatment is required if it is not allowed to be exhausted outdoors).

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What is the Function of the Glove Box?


1. Closed circulation: The vacuum glove box and the gas purification system form a closed circulation system, and the gas purification system provides gas circulation power.


2. Man-machine dialogue: equipped with color touch screen, English interface, realize man-machine dialogue, convenient operation


3. Automatic control (the system is controlled by the integration of the color touch screen man-machine interface and the PLC program control system)


Realization function: manual/automatic control chamber pressure;


Manual/automatic control of the purification status of the gas purification system;


Automatically control the reduction process of the gas purification system;


Manual/automatic purification system reduction, purification and conversion purification column (when equipped with dual purification columns);


Automatic chamber atmosphere alarm;


Setting of atmosphere and pressure parameters in the box and manual/automatic conversion;


Parameter setting of automatic control function of gas purification system;


Check system history;


Working condition detection of the actuator of the gas purification system;


The operation error and warning prompt of the program control system.

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What is a Glove Box?

The glove box referred to here is a fully enclosed chamber that completely isolates the environment inside and outside the chamber. One side of the chamber is equipped with a window and gloves. The operator uses the gloves to manipulate the materials in the cavity.


The glove box has many uses. 1) When operating toxic and hazardous materials, the glove box can protect the operator and the environment; 2) When the atmospheric environment materials such as bacteria and dust will contaminate the material, the glove box can be used as an isolation box. The material outside the body protects the material in the box from pollution; 3) When air interacts with the material and affects the performance of the material, the glove box can be filled with inert gas. The box is used to isolate the air outside the box and protect the material in the box. The material is protected from airborne gases such as H2O, oxygen, and sometimes even nitrogen. The last device is called an inert gas glove box, which provides an inert gas environment for the materials to be handled.


There are three types of inert gas glove boxes:


A) Vacuum glove box: Before operation, vacuum the entire box body to completely remove the air in the box body, and then fill it with high-purity gas for use. Advantages: cheap equipment. Disadvantages: The content of H2O and oxygen impurities is high, usually above 100PPM.


B) Cleaning the glove box: The glove box is continuously vented with nitrogen, and the gas impurities leaking into the glove box are continuously cleaned out of the glove box. Advantages: cheap equipment. Disadvantages: high operating costs, a large amount of inert gas needs to be consumed. The content of H2O and oxygen impurities is usually above 10PPM.


C) Circulating glove box: The glove box is equipped with gas purification gas, and the gas in the glove box continuously circulates through the gas purification system to remove H2O, oxygen and organic solvent impurities. Advantages: low operating cost, low H2O and oxygen content, usually less than 1PPM; including PLC and touch screen, multiple functions. Disadvantages: higher equipment prices.


Here, the above third inert gas circulation glove box is referred to as glove box.

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What are the Uses of the Vacuum Glove Box?

We know that in the process of scientific experiments, some substances are easily oxidized and deliquescent in the atmosphere, which makes the chemical reaction of the experimental substances and the pre-processing of the samples very difficult, which affects the experimental process and test results. The vacuumglove box (also known as Vacuum inert gas operation box) effectively handles these problems. The device can safely put in and take out the experimental samples, and operate, react and test freely in the absence of oxygen and water, ensuring the normal progress of scientific experiments . This product is an ideal device for scientific experiments in universities, research institutes, and enterprise laboratories, and is widely used in biochemistry, metallurgy, electronics, chemicals, geology, minerals, medicine and other parts.

Such as: lithium ion batteries and materials, semiconductors, super capacitors, special lamps, laser welding, brazing, material composition, OLED, MOCVD, etc. It also includes biological applications, such as anaerobic bacteria culture, cell hypoxia culture, etc.

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How to Solve the Malfunction of The Glove Box?

1. The main and mini antechamber cannot replenish air

Reason: The air holes in the glove box leading to the main and mini antechamber may be blocked by plastic film, etc.; Whether the solenoid valve is not opened.


Method: Confirm the position of the air hole according to the direction of the pipeline, and clear the pipeline; Check the wiring and solenoid valve.


2. The main and mini antechamber cannot be pumped


Reasons: The air extraction holes in the main and mini antechamber are blocked by plastic film, etc. or the chamber door leaks; The antechamber door is not closed tightly, or the sealing ring of the main and mini antechamber is loose.


Method: According to the direction of the pipeline, confirm the position of the air hole and dredge the pipeline; Close the antechamber door and check the size of the sealing ring; Check whether the operating air pressure is too low (because the main antechamber air valve is a pneumatic valve).


3. The tank pressure continues to increase during cleaning


Reason: The cleaning valve is not opened, the intake pressure is too high, and the pipeline is not dredged.


Method: Ensure that the pipeline is unblocked, preferably not to be bent; When cleaning, the relative pressure in the tank will continue to be lower than 0.5 mbar.


4. The main valve of the purification column is defective


Reason: The working gas pressure is less than 0.5Mpa; The main valve signal feedback is faulty.


Method: Replace the working gas cylinder, or check the pressure of the auxiliary gauge of the pressure reducing valve at 0.5Mpa; Check the signal switch of the main valve.


5. The loop cannot be opened


Reason: low pressure or high pressure maintenance of the fan inverter.


Method: After the voltage is stable, shut down and restart after 1 minute.

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Glove Box Structure Principle

The structure principle of the glove box: It is mainly composed of the main box body and the antechamber. If users have other special requirements, they can also be designed and manufactured according to their needs.

There are two (or more than two) glove operation interfaces on the main box body, which are distributed on the front side (or front and back sides) of the box body, which enables the operation box to be operated by one (or several) people at the same time, which improves the box body the efficiency of use. In addition, there are observation windows on the front (or front and back) of the box, so that the operator can clearly observe the operation process inside the box, making the operation process intuitively displayed in front of the operator. The valve of the antechamber has suction and charging nozzles, which can be connected when suction or charging is required. Valves and nozzles are also installed on the main box body, which can be used by users when deflating or inflating the main box body to maintain air pressure balance (the three-way valve between the glove ports can also be used to deflate if necessary). Illumination fluorescent lamps are installed above the front observation window of the main box.

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Daily Maintenance of the Glove Box

1. Before and after each work, first clean the environment to make the ground dry and clean. Then clean the equipment, including the inside and outside of the glove box, the observation system, and the work surface to be free of debris and clean.


2. Carefully record the H2O and oxygen content of the glove box and the gas consumption of the equipment every day to avoid insufficient gas pressure, which will cause the equipment to stop running.


3. Pay attention to the gas volume in the working gas cylinder at any time and replace it in time.


4. In case of power failure, press the "Vacuum Pump" button on the panel to run the vacuum pump after power on.

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Working Principle of Glove Box Purification

The  glove box cycle is a closed cycle. Driven by the fan, the gas in the box passes through the purification column in the purification system and then returns to the chamber. After a long period of circulation, the purification column gradually absorbs the trace amounts of H2O and O2 in the chamber.

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What to do If the H2O and O2 Content in the Nichwell Glove Box is Too High?

The cycle of the Nichwell glove box is a closed cycle. Driven by the fan, the gas in the chamber passes through the purification column in the purification system and then returns to the chamber. After a long period of circulation, the purification column gradually absorbs the trace amounts of H2O and O2 in the chamber.

What should I do if the H2O and O2 content in the Etelux glove box is too high and cannot be reduced?

Problem check

(1) Check whether the cycle is turned on and the fan has not turned up.

(2) There are items containing H2O and O2 in the chamber

(3) If the chamber body is leaking, check the leak rate.

(4) Whether any medicine interferes with the probe detection.

(5) Temperature has a certain influence on H2O content;

(6) Incomplete baking of activated carbon will also have a certain impact on H2O;

(7) The H2O and O2 sensor itself needs calibration or maintenance.

(8) Check the reproduction record, whether it has not been reproduced for a long time. Or the effect of old equipment is not satisfactory after regeneration. Comprehensively determine whether the purification material should be replaced.

The solutions are as follows:

(1) Check the reason for insufficient air pressure or inverter protection. The air pressure needs to be adjusted to 0.5 MPa, and the power supply can be restarted under inverter protection;

(2) Take out the oxygen-containing substance in the box, and put the paper towels, cotton cloth, and thread gloves in the box into the glove box after baking;

(3) Use the foam method to check the air circuit maintenance, first check the easiest position of the glove;

(4) Seal the medicine inside the box and clean the surface of the probe. If it is polluted by volatile medicines, it is necessary to clean the box environment at the same time;

(5) Reduce the temperature in the stable box, such as turning on the air conditioner, adding cooling water, etc.;

(6) Re-bake the activated carbon;

(7) The solution needs to be returned to the factory for calibration and repair;

(8) The solution is not satisfactory after regeneration or old equipment regeneration, comprehensively judge whether the purification material should be replaced.

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