Precautions for using low pressure test chamber

1. The low pressure vacuum test chamber should be used in an environment with relative humidity ≤ 85% RH, no corrosive gas around, no strong vibration source and strong electromagnetic field.

2. The vacuum box shell must be effectively grounded to ensure the safety of use.

3. Vacuum box studio without explosion-proof, anti-corrosion treatment, do not put flammable, explosive, easy to produce corrosive gas items for drying, such as corrosive gas items need to explain in advance, in order to make with special corrosion-resistant materials.

Vacuum pump can not work for a long time, so when the vacuum degree reaches the requirement of dry articles, the vacuum valve should be closed first, and then the power supply of vacuum pump should be closed, and when the vacuum degree is less than the requirement of dry articles, the vacuum valve and power supply of vacuum pump should be opened again to continue vacuuming, so that the service life of vacuum pump can be prolonged, and the automatic interlocking device can be used to control, so that the vacuum degree required by the product will be stopped automatically, and when the vacuum degree is lower than the requirement, the vacuum pump will be started automatically. When the vacuum level is lower than the required vacuum level, the vacuum pumping will be started automatically.

5. If the dry goods are wet, add a filter between the vacuum box and the vacuum pump to prevent the wet gas from entering the vacuum pump and causing the vacuum pump to fail.

6. If the dried goods change to light weight and small volume after drying (small granularity), a barrier net should be added to the vacuum port in the working chamber to prevent the dry goods from inhaling and damaging the vacuum pump (or solenoid valve).

7. The low pressure vacuum test chamber box after many times use, will produce can not pumping vacuum phenomenon, at this time should replace the door seal or adjust the box body on the door buckle outreach distance to solve.

8. The vacuum box should be kept clean frequently. Doors glass should not be wiped with reactive chemical solution, should be wiped with soft cotton cloth, can not use sharp objects to paint tempered glass window.

9. If the vacuum box is not used for a long time, the exposed plating parts will be wiped clean and coated with neutral grease to prevent corrosion, and set on the plastic film dust cover, placed in a dry room, so as to avoid damage to electrical components by moisture, affecting the use.

10. The low pressure vacuum test chamber box does not need continuous pumping use, should first close the vacuum valve, and then close the vacuum pump power, otherwise the vacuum pump oil to back up to the box, can also be configured with a special valve to prevent the backflow of vacuum oil.

11. If the humidity of the dry goods in the working room is large, the water gas will affect the performance of the vacuum pump, so it is suggested to put a "drying/filter" in series between the drying box and the vacuum pump.

12. If inert gas such as nitrogen needs to be added in the process of drying goods, it should be specified in the contract and an additional air inlet valve should be provided.