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Dry screw vacuum pumps began to be used in the 1980s, initially in the semiconductor industry, and in the early 1990s in the chemical industry.

 

Its main features are as follows:

1. No pollution to the process gas

2. No waste water is produced

3. No vacuum oil consumption, no lampblack emission

4. can recover the pumped medium, condensation recovery of various solvents

5. can achieve higher vacuum degree

6. Low maintenance and cost

 

Application process:

1. Electrician: transformer, mutual inductor, epoxy resin vacuum casting, capacitor vacuum immersion oil, vacuum pressure immersion.

2. Industrial furnace: vacuum brazing, vacuum sintering, vacuum annealing, vacuum pressurized gas quenching, vacuum dehydrogenation, etc.

3. Vacuum coating: vacuum evaporation coating, vacuum magnetron sputtering coating, continuous film winding coating, ion plating, etc.

4. Metallurgy: special steel smelting, vacuum induction furnace, vacuum desulfurization, degassing.

5. Aviation and aerospace: space carrying spacecraft orbital module, re-entry module, rocket attitude adjustment module, space suit, astronaut space exit module, aircraft liftoff and other vacuum simulation tests.

6. Drying: vacuum drying by variable pressure, coal and gas tank drying, wood drying, vegetable freeze drying.

7. Chemical, pharmaceutical: product distillation, drying, degassing, material transportation, etc.