Apply zeolite molecular sieve as shift, adopt advanced physical theory(PSA) to separate oxygen and nitrogen in air, at the same time filter the bad subtance in air, so as to get pure oxygen for medical use.

7F-3 technical data:
Power supply: AC220±22V,50±1Hz
Input power: 320VA
Oxygen flow: 0.5~3L/min
Oxygen concentration: 93%±3%
Output pressure: 20~50kPa 
Operation noise: ≤55dB (A)

We are mainly dealing in vari