... stable.3. Equipped with safety parts, sensitive and reliable, auto anti catalyst returning.4. Two levels purification system.5. Have low ... (mm)360*200*260370*330*180RemarksSingle stainless steel filter, anti alkali return, set at 0.4 MPa when deliveryTwo stainless steel gas ... deoxidant, higher purity, 0.4&0.6MPa two pressure selection. Anti alkali return we show our machine inside picture to display ...