- Dual-Stage High Performance Rotary Vane Pump
- Integrated Gas Ballast & Safety Valve
- Includes Option For Magnetic Coupling
- Maximum Exhaust Pressure 1500 hPa
The Pfeiffer DUO 3 Vacuum Pump is a direct replacement for the now-obsolete Pfeiffer DUO 2.5 Vacuum Pump. The Pfeiffer DUO 3 Vacuum Pump series includes oil-sealed, two-stage Rotary Vane Vacuum Pumps.
The Pfeiffer DUO 3 vacuum pumps are equipped with a high vacuum safety valve, which, when the pump is at a standstill, tightly closes the vacuum chamber while simultaneously allowing for ventillation of the pump.

A&J Vacuum services and repairs Pfeiffer DUO 3, DUO 3M, along with all other Pfeiffer Vacuum and Turbo Pumps available on our website. Please contact us for additional information concerning our service program or click http://www.ajvs.com/service.php to access our Services page. We likewise offer emergency service and repair upon request. For more information, please contact A&J Vacuum Services at (973) 249-0854. Thank you for choosing AJVS as your supplier.
| Ambient temperature | 20 – 40 °C | 68 – 104 °F | 293.15 – 313.15 K |
| Certification | CE |
| Connection flange (in) | DN 16 ISO-KF |
| Connection flange (out) | DN 16 ISO-KF |
| Cooling method | Air (Forced convection) |
| Current, max. | 16 A |
| Dimensions (L x W x H) | 313 x 123 x 173 mm | 12.32 x 4.84 x 6.81 inch |
| Exhaust pressure, max. | 1500 hPa | 1,125 Torr | 1,500 mbar |
| Exhaust pressure, min. | 250 hPa | 187.5 Torr | 250 mbar |
| Input voltage(s) | 24 V DC (±10 %) |
| Leakage rate safety valve | 1 · 10-5 Pa m³/s | 7.5 · 10-5 Torr l/s | 1 · 10-4 mbar l/s |
| Mains cable | Yes |
| Motor type | DC motor |
| Number of pumping stages | Two stage |
| Operating fluid | Inland 45 |
| Power consumption max. | 340 W |
| Protection degree | IP20 |
| Pumping principle | Oil-lubricated |
| Pumping speed | 2.5 m³/h | 1.47 cfm | 41.67 l/min |
| Recommended on-site electric fuse protection | 16 A |
| Rotation speed | ≥ 3000 rpm |
| Ultimate pressure | 3 · 10-3 hPa | 2.25 · 10-3 Torr | 3 · 10-3 mbar |
| Ultimate pressure with gas ballast | 3 · 10-3 hPa | 2.25 · 10-3 Torr | 3 · 10-3 mbar |
| Weight approx. | 8.5 kg | 18.74 lb |
A&J Vacuum services and repairs Pfeiffer DUO 3, DUO 3M, along with all other Pfeiffer Vacuum and Turbo Pumps available on our website. Please contact us for additional information concerning our service program or click http://www.ajvs.com/service.php to access our Services page. We likewise offer emergency service and repair upon request. For more information, please contact A&J Vacuum Services at (973) 249-0854. Thank you for choosing AJVS as your supplier.
We can have a repair estimate ready for your equipment within the hour of submission.
Start your equipment repair process by creating a Service RMA.
A&J Vacuum Services provides repairs on all types of High Vacuum equipment. We perform Turbomolecular Pump repair, Turbo Pump Repair, Dry Pump repair, Vacuum Pump repair and Mass Spectrometer repair. Our highly trained technicians will deliver the highest quality service and satisfaction.
We operate at our own full service repair facility which allows us to quickly and economically perform all repairs in a timely manner. Our advandced machinery enables us to handle all facets of the service and repair process. AJVS utilizes industry standard vibration analysis equipment and advanced testing equipment to troubleshoot and minimize all equipment failures. Our in-house machine shop is capable of machining various components, prototypes and housing conversions as needed.