- 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 Rotary Vane 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 Rotary Vane Pump is 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.
Pfeiffer Vacuum manufactures some of the most widely-utilized varieties of advanced rotary vane used in a variety of industrial applications in the twenty-first century, including laboratory processes, chemical and process engineering, among others. These products are ideally utilized for the low-to-medium intensity vacuum range. Pfeiffer vacuum pumps are especially known for their durability and wide range of application.
A rotary vane pump functions as a displacement pump, creating a low-pulsation suction volume flow. Rotary vane pumps include an eccentrically-supported rotor with two rotating vanes, encased and revolving within a housing. The Pfeiffer Rotary Vane Pumps offered to our clients are oil-lubricated (wet-version pumps); these operating fluids help to enhance the insulation of pump components and ensure maximum durability and efficiency of the product.
We offer both single-stage and dual-stage Pfeiffer Rotary Vane Vacuum Pumps on our website. Single-stage pumps are the preferred choice for low-intensity vacuum applications, while dual-stage pumps are the recommended choices for the medium and upper intensity range of vacuum applications.

A&J Vacuum services and repairs Pfeiffer DUO 3, DUO 3M, along with all other Pfeiffer Rotary Vane 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.
| Flange (in) | DN 16 ISO-KF |
| Flange (out) | DN 16 ISO-KF |
| Pumping speed | 2.5 m³/h | 1.47 cfm | 41.67 l/min |
| Ultimate pressure with gas ballast | 3 · 10-3 hPa | 2.25 · 10-3 Torr | 3 · 10-3 mbar |
| Ultimate pressure without gas ballast | 3 · 10-3 hPa | 2.25 · 10-3 Torr | 3 · 10-3 mbar |
| Exhaust pressure, min. | Atmospheric pressure |
| Exhaust pressure, max. | 1,500 hPa | 1,125 Torr | 1,500 mbar |
| Rotation speed | ≥ 3,000 rpm | ≥ 3,000 min-1 |
| Cooling method, standard | Air |
| Motor protection | Electronically |
| Motor version | DC motor |
| Ambient temperature | -20-40 °C | -4-104 °F | 253-313 K |
| Emission sound pressure level without gas ballast or purge | 53 dB(A) |
| Switch | No |
| Recommended mains fuse capacity | 16 A |
| Mains cable | Yes, with bare ends |
| Operating fluid | Inland 45 |
| Operating fluid filling | 0.4 l |
| Leak rate safety valve | 1 · 10-5 Pa m3/s | 7.5 · 10-5 Torr l/s | 1 · 10-4 mbar l/s |
| Dimensions (L x W x H) | 275 x 123 x 173 mm | 10.83 x 4.84 x 6.81 inch |
| Voltage: Range | ±10 % |
| Rated current absorption | 9.8 A |
| Protection category | IP20 |
| Weight | 7 kg | 15.43 lb |
A&J Vacuum services and repairs Pfeiffer DUO 3, DUO 3M, along with all other Pfeiffer Rotary Vane 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.