- Dual-Stage High Performance Rotary Vane Pump
- Motor Incorporates Diverse Voltage Settings
- Included Gas Ballast & Safety Valve
- Optional Feature for Magnetic Coupling
Power cable is not included. Please view the accessories tab for compatible cables.
The Pfeiffer DUO 6 Vacuum Pump is a direct replacement and update over the now-obsolete Pfeiffer DUO 2.5 Vacuum Pump. The DUO 6 series of Pfeiffer Rotary Vane vacuum pumps incorporates oil-stage lubrication and a two-stage operating mechanism.
Our Pfeiffer DUO 6 vacuum pumps are likewise equipped with a high vacuum safety valve. This valve mechanism tightly seals the vacuum chamber while the pump is operating at standstill mode, while simultaneously allowing for ventillation of the pump.

A&J Vacuum services and repairs Pfeiffer Uno, 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.
Technical Data DUO 6, 1-phase motor, 230/240 V, 50/60 Hz
| Flange (in) | DN 16 ISO-KF |
| Flange (out) | DN 16 ISO-KF |
| Pumping speed at 50 Hz | 5 m³/h | 2.94 cfm | 83.33 l/min |
| Pumping speed at 60 Hz | 6 m³/h | 3.53 cfm | 100 l/min |
| Ultimate pressure with gas ballast | 3 · 10-2 hPa | 2.25 · 10-2Torr | 3 · 10-2 mbar |
| Ultimate pressure without gas ballast | 3 · 10-3 hPa | 2.25 · 10-3Torr | 3 · 10-3 mbar |
| Exhaust pressure, min. | Atmospheric pressure |
| Exhaust pressure, max. | 1,500 hPa | 1,125 Torr | 1,500 mbar |
| Water vapor capacity 50 Hz | 110 g/h |
| Water vapor capacity 60 Hz | 170 g/h |
| Water vapor tolerance at 50 Hz | 30 hPa | 22.5 Torr | 30 mbar |
| Water vapor tolerance at 60 Hz | 40 hPa | 30 Torr | 40 mbar |
| Rotation speed at 50 Hz | 3,000 rpm | 3,000 min-1 |
| Rotation speed at 60 Hz | 3,600 rpm | 3,600 min-1 |
| Cooling method, standard | Air |
| Motor protection | Bimetal |
| Motor version | 1-ph motor |
| Ambient temperature | 12-40 °C | 53.6-104 °F | 285-313 K |
| Emission sound pressure level without gas ballast at 50 Hz | 51 dB(A) |
| Emission sound pressure level without gas ballast at 60 Hz | 54 dB(A) |
| Switch | Yes |
| Mains requirement: voltage (range) | ±10 % |
| Mains requirement: voltage 50 Hz | 230 – 240 V |
| Mains requirement: voltage 60 Hz | 230 – 240 V |
| Recommended mains fuse capacity | 6 A |
| Mains cable | No, C14-plug inside the terminal box |
| Operating fluid | P3 |
| Operating fluid filling | 0.5 l |
| Leak rate safety valve | ≤ 1 · 10-5 Pa m3/s | ≤ 7.5 · 10-5 Torr l/s | ≤ 1 · 10-4mbar l/s |
| Dimensions (L x W x H) | 373 x 130 x 178 mm | 14.69 x 5.12 x 7.01 inch |
| Rated power 50 Hz | 0.2 kW |
| Rated power 60 Hz | 0.24 kW |
| Protection category | IP40 |
| Weight | 14.8 kg | 32.63 lb |
A&J Vacuum services and repairs Pfeiffer Uno, 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.