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Leybold D25B Vacuum Pump PFPE Specialty Fluid 21 CFM REBUILT w/ 1 Year Warranty


SKU: 40.33083.02

Additional information

Weight 120 lbs
New / Rebuilt

Level of Vacuum

CFM / L/M (Displacement)

Inlet / Exhaust

Power Options



All high vacuum pumps rebuilt and sold through AVAC have been completely disassembled, cleaned, re-machined and carefully inspected for wear by our factory trained technicians. Units are assembled with new vanes, shaft seals, exhaust valves, gaskets, springs, oil distribution valves and bearings prior to undergoing an extended performance test to meet or exceed OEM specifications. All pumps are then painted, detailed, and pass a final quality assurance inspection prior to shipping. A final test certificate is provided with each pump, which will be covered with a one-year warranty.

Specially Built for PFPE Oils. PFPE Synthetic Fluids offer exceptional characteristics for chemical and oxidizing applications. These pumps are commonly used for pumping high concentrations of oxygen as well as  corrosive or aggressive applications, in use with turbo or cryo pumps, epoxy degassing, refrigeration , freeze drying, mass spectrometer backing, space R & D, centrifugal vacuum applications, rotary evaporation, distillation,  backing diffusion pumps, vacuum sterilization, and more.

Leybold TRIVAC B vacuum pumps are designed for reliability and long service-life in mind. Directly linked to the motor via an elastic coupling element to ensure that the pump runs evenly and smoothly. With a type B 14 flanged motor screwed to the housing of the coupling. All pumps include a gas ballast valve as well as an inner section which may be exchanged without special tools or any special knowledge.

Trouble-free operation even at 1000 mbar intake pressure is ensured by a built-in oil pump, providing force-feed lubrication of the bearings from where a minimum amount of lubricant is fed to the compression and expansion chambers to ensure lubrication of the sliding vanes.

To minimize surface corrosion all components are protected by eliminating non-ferrous metals. The oil box, intake and exhaust line are made of aluminum and only solvent-resistant sealing materials are employed.

Special features

  • Environment-friendly
  • Low noise
  • Low vibration
  • Modern vacuum technology
  • High pumping speed right down to the ultimate pressure
  • Low ultimate pressure, even with gas ballast
  • High water vapor tolerance
  • Continuous operation right up to 1000 mbar
  • Built-in oil pump, force-feed lubrication sliding bearing
  • Minimal inherent air intake
  • Compact, air cooled
  • Handy, retractable handle
  • All controls and oil level check on the front side
  • Either horizontal or vertical intake and exhaust port
  • Pressure-controlled anti-suckback valve
  • Shaft seals and O-rings are all made of elastomer FPM

Leybold Vacuum Pump D25B PFPE Specialty Fluid 21 CFM REBUILT w/ 1 Year Warranty Specifications


  50 Hz60 Hz 
Nominal pumping speed 1)m3 x h-1 (cfm)29.5 (17.4)35.4 (20.9)
Pumping speed 1)m3 x h-1 (cfm)25.7 (15.1)30.8 (18.2)

Ultimate partial pressure without gas ballast 1)     

mbar (Torr)

                                             10-4 (0.75 x 10-4)

                                               10-4 (0.75 x 10-4)

Ultimate total pressure without gas ballast 1)                          

mbar (Torr)


< 2 x 10-3 (1.5 x 10-3)


< 2 x 10-3 (1.5 x 10-3)

Ultimate total pressure with gas ballast 1)                                

mbar (Torr)


< 5 x 10-3 (3.8 x 10-3)


< 5 x 10-3 (3.8 x 10-3)

Water vapor tolerance 1)mbar (Torr)25 (18.8)25 (18.8)
Water vapor capacityg/h476476
Oil filling, min. / max.l (qt)0.6 / 1.4 (0.6 / 1.5)0.6 / 1.4 (0.6 / 1.5)

Noise level 2) to DIN 45 635, without / with gas ballast                       


                                                   52 / 62

                                                  52 / 62

Admissible ambient temperature         °C (°F)12 - 40 (54 - 104)12 - 40 (54 - 104)
Motor rating 2)W (HP)750 (1)750 (1)
Nominal speedrpm15001800
Type of protection 3)IP5454
Weight 2)kg (lbs)32 (70.6)32 (70.6)
Connections, Intake and Exhaust              DN25 KF25 KF

Click Below for Specification Sheet

EM Rotary Vane Pumps