Leybold
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The Leybold D 40 B is a dual-stage oil-sealed rotary vane vacuum pump. The Leybold D 40 B has a pumping speed of 40 m3/h. The Leybold D 40 B uses DN 40 KF connections on the intake and exhaust sides.[1][2]
Power
3-phase, 208-460 VAC, 50/60 Hz[4]
Vacuum
46 m3/h (27.1 cfm)[2]
Gas delivery
57 / 59 dB(A) without/with gas ballast[2]
The D 40 B is a dual-stage pump from the TRIVAC B series manufactured by Leybold. The pump has a nominal pumping speed of 55 cubic meters per hour (32.5 CFM). The ultimate total pressure without gas ballast is ≤ 2 × 10⁻³ mbar (≤ 1.5 × 10⁻³ Torr). The ultimate partial pressure without gas ballast is 1 × 10⁻⁴ Torr. The noise level is 57 dB(A) without gas ballast and 59 dB(A) with gas ballast. The oil filling capacity is 1.7 L minimum to 2.6 L maximum. The water vapor capacity is 1184 grams per hour. The pump operates on 3-phase 208-460 VAC, 50/60 Hz.[3][4][1][5]
The Leybold D 40 B is commonly used for vacuum furnace evacuation, backing turbomolecular pumps, backing diffusion pumps, rotary evaporation, refrigeration system evacuation, epoxy degassing, vacuum sterilization, backing mass spectrometers, freeze drying, vacuum centrifugal applications, vacuum distillation, and space research.[4][1]
The D 40 B is employed in many industrial and research vacuum processes, including coating, chemistry, metallurgy, vacuum furnaces, lamp and tube manufacturing, space simulation, environmental engineering, and as a backing pump for large turbomolecular pump systems.[1]
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| TRIVAC D 40 BCS | — | — | Corrosive PFPE (perfluoropolyether) application version of the D 40 B; Leybold part number 11388. | ajvs.com[1] |
| TRIVAC D 40 B ATEX Category 3 i/3o versions | — | — | ATEX Category 3 i and 3 i/o versions with mineral oil; catalog numbers 140180 and 140190 with motor type EeDA 100L/4A rated 2600 W at 50 Hz. | ajvs.com[2] |
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The Leybold D 40 B is an oil-sealed, dual-stage rotary vane vacuum pump from the TRIVAC B series.[3][1]
The nominal pumping speed is 55 m³/h (32.5 cfm).[3]
The ultimate pressure is less than 2.0×10⁻³ mbar (1.5×10⁻³ Torr).[1]
Applications include vacuum furnace evacuation, backing turbomolecular pumps, backing diffusion pumps, rotary evaporation, refrigeration evacuation, epoxy degassing, vacuum sterilization, mass spectrometry backing, freeze drying, vacuum distillation, space research, vacuum coating, chemistry, metallurgy, and more.[4][1]
The following facts about the D 40 B are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the D 40 B are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the D 40 B are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the D 40 B are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the D 40 B is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the D 40 B are on record.
Answerable by: an OEM parts catalog or a service engineer
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Last updated Oct 2, 2026.