VACUUBRAND MD 1 Diaphragm Vacuum Pump – Brand New
The VACUUBRAND MD 1 Diaphragm Vacuum Pump is a compact, oil-free laboratory vacuum pump designed for deep-vacuum applications involving compatible non-corrosive gases. Featuring a four-head, three-stage diaphragm design, the MD 1 reaches an ultimate vacuum of 1.5 mbar (1.1 Torr) while delivering maximum pumping speed of 0.82 cfm at 60 Hz. This combination of deep vacuum, clean oil-free operation, exceptionally low noise, and compact construction makes the MD 1 an excellent choice for degassing, vacuum drying, analytical instrumentation, exhaust-gas analysis, backing compact turbomolecular pumps, and other laboratory applications requiring low pressure with moderate gas throughput.
This brand-new VACUUBRAND MD 1 Diaphragm Vacuum Pump, Catalog Number 20696083, is available from American Instrument Exchange for analytical, physics, materials science, pharmaceutical, biotechnology, academic, and industrial laboratories seeking deep diaphragm-pump vacuum without the oil maintenance and contamination concerns associated with rotary vane pumps.
VACUUBRAND MD 1 Diaphragm Vacuum Pump Key Features
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Brand-new VACUUBRAND MD 1 diaphragm vacuum pump
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Completely oil-free vacuum generation
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1.5 mbar / 1.1 Torr ultimate vacuum
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0.82 cfm maximum pumping speed at 60 Hz
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1.2 m³/h maximum pumping speed at 50 Hz
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Four diaphragm heads
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Three pumping stages
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Excellent pumping performance even near ultimate vacuum
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Designed for compatible non-corrosive gases and vapors
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PTFE diaphragm construction
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Exceptionally quiet operation at approximately 40 dBA
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Very low vibration
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Compact footprint
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Maintenance-free drive system
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Long diaphragm operating life
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No vacuum pump oil required
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No oil mist or oil backstreaming
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Suitable as a backing pump for compatible compact turbomolecular systems
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NRTL-certified configuration
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Supplied completely assembled and ready for use
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Available brand new from American Instrument Exchange
VACUUBRAND MD 1 Diaphragm Vacuum Pump Overview
The VACUUBRAND MD 1 is engineered for laboratories that need substantially deeper vacuum than conventional single- or two-stage diaphragm pumps can provide, but do not require the extreme vacuum range of an oil-sealed rotary vane system.
Its four diaphragm heads are arranged across three pumping stages, progressively reducing pressure until the pump reaches an ultimate vacuum of approximately 1.5 mbar / 1.1 Torr. This gives the MD 1 significantly deeper vacuum performance than general-purpose ME-series pumps while retaining the clean operation and low maintenance associated with diaphragm technology.
The MD 1 is particularly useful where contamination control is important. Because the pump operates without oil, there is no possibility of vacuum oil backstreaming into connected instrumentation or vacuum chambers. There is also no oil mist, no routine oil replacement, and no contaminated pump oil to dispose of.
VACUUBRAND specifies the MD 1 for non-corrosive gases and vapors. Its wetted materials include aluminum alloys, PTFE, FPM, polyethylene, and related materials. Laboratories expecting regular exposure to aggressive solvents or corrosive chemical vapors should instead consider the chemistry-resistant VACUUBRAND MD 1C.
VACUUBRAND MD 1 Key Specifications
| Specification |
Details |
| Manufacturer |
VACUUBRAND |
| Model |
MD 1 |
| Equipment Type |
Oil-Free Diaphragm Vacuum Pump |
| Catalog Number |
20696083 |
| Pump Design |
Oil-Free Diaphragm |
| Number of Heads |
4 |
| Number of Stages |
3 |
| Maximum Pumping Speed at 60 Hz |
0.82 cfm |
| Maximum Pumping Speed at 50 Hz |
1.2 m³/h |
| Ultimate Vacuum |
1.5 mbar / 1.1 Torr |
| Maximum Back Pressure |
1.1 bar absolute |
| Inlet Connection |
Hose Nozzle DN 6 mm |
| Outlet Connection |
Silencer / G1/8" |
| Diaphragm Material |
PTFE |
| Valve Material |
FPM |
| Rated Motor Power |
0.08 kW / 80 W |
| Rated Motor Speed |
1500 rpm at 50 Hz / 1800 rpm at 60 Hz |
| Operating Ambient Temperature |
10°C to 40°C |
| Storage Temperature |
-10°C to 60°C |
| Exterior Dimensions (L × W × H) |
326 × 143 × 215 mm (12.8 × 5.6 × 8.5 in.) |
| Weight |
7.3 kg (16.1 lb) |
| Sound Pressure Level |
Approximately 40 dBA
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| Protection Class |
IP40 |
| ATEX Conformity |
II 3/- G Ex h IIC T3 Gc X, Internal Atmosphere Only |
| Electrical Requirements |
100–115 VAC, 50/60 Hz; 120 VAC, 60 Hz; 220–230 VAC versions available |
| Certification |
NRTL Certified |
| Condition |
Brand New |
Energy Efficiency & Operating Costs
The VACUUBRAND MD 1 uses an 80-watt motor while reaching an ultimate vacuum of 1.5 mbar, making it an efficient solution for laboratories that need deep vacuum but relatively modest pumping speed.
Because the MD 1 operates completely oil-free, laboratories eliminate vacuum pump oil purchases, routine oil changes, contaminated-oil disposal, oil mist, and the possibility of oil backstreaming into sensitive instrumentation.
This can provide an important ownership advantage over rotary vane pumps when the required pressure is within the MD 1's operating range. Routine maintenance primarily involves inspection and eventual replacement of diaphragms and valves rather than oil servicing.
The maintenance-free drive system and proven diaphragm technology are designed for long operating life and low ongoing service requirements.
Common Applications
The VACUUBRAND MD 1 is particularly well suited for degassing, vacuum drying, analytical instrumentation, exhaust-gas analysis, evacuation of laboratory apparatus, vacuum manifolds, physics experiments, materials research, and backing compatible compact turbomolecular pumps.
Its combination of deep oil-free vacuum and relatively modest gas throughput makes it especially useful where final pressure and cleanliness are more important than very high pumping speed.
Ideal Laboratory Types
The MD 1 is an excellent choice for analytical laboratories, physics laboratories, materials science groups, semiconductor research facilities, university research laboratories, pharmaceutical development laboratories, biotechnology companies, instrument-development groups, vacuum research laboratories, and industrial R&D facilities.
It is particularly useful in environments where oil contamination of the vacuum system would be undesirable.
Three-Stage Deep Vacuum Performance
The defining feature of the MD 1 is its four-head, three-stage diaphragm configuration.
Each pumping stage progressively lowers pressure, allowing the MD 1 to achieve approximately 1.5 mbar / 1.1 Torr without using vacuum oil.
This places the MD 1 in a much deeper vacuum class than general-purpose ME-series pumps, which are optimized primarily for filtration, aspiration, and moderate-vacuum evacuation.
The MD 1 also maintains useful pumping performance as pressure approaches ultimate vacuum, helping laboratory systems pull down efficiently into the low-mbar range.
Oil-Free Deep Vacuum Technology
Traditional deep-vacuum laboratory systems often rely on oil-sealed rotary vane pumps. These pumps can achieve significantly deeper ultimate pressures but require oil for sealing and lubrication.
The MD 1 instead uses diaphragm technology to provide deep vacuum without oil.
This offers several practical benefits:
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No vacuum pump oil
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No oil changes
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No oil mist
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No contaminated-oil disposal
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No oil backstreaming
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Cleaner connected vacuum chambers
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Lower routine maintenance
For applications requiring approximately 1–2 mbar rather than true fine vacuum, the MD 1 can therefore provide a particularly clean and convenient alternative.
MD 1 for Degassing
The MD 1 is well suited for degassing liquids, viscous materials, polymers, resins, and other compatible samples.
Reducing pressure removes dissolved and entrained gases that may otherwise interfere with analytical measurements, coating processes, curing, formulation, or materials testing.
The MD 1's 1.5 mbar ultimate vacuum allows significantly more aggressive degassing than basic laboratory filtration pumps, while oil-free operation helps avoid contamination of sensitive materials.
MD 1 for Vacuum Drying
The MD 1 can also support compatible vacuum drying chambers and small vacuum ovens that require low-mbar pressure.
Reducing chamber pressure lowers the boiling point of moisture and suitable volatile compounds, allowing drying to occur at reduced temperatures.
This can be particularly useful for heat-sensitive materials, analytical samples, polymers, electronics, and materials-science workflows.
Users should verify the chamber volume, target pressure, gas load, and manufacturer pump requirements before selecting the MD 1 for a particular drying system.
MD 1 for Analytical & Instrument Vacuum
The MD 1 is particularly valuable where an analytical instrument requires a clean, oil-free backing or rough vacuum source.
Applications can include exhaust-gas analysis, analytical instrumentation, detector systems, vacuum manifolds, and other research equipment requiring pressure in the low-mbar range.
Its approximately 40 dBA sound level also makes it well suited for instrument laboratories where equipment may operate continuously near researchers.
MD 1 as a Backing Pump for Turbomolecular Pumps
VACUUBRAND identifies backing of compact turbomolecular drag pumps as an application for the MD 1.
Turbomolecular pumps require a suitable forevacuum or backing pump to reduce pressure sufficiently for high-vacuum operation. In compatible systems, the MD 1 can provide clean oil-free backing vacuum without introducing rotary vane pump oil into the foreline.
Compatibility should always be confirmed with the turbomolecular pump manufacturer because required backing pressure and gas throughput vary significantly between systems.
Quiet Operation & Low Vibration
The MD 1 operates at approximately 40 dBA, making it one of the quieter pumps in the VACUUBRAND diaphragm lineup.
Low vibration is equally valuable for analytical instruments, optical experiments, balances, microscopy systems, and other sensitive laboratory equipment.
The combination of quiet operation and compact dimensions allows the MD 1 to be positioned relatively close to laboratory instrumentation without introducing the level of noise and vibration associated with many conventional vacuum pumps.
MD 1 vs. MD 1C
The MD 1 and MD 1C provide very similar deep-vacuum performance, but they are designed for different gas streams.
The MD 1 reaches approximately 1.5 mbar and is intended primarily for compatible non-corrosive gases and vapors.
The MD 1C is the chemistry-resistant version, reaching approximately 2 mbar while incorporating fluoroplastic wetted components designed for corrosive gases and solvent vapors.
For physics, analytical instrumentation, degassing, and clean non-corrosive vacuum, the MD 1 is an excellent choice.
For organic chemistry, solvent evaporation, medicinal chemistry, or aggressive chemical-vapor applications, the MD 1C is generally more appropriate.
MD 1 vs. ME 4 NT
The MD 1 and ME 4 NT illustrate the tradeoff between vacuum depth and pumping speed.
The ME 4 NT reaches approximately 70 mbar but provides about 2.6 cfm at 60 Hz.
The MD 1 reaches approximately 1.5 mbar but provides only about 0.82 cfm.
For filtration, manifolds, and higher-throughput moderate-vacuum work, the ME 4 NT is generally better suited.
For degassing, vacuum drying, instrumentation, and low-pressure applications where deep vacuum matters more than gas throughput, the MD 1 is the stronger choice.
MD 1 vs. MZ 1C
The MZ 1C is a chemistry-resistant two-stage pump reaching approximately 12 mbar, while the MD 1 uses three stages to reach approximately 1.5 mbar.
The MZ 1C is better suited for chemically aggressive solvent applications where moderate-to-deep vacuum is sufficient.
The MD 1 provides substantially deeper vacuum but is intended for compatible non-corrosive gas streams.
Pump selection should therefore consider both required pressure and chemical compatibility.
MD 1 vs. RZ 2.5 Rotary Vane Pump
The MD 1 provides deep diaphragm-pump vacuum, but it does not reach the fine-vacuum range of a two-stage rotary vane pump.
The MD 1 reaches approximately 1.5 mbar.
The RZ 2.5 reaches approximately 0.002 mbar, or roughly three orders of magnitude deeper.
The MD 1 provides the advantages of oil-free operation, minimal maintenance, low vibration, and very quiet operation.
The RZ 2.5 is more appropriate for freeze drying, Schlenk-line chemistry, and other applications requiring true fine vacuum.
For systems that only require low-mbar pressure, the MD 1 may avoid unnecessary complexity and oil maintenance.
Recommended Laboratory Applications
The VACUUBRAND MD 1 is recommended for:
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Degassing
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Vacuum drying
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Small vacuum ovens
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Analytical instrumentation
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Exhaust-gas analysis
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Physics experiments
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Materials research
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Vacuum manifolds
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Evacuation of laboratory apparatus
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Backing compatible turbomolecular pumps
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Instrument vacuum
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Research vacuum systems
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Clean oil-free low-mbar vacuum
The MD 1 is intended primarily for compatible non-corrosive gases and vapors. Applications involving aggressive solvents or corrosive chemicals should be evaluated for an appropriate chemistry-resistant pump.
Why Choose the VACUUBRAND MD 1?
The MD 1 is particularly attractive when a laboratory needs deep vacuum but wants to avoid oil-sealed pump technology.
Its combination of:
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1.5 mbar ultimate vacuum
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Four heads
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Three pumping stages
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Oil-free operation
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80-watt motor
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Approximately 40 dBA operating noise
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Compact 12.8" × 5.6" × 8.5" footprint
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Only 16.1 lb weight
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No oil mist or backstreaming
makes it an excellent solution for clean laboratory vacuum systems where very high pumping throughput is unnecessary.
Brand-New VACUUBRAND Vacuum Pumps from American Instrument Exchange
American Instrument Exchange offers the VACUUBRAND MD 1 brand new, providing laboratories with current VACUUBRAND oil-free deep-vacuum diaphragm technology from an established laboratory equipment supplier.
American Instrument Exchange offers a broad VACUUBRAND lineup spanning individual filtration pumps, high-throughput diaphragm pumps, chemistry-resistant ME and MZ pumps, deep-vacuum MD models, VARIO automatic-control systems, rotary vane pumps, and Chemistry-HYBRID vacuum technology.
This allows laboratories to select the right pump based on required vacuum depth, pumping speed, chemical compatibility, process control, and vapor-handling requirements.
Shipping and Installation Considerations
The VACUUBRAND MD 1 is supplied completely assembled and ready for use.
Catalog number 20696083 is the configuration listed by American Instrument Exchange. Buyers should verify the nameplate voltage before installation because VACUUBRAND offers versions for 100–115 VAC, 120 VAC, and 220–230 VAC operation at applicable 50/60 Hz frequencies.
The inlet uses a DN 6 mm hose nozzle, while the outlet incorporates a silencer with G1/8" connection.
Vacuum tubing should be properly rated for low-mbar vacuum service and compatible with the gas being pumped. Larger or unnecessarily long tubing runs can reduce effective pumping speed at the connected equipment.
Related Laboratory Equipment
Laboratories purchasing deep-vacuum diaphragm pumps frequently also require vacuum ovens, vacuum manifolds, degassing chambers, analytical instruments, laboratory reactors, turbomolecular pumps, cold traps, freeze dryers, and other vacuum-processing equipment.
American Instrument Exchange offers new and refurbished laboratory equipment for analytical research, materials science, pharmaceutical development, biotechnology, physics laboratories, academic research, and industrial R&D.
VACUUBRAND MD 1 Frequently Asked Questions
What is the VACUUBRAND MD 1 primarily used for?
The MD 1 is designed for continuous, oil-free evacuation and pumping of compatible non-corrosive gases in applications such as degassing, vacuum drying, analytical instrumentation, exhaust-gas analysis, and backing suitable compact turbomolecular pumps.
What is the ultimate vacuum of the MD 1?
The VACUUBRAND MD 1 reaches an ultimate vacuum of 1.5 mbar, or approximately 1.1 Torr.
What is the pumping speed of the MD 1?
Maximum pumping speed is approximately 0.82 cfm at 60 Hz or 1.2 m³/h at 50 Hz.
Is the MD 1 oil-free?
Yes. The MD 1 uses a completely oil-free diaphragm pumping mechanism, eliminating vacuum oil changes, oil mist, oil disposal, and oil backstreaming.
How many pump heads and stages does the MD 1 have?
The MD 1 uses four diaphragm heads arranged across three pumping stages.
Is the MD 1 a chemistry-resistant vacuum pump?
No. The standard MD 1 is intended primarily for compatible non-corrosive gases and vapors. Laboratories handling aggressive chemical or solvent vapors should consider the VACUUBRAND MD 1C chemistry diaphragm pump.
Can the MD 1 be used for degassing?
Yes. Its 1.5 mbar ultimate vacuum makes it well suited for many laboratory degassing applications involving compatible materials.
Can the MD 1 be used with a vacuum oven?
Yes, provided the oven's required ultimate vacuum, chamber size, gas load, and materials are compatible with the MD 1's performance and wetted materials.
Can the MD 1 be used as a backing pump for a turbomolecular pump?
Yes, in compatible systems. VACUUBRAND identifies backing compact turbomolecular drag pumps as an application for the MD 1. The turbopump manufacturer's forevacuum requirements should always be verified.
What is the difference between the MD 1 and MD 1C?
The MD 1 is optimized for clean, non-corrosive deep vacuum, while the MD 1C uses chemistry-resistant materials for corrosive and solvent-vapor applications. Both provide deep diaphragm-pump vacuum in approximately the 1.5–2 mbar range.
What is the difference between the MD 1 and ME 4 NT?
The ME 4 NT provides much higher pumping speed but only reaches approximately 70 mbar. The MD 1 provides lower pumping speed but reaches a much deeper 1.5 mbar, making it better suited for drying, degassing, and instrument vacuum.
What is the difference between the MD 1 and RZ 2.5?
The MD 1 is an oil-free diaphragm pump reaching 1.5 mbar, while the RZ 2.5 is an oil-sealed two-stage rotary vane pump reaching approximately 0.002 mbar. The RZ 2.5 is appropriate for true fine-vacuum applications, while the MD 1 is ideal where clean, oil-free low-mbar vacuum is sufficient.
How quiet is the VACUUBRAND MD 1?
VACUUBRAND specifies a sound pressure level of approximately 40 dBA, making the MD 1 exceptionally quiet for a deep-vacuum laboratory pump.
What are the dimensions of the MD 1?
The MD 1 measures approximately 12.8" L × 5.6" W × 8.5" H and weighs approximately 16.1 lb.
What are the electrical requirements?
VACUUBRAND offers MD 1 configurations for 100–115 VAC, 120 VAC, and 220–230 VAC, depending on catalog configuration. Buyers should verify the exact nameplate voltage before installation.
Is this VACUUBRAND MD 1 refurbished or used?
No. This VACUUBRAND MD 1 Diaphragm Vacuum Pump is brand new, not refurbished or previously used, and is available from American Instrument Exchange.
