VACUUBRAND RZ 6 Two-Stage Rotary Vane Vacuum Pump – Brand New
The VACUUBRAND RZ 6 Two-Stage Rotary Vane Vacuum Pump is a compact, high-performance laboratory vacuum pump designed for applications requiring deep ultimate vacuum combined with strong pumping speed. Delivering an ultimate vacuum of 2 × 10⁻³ mbar (1.5 × 10⁻³ Torr) and a maximum pumping speed of 4.0 cfm at 60 Hz, the RZ 6 provides the vacuum performance required for freeze drying, vacuum ovens, fine vacuum distillation, degassing, Schlenk-line applications, and other demanding laboratory and process workflows.
This brand-new VACUUBRAND RZ 6 rotary vane pump is available from American Instrument Exchange and provides a powerful vacuum source in a relatively compact package. Its two-stage oil-sealed design, integrated gas ballast, high pumping speed near ultimate vacuum, low operating noise, and proven VACUUBRAND engineering make the RZ 6 an excellent choice for research laboratories, pharmaceutical facilities, chemistry laboratories, pilot plants, and other applications requiring reliable high vacuum.
VACUUBRAND RZ 6 Rotary Vane Vacuum Pump Key Features
-
Brand-new VACUUBRAND RZ 6 rotary vane vacuum pump
-
Two-stage oil-sealed rotary vane design
-
Ultimate vacuum of 2 × 10⁻³ mbar / 1.5 × 10⁻³ Torr
-
4.0 cfm maximum pumping speed at 60 Hz
-
5.7 m³/h maximum pumping speed at 50 Hz
-
Ultimate partial vacuum down to 4 × 10⁻⁴ mbar
-
Integrated gas ballast for handling condensable vapors
-
40 mbar water vapor tolerance with gas ballast
-
Strong pumping speed even as the pump approaches ultimate vacuum
-
Compact design for its vacuum capacity
-
KF DN 16 vacuum inlet
-
Quiet operation at approximately 50 dBA
-
IP40 protection class
-
NRTL certified on applicable U.S. configuration
-
Supplied oil-filled and ready for operation
-
Available brand new from American Instrument Exchange
-
Manufacturer's warranty included
VACUUBRAND RZ 6 Two-Stage Rotary Vane Pump Overview
The VACUUBRAND RZ 6 is designed for laboratory processes where the moderate vacuum produced by a diaphragm pump is insufficient. Its two-stage rotary vane architecture enables the pump to reach pressures several orders of magnitude lower than general-purpose filtration pumps, making the RZ 6 particularly useful for laboratory freeze dryers, vacuum drying systems, high-vacuum degassing, fine vacuum distillation, and other processes requiring pressures in the 10⁻³ mbar range.
The pump combines this deep ultimate vacuum with substantial gas-handling capacity. At 60 Hz, the RZ 6 delivers up to 4.0 cfm, allowing it to evacuate laboratory apparatus rapidly while maintaining useful pumping speed as system pressure decreases.
An integrated gas ballast improves performance when handling condensable vapors. Opening the gas ballast introduces a controlled amount of gas during compression, helping reduce condensation of water vapor and other condensable substances inside the pump. This is particularly valuable for drying and freeze-drying applications where significant water vapor may reach the vacuum pump.
Despite its high-vacuum capability, the RZ 6 remains relatively compact and quiet. This combination of deep vacuum, pumping speed, gas-ballast capability, and laboratory-friendly construction has made two-stage VACUUBRAND rotary vane pumps a strong choice for demanding research and process applications.
VACUUBRAND RZ 6 Rotary Vane Vacuum Pump Key Specifications
| Specification |
Details |
| Manufacturer |
VACUUBRAND |
| Model |
RZ 6 |
| Catalog Number |
20698136 |
| Equipment Type |
Two-Stage Rotary Vane Vacuum Pump |
| Pump Design |
Oil-Sealed Rotary Vane |
| Number of Stages |
2 |
| Maximum Pumping Speed at 60 Hz |
4.0 cfm |
| Maximum Pumping Speed at 50 Hz |
5.7 m³/h |
| Ultimate Vacuum |
2 × 10⁻³ mbar / 1.5 × 10⁻³ Torr |
| Ultimate Vacuum with Gas Ballast |
1 × 10⁻² mbar / 7.5 × 10⁻³ Torr |
| Ultimate Partial Vacuum without Gas Ballast |
4 × 10⁻⁴ mbar / 3 × 10⁻⁴ Torr |
| Water Vapor Tolerance |
40 mbar / 30 Torr |
| Maximum Outlet Pressure |
1.1 bar absolute |
| Inlet Connection |
Small Flange KF DN 16 / Hose Nozzle DN 10 mm |
| Outlet Connection |
Hose Nozzle DN 8–10 mm |
| Oil Capacity |
0.34–0.73 L |
| Rated Motor Power |
0.18 kW / 180 W |
| Rated Motor Speed |
1500 rpm at 50 Hz / 1800 rpm at 60 Hz |
| Operating Ambient Temperature |
12°C to 40°C |
| Storage Temperature |
-10°C to 60°C |
| Dimensions (L × W × H) |
420 × 156 × 240 mm (16.5 × 6.1 × 9.4 in.) |
| Weight |
17.0 kg (37.5 lb) |
| Sound Pressure Level |
Approximately 50 dBA
|
| Protection Class |
IP40 |
| Electrical Requirements |
Configuration dependent; U.S. and international versions available |
| Certification |
NRTL Certified on applicable configuration |
| Condition |
Brand New |
Energy Efficiency & Operating Costs
The RZ 6 uses a 180-watt motor to provide up to 4.0 cfm pumping speed and high-vacuum performance down to 2 × 10⁻³ mbar. Its strong pumping speed close to ultimate vacuum can help processes reach their target pressure efficiently rather than requiring prolonged operation of an undersized pump.
Unlike the oil-free VACUUBRAND ME-series diaphragm pumps, however, the RZ 6 is an oil-sealed rotary vane pump. Routine ownership therefore includes monitoring and periodically replacing vacuum pump oil. Oil-change frequency depends heavily on the application and the quantity and type of vapors entering the pump.
Using an appropriate inlet separator, cold trap, exhaust oil-mist filter, or other vacuum accessories can help protect the pump and extend oil service life in demanding applications.
Specifications compiled from VACUUBRAND manufacturer literature and American Instrument Exchange product information.
Common Applications
The VACUUBRAND RZ 6 is commonly used for laboratory freeze drying, lyophilization, vacuum ovens, vacuum drying chambers, fine vacuum distillation, high-vacuum degassing, Schlenk-line chemistry, vacuum manifolds, evacuation of laboratory apparatus, and research applications requiring deep vacuum.
Its combination of relatively high pumping speed and low ultimate pressure makes it particularly useful for processes where both rapid evacuation and high final vacuum are important.
Ideal Laboratory Types
The VACUUBRAND RZ 6 is well suited for pharmaceutical laboratories, biotechnology companies, chemistry laboratories, university research facilities, materials science laboratories, pilot plants, analytical laboratories, industrial R&D facilities, vacuum-processing laboratories, and facilities operating laboratory freeze dryers or vacuum ovens.
Laboratories utilizing freeze dryers, vacuum ovens, rotary evaporators, Schlenk lines, gloveboxes, vacuum manifolds, and other vacuum-dependent equipment may use a two-stage rotary vane pump such as the RZ 6 as a dedicated high-vacuum source.
High Vacuum Performance
The defining advantage of the RZ 6 is its ability to combine 4.0 cfm pumping speed at 60 Hz with an ultimate vacuum of 2 × 10⁻³ mbar.
A two-stage rotary vane pump compresses the gas through two successive pumping stages. This allows substantially lower ultimate pressures than are normally possible with single-stage rotary vane or diaphragm pumps.
VACUUBRAND also specifies an ultimate partial vacuum of 4 × 10⁻⁴ mbar without gas ballast, demonstrating the pump's suitability for demanding fine-vacuum applications.
Importantly, the RZ 6 maintains useful pumping speed as pressure approaches ultimate vacuum. This helps reduce evacuation times and makes the pump suitable for laboratory equipment that must repeatedly transition from atmospheric pressure to deep vacuum.
Gas Ballast & Water Vapor Handling
The integrated gas ballast is particularly valuable for applications involving water vapor and other condensable vapors.
VACUUBRAND specifies a water vapor tolerance of 40 mbar (30 Torr) with the gas ballast in use. Introducing gas during the compression cycle helps prevent vapor from condensing into the pump oil, reducing oil contamination during suitable drying and evaporation processes.
With gas ballast open, the specified ultimate vacuum is approximately 1 × 10⁻² mbar, compared with 2 × 10⁻³ mbar with gas ballast closed. Operators can therefore select the appropriate configuration based on whether maximum vacuum or improved condensable-vapor handling is more important during a particular stage of the process.
RZ 6 for Laboratory Freeze Dryers
The RZ 6 is particularly well suited as a vacuum pump for appropriately sized laboratory freeze dryers and lyophilizers.
Freeze drying requires pressures substantially below those produced by routine filtration pumps. The RZ 6's two-stage design provides the deep vacuum necessary to support sublimation while its 4.0 cfm pumping speed helps evacuate the freeze dryer chamber and remove non-condensable gases.
Actual freeze dryer compatibility depends on chamber size, condenser capacity, vapor load, manufacturer vacuum requirements, and the specific process. Buyers should confirm the required pumping speed and ultimate pressure for their freeze dryer before selecting a pump.
RZ 6 for Vacuum Ovens and Drying Chambers
Vacuum ovens and drying chambers can also benefit from the combination of pumping speed and deep vacuum offered by the RZ 6. Lowering chamber pressure reduces the boiling point of water and many solvents, allowing moisture removal and drying at lower temperatures.
For applications producing substantial condensable vapor loads, an appropriate cold trap or inlet separator may be advisable to reduce the amount of vapor reaching the pump oil.
Rotary Vane vs. Diaphragm Vacuum Pumps
The RZ 6 serves a very different purpose from VACUUBRAND diaphragm pumps such as the ME 1 and ME 1C.
The ME 1 is optimized for vacuum filtration and routine moderate-vacuum sample preparation. The ME 1C adds enhanced chemical resistance for applications involving aggressive vapors.
The RZ 6, by contrast, is designed for applications requiring much deeper vacuum. Its 2 × 10⁻³ mbar ultimate pressure makes it appropriate for freeze drying, fine vacuum distillation, high-vacuum drying, degassing, and other processes that cannot be adequately served by a 100 mbar diaphragm pump.
The tradeoff is that the RZ 6 uses vacuum oil and therefore requires routine oil monitoring and maintenance.
Recommended Laboratory Applications
The VACUUBRAND RZ 6 is recommended for:
-
Laboratory freeze dryers and lyophilizers
-
Vacuum ovens
-
Vacuum drying chambers
-
Fine vacuum distillation
-
Schlenk-line chemistry
-
High-vacuum degassing
-
Vacuum manifolds
-
Evacuation of laboratory apparatus
-
Materials research
-
Pharmaceutical process development
-
Pilot-scale vacuum processes
-
General fine-vacuum research
Application compatibility should always be evaluated based on required ultimate pressure, gas load, solvent compatibility, vapor load, and pumping-speed requirements.
Brand-New VACUUBRAND Vacuum Pumps from American Instrument Exchange
American Instrument Exchange offers the VACUUBRAND RZ 6 brand new, giving laboratories access to current VACUUBRAND high-vacuum technology from an established laboratory equipment supplier.
American Instrument Exchange also offers other new VACUUBRAND pumps, including oil-free diaphragm pumps, chemistry diaphragm pumps, rotary vane pumps, and chemistry-hybrid vacuum systems. This allows laboratories to select vacuum technology based on the actual pressure range, pumping speed, chemical resistance, and application requirements rather than relying on a one-size-fits-all vacuum source.
Shipping and Installation Considerations
The VACUUBRAND RZ 6 is supplied oil-filled and assembled for operation. The pump should be installed on a stable, level surface in a well-ventilated location with adequate clearance for cooling and routine maintenance.
Users should verify the exact voltage and electrical configuration of the pump being purchased before installation. Vacuum connections should be appropriately sized and rated for the required pressure range. Restrictive or undersized vacuum tubing can significantly reduce effective pumping speed at the connected equipment.
For applications involving condensable vapors, solvents, corrosive materials, or particulates, laboratories should evaluate suitable inlet separators, cold traps, exhaust filters, and other protective accessories.
Related Laboratory Equipment
Laboratories purchasing two-stage rotary vane vacuum pumps often also require freeze dryers, vacuum ovens, rotary evaporators, vacuum manifolds, cold traps, recirculating chillers, filtration equipment, and chemical fume hoods. American Instrument Exchange offers new and refurbished laboratory equipment to support pharmaceutical development, chemistry, biotechnology, materials science, analytical research, and industrial laboratory applications.
VACUUBRAND RZ 6 Rotary Vane Vacuum Pump Frequently Asked Questions
What is the ultimate vacuum of the VACUUBRAND RZ 6?
The RZ 6 reaches an ultimate vacuum of 2 × 10⁻³ mbar, or approximately 1.5 × 10⁻³ Torr, with the gas ballast closed.
What is the pumping speed of the RZ 6?
The RZ 6 provides a maximum pumping speed of approximately 4.0 cfm at 60 Hz or 5.7 m³/h at 50 Hz.
Is the VACUUBRAND RZ 6 a two-stage pump?
Yes. The RZ 6 is a two-stage oil-sealed rotary vane pump, allowing it to achieve substantially deeper vacuum than typical single-stage pumps or laboratory diaphragm pumps.
Can the VACUUBRAND RZ 6 be used with a freeze dryer?
Yes. The RZ 6 is well suited to many laboratory freeze-drying and lyophilization applications because it combines deep ultimate vacuum with substantial pumping speed. Compatibility should be confirmed against the vacuum and pumping-speed requirements of the specific freeze dryer.
Is the RZ 6 suitable for a vacuum oven?
Yes. The RZ 6 can provide the deep vacuum required for many laboratory vacuum ovens and drying chambers. A cold trap or inlet separator may be recommended when the process generates significant quantities of condensable vapor.
What does the gas ballast do?
The gas ballast helps the pump handle condensable vapors by reducing condensation inside the pump during compression. This can help protect the vacuum oil when processing water vapor and other suitable condensable gases.
What vacuum can the RZ 6 reach with the gas ballast open?
VACUUBRAND specifies an ultimate vacuum of approximately 1 × 10⁻² mbar with the gas ballast open.
Does the RZ 6 require vacuum pump oil?
Yes. Unlike VACUUBRAND's oil-free diaphragm pumps, the RZ 6 is an oil-sealed rotary vane pump. The oil level and condition should be monitored and the oil replaced according to operating conditions and manufacturer recommendations.
How much oil does the RZ 6 hold?
VACUUBRAND specifies an operating oil capacity between approximately 0.34 and 0.73 liters.
How loud is the VACUUBRAND RZ 6?
The RZ 6 has a specified sound pressure level of approximately 50 dBA, making it relatively quiet considering its pumping capacity and ultimate vacuum.
What is the difference between the RZ 6 and VACUUBRAND ME 1 or ME 1C pumps?
The ME 1 and ME 1C are diaphragm pumps intended primarily for moderate-vacuum applications such as filtration and sample preparation. The RZ 6 is a two-stage rotary vane pump capable of much deeper vacuum, making it better suited for freeze drying, vacuum ovens, fine vacuum distillation, and high-vacuum degassing.
Is this VACUUBRAND RZ 6 refurbished or used?
No. This VACUUBRAND RZ 6 Two-Stage Rotary Vane Vacuum Pump is brand new, not refurbished or previously used, and is available from American Instrument Exchange with the applicable manufacturer's warranty.
