Two Stage Rotary Vane Vacuum Pumps and Systems
Description
Two-stage rotary vane vacuum pumps are mechanical devices designed to create a vacuum by removing gas molecules from a sealed volume. These pumps are characterized by their ability to achieve lower ultimate pressures compared to single-stage pumps, making them suitable for applications requiring deeper vacuums.
Working Principle
Two-stage rotary vane vacuum pumps operate using a rotor with vanes that rotate eccentrically within a cylindrical housing. As the rotor turns, the vanes slide out due to centrifugal force, creating variable volume compartments. Gas enters the enlarging suction chamber and is then compressed as the chamber volume decreases, eventually being expelled through the outlet. The two-stage design enhances the pump's ability to achieve lower pressures by effectively compressing the gas in two sequential stages, which is particularly useful for applications requiring high vacuum levels.
Applications
Two-stage rotary vane vacuum pumps are commonly used in applications that demand high vacuum levels. Specific examples include freeze-drying processes, where the deep vacuum is essential for removing moisture from samples, and vacuum impregnation, which involves the infiltration of materials with resins or other substances under vacuum conditions. They are also employed in vacuum filtering and materials handling, where maintaining a consistent vacuum is crucial for process efficiency.
Advantages over other Rotary Vane Vacuum Pumps and Systems
Compared to single-stage rotary vane pumps, two-stage versions offer the advantage of achieving lower ultimate pressures, making them more suitable for applications requiring deeper vacuums. They also provide higher displacement capacity, which can be beneficial in processes that require rapid evacuation of large volumes. Additionally, two-stage pumps are often more efficient than using multiple single-stage pumps in series, reducing the complexity and potential points of failure in a vacuum system.
Limitations
One limitation of two-stage rotary vane vacuum pumps is their reliance on oil for sealing and lubrication, which can lead to contamination issues if not properly managed. They may also require more maintenance compared to dry or oil-less pumps, as the oil needs to be regularly checked and replaced to ensure optimal performance. Additionally, while they achieve lower pressures, they may not be suitable for ultra-high vacuum applications that require even deeper vacuums.
Considerations
When selecting a two-stage rotary vane vacuum pump, it is important to consider the initial cost, which is generally higher than single-stage pumps due to their more complex design. Operating expenses should also be evaluated, as these pumps require regular oil changes and maintenance to prevent contamination and ensure longevity. Durability is a key factor, with the need to balance the pump's robustness against the specific demands of the application. Accuracy in achieving the desired vacuum level is crucial, and potential users should assess the pump's specifications to ensure it meets their requirements. Replacement and maintenance costs should be factored into the overall cost of ownership, as these can impact the long-term economic viability of the pump system.
from Agilent Technologies - Vacuum Products
The DS-102 is a dual-stage oil-sealed rotary vane pump that delivers a pumping speed of 5.0 m3/hr at 50 Hz, or 3.5 CFM at 60 Hz, with a base pressure of < 2 x 10-3 mbar. The DS-102 has a 'universal-voltage' single-phase electric motor rated for < 0.55 kW, with integral power switch. An inlet... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 3.47
- Ultimate Vacuum: 0.0015
- Lubrication Style: Oil-flooded
from Busch Vacuum Solutions
Efficient. Reliable: robust construction, proven technology, reliable operation. High Performance: stable pumping speed even in low pressure range. Quiet Operation. Easy servicing. Zebra two-stage rotary vane vacuum pumps have been designed to suit the requirements of a wide range of applications,... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 1.71 to 11.88
- Ultimate Vacuum: 0.0050
- Mounting: Benchtop
from Agilent Technologies - Vacuum Products
The DS-202 is a dual-stage oil-sealed rotary vane pump that delivers a pumping speed of 8.3 m3/hr at 50 Hz, or 5.8 CFM at 60 Hz, and a base pressure of < 2 x 10-3 mbar. The DS-102 has a low sound pressure, and has a 'universal-voltage' single-phase electric motor rated for < 0.55 kW, with... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 5.82
- Ultimate Vacuum: 0.0015
- Lubrication Style: Oil-flooded
from Busch Vacuum Solutions
Efficient. Reliable: robust construction, proven technology, reliable operation. High Performance: stable pumping speed even in low pressure range. Quiet Operation. Easy Servicing. Zebra two-stage rotary vane vacuum pumps have been designed to suit the requirements of a wide range of applications,... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 17.05 to 55.86
- Ultimate Vacuum: 0.0050
- Mounting: Floor or Skid-Mounted
from Agilent Technologies - Vacuum Products
The DS-302 is a dual-stage oil-sealed rotary vane pump that delivers a pumping speed of 11.6 m3/hr at 50 Hz, or 8.2 CFM at 60 Hz, and a base pressure of < 2 x 10-3 mbar. The DS-302 operates at a very quiet sound pressure, with a 'universal-voltage' single-phase electric motor, rated for < 0.55... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 8.17
- Ultimate Vacuum: 0.0015
- Lubrication Style: Oil-flooded
from Busch Vacuum Solutions
For decades, Huckepack HO oil-lubricated rotary vane vacuum pumps have established themselves in the market and demonstrated their robustness and operational reliability under the toughest conditions. All four sizes have a two-stage design. The fresh oil lubrication also enables corrosive gases or... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 94 to 447
- Ultimate Vacuum: 0.3750
- Mounting: Floor or Skid-Mounted
from Agilent Technologies - Vacuum Products
The DS-402 is a dual-stage oil-sealed rotary vane pump that delivers a pumping speed of 17.4 m3/hr / 12.3 CFM, and a base pressure of < 2 x 10-3 mbar. The DS-is available with a 'universal-voltage' single-phase motor rated for < 0.9 kW, with integral power switch a 3 Ф motor is also... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 12.29
- Ultimate Vacuum: 0.0015
- Lubrication Style: Oil-flooded
from Agilent Technologies - Vacuum Products
The Agilent DS40M 2 m3/hr rotary vane pump is a compact and quiet system. The pump delivers a pumping speed of 1.8 m3/hr at 50 Hz, or 1.3 CFM at 60 Hz, with a base pressure of < 7 x 10-3 mbar, while operating as low as 45 dBa. The 0.1 kW, single-phase motor is magnetically coupled to the pump... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 1.29
- Ultimate Vacuum: 0.0050 to 0.7553
- Lubrication Style: Oil-flooded
from Titus Company (The)
The GVD series of 2-stage oil sealed rotary vane vacuum pumps deliver excellent ultimate vacuum pressure, high pumping speeds and superior vapor handling capabilities with quiet operation. [See More]
- Pump Stages: Two Stage
- Pumping Speed: 0.4000 to 180
- Ultimate Vacuum: 2.3 to 7.7
- Mounting: Floor or Skid-Mounted
from Terra Universal, Inc.
Two-stage rotary vane high vacuum pumps for quicker and more efficient vacuum pumpdowns. Belt driven oil-seal design lowers RPM and maintenance. Welch DuoSeal Vacuum Pumps rugged design makes them long lasting and durable even under harsh operation conditions. The Model 1397 and 1374 vacuums have a... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 23
- Ultimate Vacuum: 9.75E-5
- Mounting: Floor or Skid-Mounted
from HullVac Pump Corporation
Quiet operation, low vibration, easy to install [See More]
- Pump Stages: Two Stage
- Pumping Speed: 10
- Ultimate Vacuum: 1.00E-4
- Mounting: Permanent Installation
from VACUUBRAND, Inc.
The two-stage RZ 2.5 rotary vane vacuum pumps are high- performance rotary vane pumps with low weight and an extra compact design about one-third that of belt-drive alternatives of comparable capacity. They are the ideal solution for a wide range of laboratory and process applications that require... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 1.35
- Ultimate Vacuum: 0.0015
- Mounting: Benchtop
from Edwards Vacuum
The E-LAB 2 pump includes all the components needed for laboratory applications such as wet chemistry and sample preparation. Based on Edwards proven past experience with vacuum pumps and developments in accessories, the E-LAB 2 pump allows continuous running, even in the presence of water and... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 1.9 to 2.6
- Ultimate Vacuum: 0.0760
- Mounting: Benchtop
from Bacharach, Inc.
Two-stage high performance vacuum pumps. Operate on 110 VAC/60 Hz and pull 25 microns vacuum (0.03 mbar). 1/4, 3/8 and 1/2 in. flared fittings. The QV line of vacuum pumps are two-stage high performance units designed for today's refrigerants. Rated for up to 5.3 CFM, these pumps pull 25 microns... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 1.7
- Ultimate Vacuum: 0.0225
- Description: 110V / 60Hz
from Titus Company (The)
The GVS 16-630 A series operates according to the proven oil-sealed rotary vane principle that has been successfully used for many years in all general vacuum applications of industry packed with innovative features that ensure the highest possible performance at the lowest possible lifecycle cost. [See More]
- Pump Stages: Two Stage
- Pumping Speed: 9 to 494
- Ultimate Vacuum: 0.0800 to 0.4000
- Mounting: Floor or Skid-Mounted
from Terra Universal, Inc.
Two stage rotary vane pump. High water vapor tolerance (60 mbar for P6Z and 35 mbar for P12Z). Max. leak rate of inlet valve 7x10-5 mbar l/sec. Integrated oil control glass. High temperature heat dissipation. Easy to service and clean. The P-Z series rotary vane pumps have a high water vapor... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 6.46 to 7.77
- Ultimate Vacuum: 1.13E-4
- Mounting: Floor or Skid-Mounted
from VACUUBRAND, Inc.
The powerful two-stage RZ 6 rotary vane vacuum pumps feature an unusually compact design and low weight for pumps of this capacity. They are the ideal solution for a wide range of laboratory and process applications that require low ultimate vacuum at medium to increased gas flow rate. Popular for... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 3.35
- Ultimate Vacuum: 0.0015
- Mounting: Benchtop
from Edwards Vacuum
Edwards E2M175 series two stage oil sealed rotary vane vacuum pumps are renowned for their high ultimate vacuum, rapid pumping speeds, quiet operation and ability to handle water vapour. These direct drive rotary vane pumps are inherently compact and vibration free, and with their finger-proof fan... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 105 to 126
- Ultimate Vacuum: 7.70E-4 to 0.0054
- Mounting: Permanent Installation
from VACUUBRAND, Inc.
The powerful two-stage RZ 9 rotary vane vacuum pumps are the ideal solution for a wide range of laboratory and process applications that require high pumping speed. Vacuum to 10-3 mbar. [See More]
- Pump Stages: Two Stage
- Pumping Speed: 5.23
- Ultimate Vacuum: 0.0015
- Mounting: Benchtop
from Edwards Vacuum
Edwards E2M175 series two stage oil sealed rotary vane vacuum pumps are renowned for their high ultimate vacuum, rapid pumping speeds, quiet operation and ability to handle water vapour. These direct drive rotary vane pumps are inherently compact and vibration free, and with their finger-proof fan... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 105 to 126
- Ultimate Vacuum: 7.70E-4 to 0.0054
- Mounting: Permanent Installation
from Edwards Vacuum
Edwards E2M40 series two stage oil sealed rotary vane vacuum pumps are renowned for their high ultimate vacuum, rapid pumping speeds, quiet operation and ability to handle water vapour. These direct drive rotary vane pumps are inherently compact and vibration free, and with their finger-proof fan... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 24.99 to 29.69
- Ultimate Vacuum: 7.70E-4 to 0.0054
- Mounting: Permanent Installation
from Edwards Vacuum
The E2M0.7 features a very low sound level of only 43 dB(A), compact dimensions, low energy consumption and low operating temperature. It will appeal to scientific instrument manufacturers and laboratory users for backing small turbomolecular or diffusion pumps as well as general laboratory... [See More]
- Pump Stages: Two Stage
- Pumping Speed: 0.4000 to 0.6000
- Ultimate Vacuum: 0.0023 to 0.1500
- Mounting: Benchtop