Positive Pressure Vacuum Pumps and Vacuum Generators
Last Updated: April 1, 2025
Description
Positive Pressure Vacuum Pumps and Vacuum Generators are devices designed to create and maintain a vacuum by removing gas molecules from a sealed volume. These systems are essential in various industrial and scientific processes where a controlled vacuum environment is required.
Working Principle
Positive Pressure Vacuum Pumps operate on the principle of positive displacement, where gas is mechanically moved through a fixed volume chamber. This method ensures a consistent pumping speed for all gases, making it highly efficient for various applications. Vacuum generators, such as Venturi vacuum generators, utilize the gas-transfer principle, where gases are moved through the pump, often using a venturi effect to create a vacuum. These systems are useful because they can operate continuously without the need for regeneration, providing a reliable vacuum source for extended periods.
Applications
Venturi vacuum generators are commonly used in applications such as evacuating vapors or fumes from process vessels, priming pumps, vacuum drying of air conditioners, and machine shop workholding operations. Specific examples include pick and place operations, clamping, chucking, alignment, and surface mounting in machine shops .
Advantages over other Vacuum Pumps and Vacuum Generators
Positive displacement pumps, such as claw pumps, offer advantages in harsh industrial environments, particularly in semiconductor processing and situations with high water vapor content. Their design minimizes friction and wear, enhancing durability and efficiency .
Limitations
The performance of vacuum pumps is limited by their ultimate operating vacuum or ultimate pressure, which is the lowest pressure they can generate. This value is often theoretical and may not be achievable under normal operating conditions due to factors like the presence of condensable gases .
Considerations
When selecting a vacuum pump or generator, considerations should include initial costs, operating expenses, durability, accuracy, and maintenance costs. Positive displacement pumps, for example, are designed to minimize wear, potentially reducing maintenance costs over time. However, the specific operating conditions and requirements of the application will significantly influence these factors.
from Champion
Reciprocating Air-Cooled Air Compressors- Vacuum. Pressure Lubricated, A-Series. The A-series reputation has been built on quality, reliability and accessibility to all components. Products include air-cooled bare compressors, boosters and vacuum pumps. A-Series pumps include heavy duty cast iron... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Pumping Speed: 198
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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Scientific; Medical / Laboratory
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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Medical / Laboratory; Pharm/Sanitary; Vacuum Metallurgy, Thin Film Coating
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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Medical / Laboratory; Pharm/Sanitary; Vacuum Metallurgy, Thin Film Coating
from Edwards Vacuum
Edwards E2M275 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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Medical / Laboratory; Pharm/Sanitary; Vacuum Metallurgy, Thin Film Coating
from Edwards Vacuum
Edwards E2M275 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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Medical / Laboratory; Pharm/Sanitary; Vacuum Metallurgy, Thin Film Coating
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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Medical / Laboratory; Pharm/Sanitary; Vacuum Metallurgy, Thin Film Coating
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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Medical / Laboratory; Pharm/Sanitary; Vacuum Metallurgy, Thin Film Coating
from Edwards Vacuum
Edwards E2M80 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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Medical / Laboratory; Pharm/Sanitary; Vacuum Metallurgy, Thin Film Coating
from Edwards Vacuum
Edwards E2M80 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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Medical / Laboratory; Pharm/Sanitary; Vacuum Metallurgy, Thin Film Coating
from Edwards Vacuum
Stokes MB Multi-stage pumping systems are available in two options, consisting of a Microvac piston pump and a Stokes 607 mechanical booster pump. The compact direct mounted packages provide high performance pumping from atmosphere. The MB systems are ideal for high cycling arduous applications. [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
Stokes MB Multi-stage pumping systems are available in two options, consisting of a Microvac piston pump and a Stokes 607 mechanical booster pump. The compact direct mounted packages provide high performance pumping from atmosphere. The MB systems are ideal for high cycling arduous applications. The... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
The EM range of oil-sealed rotary pumps - renowned for its high ultimate vacuum, rapid pumping speed, quiet operation and ability to handle vapor - has become the industry standard for laboratory applications. The E1M18 pump is a one-stage, direct drive, sliding vane pump. The pump is oil sealed and... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Scientific; Medical / Laboratory
from Edwards Vacuum
Whether you need to increase the capacity of your existing system or achieve peak performance for a new installation; Edwards makes taking advantage of the latest technology easy. These field-proven pumping systems are the workhorse of countless industrial and large chamber applications. Each... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
Whether you need to increase the capacity of your existing system or achieve peak performance for a new installation; Edwards makes taking advantage of the latest technology easy. These field-proven pumping systems are the workhorse of countless industrial and large chamber applications. Each... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
Whether you need to increase the capacity of your existing system or achieve peak performance for a new installation; Edwards makes taking advantage of the latest technology easy. These field-proven pumping systems are the workhorse of countless industrial and large chamber applications. Each... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
Whether you need to increase the capacity of your existing system or achieve peak performance for a new installation; Edwards makes taking advantage of the latest technology easy. These field-proven pumping systems are the workhorse of countless industrial and large chamber applications. Each... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
Whether you need to increase the capacity of your existing system or achieve peak performance for a new installation; Edwards makes taking advantage of the latest technology easy. These field-proven pumping systems are the workhorse of countless industrial and large chamber applications. Each... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
Whether you need to increase the capacity of your existing system or achieve peak performance for a new installation; Edwards makes taking advantage of the latest technology easy. These field-proven pumping systems are the workhorse of countless industrial and large chamber applications. Each... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
Whether you need to increase the capacity of your existing system or achieve peak performance for a new installation; Edwards makes taking advantage of the latest technology easy. These field-proven pumping systems are the workhorse of countless industrial and large chamber applications. Each... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
Whether you need to increase the capacity of your existing system or achieve peak performance for a new installation; Edwards makes taking advantage of the latest technology easy. These field-proven pumping systems are the workhorse of countless industrial and large chamber applications. Each... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Edwards Vacuum
The Stokes Microvac rotary piston pump sets the standard for performance and reliability as the industrys most efficient, space-saving design. The Stokes Microvac rotary piston pump has been improved, upgraded, and fine-tuned to deliver even better dependability and productivity combined with... [See More]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Manufacturing; Pharm/Sanitary; Metallurgy, Coating
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]
- Lubrication Style: Positive Pressure
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Scientific; Medical / Laboratory