Claw Vacuum Pumps and Vacuum Generators
Last Updated: April 1, 2025
Description
Claw vacuum pumps and vacuum generators are devices designed to create a vacuum by removing air and other gases from a sealed environment. They achieve this by utilizing a pair of claw-shaped rotors that operate within a stator, effectively compressing and expelling gases to maintain a vacuum.
Working Principle
Claw vacuum pumps operate on the positive displacement principle, where precision-designed intermeshing hooked claws rotate with tight tolerances and clearances. This design allows for highly efficient internal compression of gases. The motion and shape of the claw rotors draw in process gas, compress it, and transport it to the outlet, where it is expelled. This non-contact operation minimizes friction and wear, making claw pumps particularly useful in harsh industrial environments where high efficiency and low maintenance are required .
Applications
Claw vacuum pumps are widely used in various industrial applications. They are particularly effective in pneumatic suction conveying, where they have become the standard vacuum generators due to their energy efficiency and low maintenance requirements . Other specific applications include degassing, compounding, calibration, pick & place, thermoforming, and pneumatic conveying in the plastics industry .
Advantages over other Vacuum Pumps and Vacuum Generators
Claw vacuum pumps offer several advantages over other types of vacuum pumps. They are nearly maintenance-free and extremely energy-efficient due to their oil- and contact-free compression . The design allows for quick and easy cleaning of the claws without the need to readjust synchronization, reducing downtime and maintenance efforts . Additionally, their robust construction with stainless steel rotors and corrosion-resistant coatings ensures high performance even in harsh environments .
Limitations
One limitation of claw vacuum pumps is their ultimate pressure capability, which is just below 10^-1 Torr. This may not be sufficient for applications requiring ultra-high vacuum levels .
Considerations
When considering claw vacuum pumps, it is important to evaluate initial costs, which can be higher due to their advanced design and materials. However, their operating expenses are generally lower due to energy efficiency and minimal maintenance requirements. The durability of these pumps is enhanced by their non-contact operation and corrosion-resistant materials, which contribute to a longer lifespan and reduced replacement costs .
from Rogers Machinery Company, Inc.
The claw pump has two contact free claw-shaped rotors, turning in opposite directions from one another. These rotors are timed and synchronized using a high-performance gearbox. As the rotors turn, the claw travels over the suction connection, pulling inlet gas into the compression chamber. As... [See More]
- Mechanical: Claw
- Ultimate Vacuum: 113
- Pumping Speed: 71
from Busch Vacuum Solutions
The Busch Mink MI BV Series positive displacement vacuum pumps feature a compact rotary claw design that is air-cooled, dry-running and non-contacting. These features along with quality construction results in a pump that offers extremely high reliability and a long service life. Features. Two... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Food; Manufacturing; Medical / Laboratory; Packaging; Wood, Printing, Ceramics, Environmental, Sewage Industries
from Busch Vacuum Solutions
The Mink MV 0310 B belongs to the Busch product family of proven Mink claw vacuum pumps. Mink claw vacuum pumps feature two claw-shaped rotors that move in opposite directions, mounted in a housing. The shape of these claw rotors extracts, compresses and expels air or gas. The rotors do not come in... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Manufacturing; Packaging
from Busch Vacuum Solutions
The Mink MV 0312 B belongs to the Busch product family of proven Mink claw vacuum pumps. Operation without oil or water. Mink claw vacuum pumps have been developed especially for use in industrial applications where a constant vacuum, high suction capacity and totally oil-free compression are... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Manufacturing; Packaging
from Busch Vacuum Solutions
The Mink MV 0502/0602 B belongs to the Busch product family of proven Mink claw vacuum pumps. Operation without oil or water. Mink claw vacuum pumps have been developed especially for use in industrial applications where a constant vacuum, high suction capacity and totally oil-free compression are... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Manufacturing; Packaging
from Busch Vacuum Solutions
The Mink MV 1202 A belongs to the Busch product family of proven Mink claw vacuum pumps. Operation without oil or water. Mink claw vacuum pumps have been developed especially for use in industrial applications where a constant vacuum, high suction capacity and totally oil-free compression are... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Manufacturing; Packaging
from Busch Vacuum Solutions
Efficient: energy-efficient, minimized operating costs. Nearly Maintenance-Free: dry and contact-free compression. Reliable: operationally reliable. Busch Mink claw vacuum technology for industrial vacuum generation offers the highest possible energy efficiency combined with low maintenance and a... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial
from Gast Group
Claw pumps contain contactless rotors that are synchronized by gears without any lubricant present. This provides them the benefit of avoiding any residue generated by friction or rubbing during rotation. The lack of friction between the rotors also leads to lower maintenance and long lasting... [See More]
- Mechanical: Claw; Compression / Pressure Service
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical; Claw
- Application: Industrial
from Gardner Denver, Inc.
Vacuum Pumps & Systems. Visit Industrials Group - Vacuum Pumps. Gardner Denver is a leading global provider of high quality industrial equipment, technologies and services. Our engineering expertise, coupled with worldwide manufacturing and service capabilities, ensure the most reliable, energy... [See More]
- Mechanical: Claw; Diaphragm; Liquid Ring; Regenerative Blower; Rotary Vane; Rotary Screw; Compression / Pressure Service (optional feature)
- Configuration: Individual Vacuum Pump (optional feature); Vacuum Pump System or Station (optional feature)
- Vacuum Pump Type: Mechanical
from Edwards Vacuum
EDP pumps are based on Edwards' oil-free, non-contacting, award-winning, reverse claw mechanism. They provide consistent vacuum at high efficiencies and low costs of ownership. Dry pumps completely eliminate all problems of process contamination and creation of polluted effluent, which are... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical
from Elmo Rietschle Gardner Denver Hanover, Inc.
Pressure-vacuum pumps C-KLR. Volume flow. 80 to 140 m ³hr. 47.1 to 82.4 cfm. High efficiency, dry and contact-free compression claw pressure vacuum pumps with capacities ranging from 80 to 140 m ³/hr (47.1 to 82.4 cfm). Vacuum up to - 0.6 bar and pressure up to + 1.0 bar. Low maintenance,... [See More]
- Mechanical: Claw; Compression / Pressure Service
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Pumping Speed: 47.1 to 82.4
from Edwards Vacuum
EDP pumps are based on Edwards' oil-free, non-contacting, award-winning, reverse claw mechanism. They provide consistent vacuum at high efficiencies and low costs of ownership. Dry pumps completely eliminate all problems of process contamination and creation of polluted effluent, which are... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical
from Elmo Rietschle Gardner Denver Hanover, Inc.
Vacuum pumps C-VLR. Volume flow. 60 to 1140 m ³/hr. 35.3 to 671 cfm. High efficiency, dry and contact-free compression claw vacuum pump with capacities ranging from 60 to 1140 m ³/hr (35.3 to 671 cfm). The maximum ultimate vacuum at continuous operation is up to 50 mbar (abs). Low... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Pumping Speed: 35.3 to 671
from Edwards Vacuum
EDP pumps are based on Edwards' oil-free, non-contacting, award-winning, reverse claw mechanism. They provide consistent vacuum at high efficiencies and low costs of ownership. Dry pumps completely eliminate all problems of process contamination and creation of polluted effluent, which are... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical
from Edwards Vacuum
Edwards offers a range of CPH Dry Chemical Pumps designed to be used in a wide range of chemical and pharmaceutical applications. They can be used on their own, or in combination with Edwards 'industry standard' EH mechanical booster pumps to increase both pump capacity and ultimate vacuum. All CPH... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Chemical; Pharm/Sanitary
from Edwards Vacuum
Edwards have pioneered the use of dry vacuum pumps in some of the most harsh applications. With over 20 years experience and more than 100,000 Drystar pumps installed world-wide. Our GV Drystar pumps are designed to handle large volumes of dust and water vapor without the risk of process... [See More]
- Mechanical: Claw
- Configuration: Individual Vacuum Pump
- Vacuum Pump Type: Mechanical
- Application: Industrial; Manufacturing; Coating, Steel Degassing
from Edwards Vacuum
Edwards advanced semiconductor vacuum pumps have been field-proven to perform to the highest operating standards. Reliability and high performance are achieved by extending service life, improving uptime and increasing productivity, while minimizing footprint and cost of ownership. The iH Series... [See More]
- Mechanical: Claw
- Configuration: Combination
- Vacuum Pump Type: Mechanical
- Application: Semiconductor