Selling and servicing all makes of air compressors and vacuum pumps across Canada since 1975. A company you can trust. A company with integrity. CompreVac Inc.
Compact oil-less piston vacuum pumps and compressors delivering high pressure, deep vacuum and strong airflow for demanding OEM medical, industrial and process applications.
Thomas WOB-L® technology combines piston performance with a compact pump architecture capable of flows up to 212.4 L/min, pressure up to 175 PSI and vacuum levels approaching 29.2 inHg.
Thomas WOB-L® piston pumps use proprietary wobble-piston technology to provide higher pressure and airflow capabilities than many other compact pump technologies.
The combination of pressure capability, vacuum performance and compact dimensions makes WOB-L® pumps particularly useful where equipment designers need significant pneumatic performance but have limited installation space.
The Thomas WOB-L® portfolio includes more than thirty standard catalog series together with a broad range of possible pump, motor and mounting configurations.
A broad range of WOB-L® platforms allows OEM engineers to select a pump around the required airflow, pressure, vacuum and operating life.
Approximately 0.19 CFM at the lower end of the WOB-L® product range.
Up to approximately 7.5 CFM depending on pump configuration.
Pressure capability up to approximately 175 PSI.
Deep vacuum capability down to approximately 1 mbar absolute.
Single and twin piston designs are available depending on performance requirements.
Single-stage and two-stage arrangements expand pressure and vacuum capability.
WOB-L® technology provides a strong combination of performance, compact dimensions and application flexibility.
Wobble piston technology provides very high pressure capability relative to many compact pump technologies.
Selected WOB-L® configurations can achieve vacuum levels approaching 29.2 inHg.
High pneumatic performance from a relatively small footprint helps simplify integration into OEM machinery.
Balanced flow and engineered piston configurations help provide smooth operation.
Low-power platforms are available for applications where electrical efficiency is an important design requirement.
Dry-running operation eliminates lubricating oil from the pumped air or gas path.
Thomas provides an extensive range of standard pumps and configuration options for integration into OEM systems.
Select single or twin piston architecture according to the required airflow and pneumatic performance.
Stage configurations allow pump performance to be optimized for pressure or deeper vacuum.
AC, DC and brushless DC motor options allow the pump to match electrical and lifetime requirements.
Port arrangements can be selected to simplify tubing and installation within the finished machine.
Foot mounting and other installation configurations support different OEM equipment layouts.
Cooling airflow direction and material selections can be configured for specific operating environments.
High pressure, strong airflow, deep vacuum and oil-less operation make WOB-L® technology suitable for demanding gas-handling applications.
WOB-L® pumps are dry-running reciprocating piston pumps. Rotary energy from the motor is converted into linear piston movement inside the pump cylinder.
Correct pump selection requires evaluating the actual operating point and the requirements of the finished OEM system.
Common engineering questions about Thomas WOB-L® piston compressors and vacuum pumps.
A Thomas WOB-L® pump is a dry-running reciprocating piston pump using an eccentric drive that produces the characteristic wobble movement of the piston. The technology can generate pressure, vacuum or both depending on configuration.
Depending on the model and configuration, Thomas WOB-L® compressors can provide pressure up to approximately 12 bar or 175 PSI.
Selected WOB-L® vacuum pump configurations can achieve vacuum levels down to approximately 1 mbar absolute, equivalent to approximately 29.2 inHg vacuum.
The Thomas WOB-L® range covers flow rates from approximately 5.4 L/min or 0.19 CFM through 212.4 L/min or 7.5 CFM, depending on the pump platform.
WOB-L® pumps are dry-running oil-less pumps, making them suitable for applications where lubricant contamination of the pumped air or gas is undesirable.
Yes. Thomas offers both single and twin piston WOB-L® designs, together with single-stage and two-stage configurations.
Thomas WOB-L® pumps can be configured with AC, DC or brushless DC motor technology depending on electrical, performance and lifetime requirements.
Yes. CompreVac can assist with model selection based on required airflow, pressure or vacuum, voltage, duty cycle, motor life, physical dimensions and OEM application requirements.
Contact CompreVac with your required airflow, pressure or vacuum, voltage, duty cycle and application details. We can help identify the appropriate Thomas WOB-L® piston compressor or vacuum pump for your OEM equipment.
Thomas piston pumps utilize proprietary WOB-L® pump technology from Gardner Denver. WOB-L® piston pumps can provide higher pressure and flow capabilities than many other pump technologies, in a much smaller package. They cover a wide range of applications due to the breadth of product platforms and performance capability.
Flow rates range from 5.4 l/min (0.19 cfm) to 212.4 l/min (7.5 cfm). The pneumatic performance covers pressures up to 12 bar (175 psi) and vacuum levels up to -990 mbar (29.2 in.Hg). Various motor options address lifetime requirements.
Benefits of Thomas WOB-L® Piston Pumps and Compressors
Thomas oil-less piston vacuum pump and compressors provide a range of remarkable benefits, such as:
Characteristics of Thomas WOB-L® Piston Pumps and Compressors
We have over thirty standard catalog series and a full range of possible pump configurations to offer. Thomas is well-known for offering an outstanding customization range that includes options for materials, head porting, foot mounting, electrical hook-up, cooling airflow directions, and multiple strokes, and bore sizes.
Choose Thomas Wobble Piston Compressors and Vacuum Pumps for a Wide Range of Gas Applications
Thomas WOB-L® piston compressors and vacuum pumps are the best choice for medical, food & beverage, automotive or environmental applications that require long life and high performance. High-pressure wobble piston pumps and compressors are often selected by the medical market for their high quality and reliability. Life-saving equipment such as oxygen concentrators, ventilators, and other breathing support devices rely on our piston pumps for their critical functions.Thomas has three manufacturing sites, located in the USA, Germany, and China to offer positive displacement pumps and compressor solutions for a variety of markets. With our capabilities of on-site regulatory testing, injection molding, and 3D printing we help to speed up time to market for our customers. Application expertise enables our engineers to tailor pump performance even to the most complex and challenging application.
How WOB-L® Piston Pump and Compressors Work?
The WOB-L® piston pumps are dry running reciprocating pumps. They convert the rotary motor’s energy into the piston's linear motion within the pump cylinder. The piston rod is mounted to an eccentric bearing assembly attached to the motor shaft.A rod/eccentric assembly that rotates about the shaft causes the piston end to tip or wobble, providing the origins for the trademark name. To compensate for the ‘wobbling’ and increase the pump's efficiency, the piston is sealed to the pump cylinder. It’s sealed by a flanged disk cup that forms both axial and radial seal along with a mechanical guide for the piston.