Piston Pumps and Compressors

Thomas piston pumps and compressors are renowned for their innovation and reliability in oil-free piston technology. Both the WOB-L® and Articulated Piston variants have unique advantages, showcasing our commitment to excellence.

Thomas WOB-L® Piston Pumps:

• Invented by Thomas in 1976, it is now one of the most common pump technologies in the world.
• Low vibration and balanced flow for operational smoothness.
• Low power consumption reduces energy costs and aligns with sustainable practices.
• Higher capabilities in a compact design for versatile usage in limited spaces.
• Generates the highest pressure among pump technologies.
• Oil-free design with corrosion-resistant materials for a contamination-free environment.
• Relies on continuous work cycles without frequent maintenance, highlighting reliability and durability.

Thomas Articulated Piston Pumps:

• Designed for precision high-pressure, high-volume airflow with straight up/straight down piston motion.
• Capable of stopping, restarting against back pressure, and running continuously at high pressures (175 psig/12 bar), ensuring uninterrupted performance.
• Thrives in diverse conditions, showcasing exceptional adaptability—from dirty and dusty to hot and cold environments.

Thomas piston pumps find their home in diverse industries, ranging from medical and automotive to defense and industrial:

• Our WOB-L® technology excels in industries requiring long life and high performance, such as medical, food & beverage, automotive or environmental. High-pressure WOB-L 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.

• Articulated piston compressors are most often used in medium and heavy duty air suspension systems that require high air flow and long run times. Additionally, they are selected when an application demands exceed typical piston pump technology limitations, as in many industrial applications such as air suspension, central tire inflation system, or dry sprinkler systems.

Thomas offers over thirty standard catalog series and a limitless range of possible pump configurations. The articulated and WOB-L® pumps are customizable with options for materials, pneumatic connections, mounting, electrical connections, cooling airflow directions, and multiple strokes and bore sizes to tailor the performance to specific requirements.

• Free flow up to 250 L/min (9 CFM)

• Maximum pressure up to 12.1 bar (175 psi)

• Maximum vacuum up to -990 mbar (29.2 in Hg)

• Optional restart against pressure or vacuum

• Single or twin piston

• Parallel flow or two-stage

• AC, DC, or brushless DC

Application expertise enables our engineers to tailor pump performance even to the most complex and challenging application. Talk to one of our engineers for tailored solutions.

While both WOB-L® and Articulated Piston Pumps share the common goal of reliable performance, understanding their differences is crucial for selecting the right solution for your specific needs.